Pressure-driven and thermally-driven membrane operations for the treatment of arsenic-contaminated waters: a comparison
Publication date: Available online 12 July 2018Source: Journal of Hazardous MaterialsAuthor(s): A. Criscuoli, A. FigoliAbstractThe presence of arsenic in water beyond the admitted limits is becoming an important concern for many Countries. Methods usually employed for the arsenic removal from water are based on coagulation followed by filtration, ion-exchange, adsorption. Drawbacks like the use of chemicals and the production of sludges (in case of coagulation) have, however, to be mentioned. Membrane operations, based on the features of membrane materials involved in the separation, do not need chemicals and are easy to s...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Facile synthesis of smartaminosilane modified- SnO2/porous silica nanocomposite for high efficiency removal of lead ions and bacterial inactivation
Publication date: 5 October 2018Source: Journal of Hazardous Materials, Volume 359Author(s): Iman Kheshtzar, Mohsen Ghorbani, Maliheh Pashai Gatabi, Mohammad Soleimani LashkenariAbstractThe aim of the present study is to synthesize a new and proficient nanoadsorbent for rapid removal of heavy metals and disinfection of microorganisms. The proposed nanoadsorbent was fabricated using SnO2 nanoparticles as the core, coated with mesoporous silica and further modified with 3-Aminopropyl triethoxysilane to render SnO2/PSi/NH2 nanocomposite. The nanocomposite was characterized using Fourier Transform Infrared (FTIR), X-Ray diffra...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Intensification of UV-C tertiary treatment: Disinfection and removal of micropollutants by sulfate radical based Advanced Oxidation Processes
This study explores the enhancement of UV-C tertiary treatment by sulfate radical based Advanced Oxidation Processes (SR-AOPs), including photolytic activation of peroxymonosulfate (PMS) and persulfate (PS) and their photocatalytic activation using Fe(II). Their efficiency was assessed both for the inactivation of microorganisms and the removal or micropollutants (MPs) in real wastewater treatment plant effluents. Under the studied experimental range (UV-C dose 5.7–57 J/L; UV-C contact time 3 to 28 s), the photolysis of PMS and PS (0.01 mM) increased up to 25% the bacterial removal regarding to UV-C system. The...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Changes in atrazine speciation and the degradation pathway in red soil during the vermiremediation process
This study investigated the influence of two earthworm species (epigeic Eisenia foetida and endogeic Amynthas robustus) on atrazine speciation and the degradation pathway. Our results revealed that both earthworms significantly accelerated atrazine degradation in a 28-day vermiremediation, and the residual atrazine declined from 4.23 ± 0.21 mg/kg in bulk soils to 0.51 ± 0.29 mg/kg (E. foetida) and 0.43 ± 0.19 mg/kg (A. robustus). By consuming organic matter (from 40.37 ± 1.14 to 36.31 ± 1.55 and 34.59 ± 1.13 g/kg for E. foetida and A. robustus) and n...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Enantiospecific toxicity, distribution and bioaccumulation of chiral antidepressant venlafaxine and its metabolite in loach (Misgurnus anguillicaudatus) co-exposed to microplastic and the drugs
Publication date: Available online 22 April 2018Source: Journal of Hazardous MaterialsAuthor(s): Han Qu, Ruixue Ma, Bin Wang, Jian Yang, Lei Duan, Gang YuAbstractIn present study, we investigated the enantioselective behaviors of the chiral antidepressant venlafaxine and its metabolite O-desmethylvenlafaxine in loach Misgurnus anguillicaudatus (M. anguillicaudatus), as well as effects of microplastic on toxicity, distribution and metabolism through a 40-day co-exposure. The contents of SOD and MDA in loach liver elevated when the loach was exposed to venlafaxine and O-desmethylvenlafaxine. Moreover, co-exposure with microp...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Occurrence, control and fate of contaminants of emerging concern in environmental compartments in Brazil
Publication date: Available online 22 April 2018Source: Journal of Hazardous MaterialsAuthor(s): Maria Clara V.M. Starling, Camila C. Amorim, Mônica Maria D. LeãoAbstractThis is the first review to present data obtained in Brazil over the years regarding contaminants of emerging concern (CEC) and to contrast it with contamination in other countries. Data gathered indicated that caffeine, paracetamol, atenolol, ibuprofen, cephalexin and bisphenol A occur in the μg L−1 range in streams near urban areas. While endocrine disruptors are frequently detected in surface waters, highest concentrations accoun...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Effects of soil acidification on the toxicity of organophosphorus pesticide on Eisenia fetida and its mechanism
Publication date: Available online 26 April 2018Source: Journal of Hazardous MaterialsAuthor(s): Xiaoming Zou, Xiaoyu Xiao, Hanfeng Zhou, Feng Chen, Jianjun Zeng, Wenbiao Wang, Guangping Feng, Xiangfeng HuangAbstractOrganophosphorus pesticides (OPs) have been widely used to control agricultural insects. Soil acidification is a major problem in soil of intensive agricultural systems, especially in red soil with a low pH buffer capacity. However, the effects of soil acidification on the toxicity of pesticides are still unclear. In the present study, the toxicity of three OPs on E. fetida was determined at individual (14-day ...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Electrodialytic 2-compartment cells for emerging organic contaminants removal from effluent
Publication date: Available online 27 April 2018Source: Journal of Hazardous MaterialsAuthor(s): Ana Rita Ferreira, Nazaré Couto, Paula Guedes, Joana Pinto, Eduardo P. Mateus, Alexandra B. RibeiroAbstractThe present work discusses the efficiency of the electrodialytic (ED) process to remove emerging organic contaminants (EOCs) from effluent. The ED process was carried out in a cell of two-compartments (2 C-cell) with effluent in either the anode or cathode compartment, separated from the electrolyte compartment through an anion or a cation exchange membrane (AEM and CEM, respectively). As effluent destination migh...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Identifying the gaps: Resources and perspectives on the use of nuclear receptor based-assays to improve hazard assessment of emerging contaminants
Publication date: Available online 30 April 2018Source: Journal of Hazardous MaterialsAuthor(s): M.M. Santos, R. Ruivo, A. Capitão, E. Fonseca, L.F.C. CastroAbstractBiological control of key processes, such as development and reproduction, is largely ascribed to a superfamily of ligand-dependent and independent transcription factors named Nuclear Receptors (NRs). Given their ability to accommodate ligands, NRs are prime targets of man-made compounds that mimic or antagonise the action of endogenous ligands. Accordingly, NRs occupy a prominent role in OECD and EPA guidelines for testing and assessment of Endocrine di...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Anaerobic biodegradation of pharmaceutical compounds coupled to dissimilatory manganese (IV) or iron (III) reduction
This study indicates that anaerobic pharmaceutical biodegradation coupled to dissimilatory Mn(IV) or Fe(III) reduction is possible, and promising for application to cleaning wastewater treatment plant effluents.Graphical abstract (Source: Journal of Hazardous Materials)
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Silver-functionalized silica aerogels and their application in the removal of iodine from aqueous environments
Publication date: Available online 1 May 2018Source: Journal of Hazardous MaterialsAuthor(s): R. Matthew Asmussen, Josef Matyáš, Nikolla P. Qafoku, Albert A. KrugerAbstractOne of the key challenges for radioactive waste management is the efficient capture and immobilization of radioiodine, because of its radiotoxicity, high mobility in the environment, and long half-life (t1/2 = 1.57 × 107 years). Silver-functionalized silica aerogel (AgAero) represents a strong candidate for safe sequestration of radioiodine from various nuclear waste streams and subsurface environments. Batch sorption experime...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Liquid chromatography-mass spectrometry-based metabolomics and lipidomics reveal toxicological mechanisms of bisphenol F in breast cancer xenografts
Publication date: Available online 5 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Chao Zhao, Peisi Xie, Hailin Wang, Zongwei CaiAbstractBisphenol F (BPF) is a major alternative to bisphenol (BPA) and has been widely used. Although BPA exposure is known to generate various toxic effects, toxicity of BPF remains under-explored. A comprehensive method involving mass spectrometry (MS)-based global lipidomics and metabolomics, and matrix-assisted laser desorption/ionization-mass spectrometry (MALDI)- MS imaging (MSI) was used to study toxic effects of BPF and the underlying mechanisms on tumor metastasis-related tis...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Role of reactive oxygen species on the activity of noble metal-doped TiO2 photocatalysts
Publication date: Available online 15 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Paula Ribao, Juan Corredor, Maria J. Rivero, Inmaculada OrtizAbstractModified TiO2 catalysts are of interest in environmental water remediation since they can lead to efficient electron-hole separation and greatly enhance the photocatalytic properties of TiO2. Reactive oxygen species (ROS), such as the superoxide radical (O2−), hydroxyl radical (OH), and positive valence band holes (h+VB), have been reported as the main oxidative species involved in photocatalytic degradation processes. In this work, the role of these speci...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Identification of algal growth inhibitors in treated waste water using effect-directed analysis based on non-target screening techniques
The objective was to identify compounds responsible for the toxicity by combining state-of-the-art sampling, bioanalytical, fractionation and non-target screening techniques. Three fractionation steps of the whole extract were performed and bioactive fractions were analysed with GC (xGC)-MS and LC-HRMS. In total, 383 compounds were tentatively identified, and their toxicity was characterized using US EPA Ecotox database, open scientific literature or modelled by ECOSAR. Among the top-ranking drivers of toxicity were pesticides and their transformation products, pharmaceuticals (barbiturate derivatives and macrolide antibio...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Effect of long-term electrodialytic soil remediation on Pb removal and soil weathering
Publication date: Available online 17 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Gry Skibsted, Lisbeth M. Ottosen, Maria Elektorowicz, Pernille E. JensenAbstractWeathering of soil minerals during long-term electrochemical soil remediation was evaluated for two different soils: an industrially Pb contaminated soil with high carbonate content and an unpolluted soil with low carbonate content. A constant current of 5 mA was applied for 842 days, and sampling was made 22 times during the treatment. The overall qualitative mineral composition was unaffected by electrodialysis, except for calcite removal which wa...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Using CuO-MnOx/AC-H as catalyst for simultaneous removal of Hg° and NO from coal-fired flue gas
Publication date: Available online 24 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Bin Zhao, Honghong Yi, Xiaolong Tang, Qian Li, Dingding Liu, Fengyu GaoAbstractA series of CuO-MnOx modified catalysts were prepared, and proposed for simultaneous removal of Hg° and NO from flue gas. As Mn loading value was 5%, the high value of 90% Hg and 60% NOx were removed efficiently. With gradual increasing of reaction temperature, the mercury removal efficiency (Mercury RE) first increased to 92% then decreased slightly, while NOx removal efficiency (NOx RE) exhibited a trend of continuous increase. O2 had promotional...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Wicherhamomyces anomalus biofilm supported on wood husk for chromium wastewater treatment
Publication date: Available online 24 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Meryem Asri, Naïma El Ghachtouli, Soumya Elabed, Saad Ibnsouda Koraichi, Alae Elabed, Bruna Silva, Teresa TavaresABSTRACTA Wickeramomyces anomalus biofilm supported on wood husk was used to remediate water bodies contaminated with chromium (Cr), in batch and open systems. The favorable adhesion ability of the chromium-resistant yeast strain on the wood husk was predicted by XDLVO theory and confirmed by environmental scanning electronic microscopy. The chromium decontamination was then optimized in a batch mode using a centr...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Mechanism and kinetics of degrading aflatoxin B1 by salt tolerant Candida versatilis CGMCC 3790
Publication date: Available online 26 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Jianlong Li, Jun Huang, Yao Jin, Chongde Wu, Dazhan Shen, Suyi Zhang, Rongqing ZhouAbstactFour products were identified by liquid chromatography/time-of-flight mass spectrometry (LC/TOF-MS) for the degradation of aflatoxin B1 (AFB1) is by salt tolerant Candida versatilis CGMCC 3790 (C. versatilis CGMCC 3790), including Ⅱ (C14H10O4), Ⅲ (C14H12O3), Ⅳ (C13H12O2), Ⅴ (C11H10O4), which were not toxic. Based on these products, it is speculated that AFB1 degradation has two pathways. The degradation ratio of active cell component...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Plant tannin immobilized Fe3O4@SiO2 microspheres: A novel and green magnetic bio-sorbent with superior adsorption capacities for gold and palladium
Publication date: Available online 30 May 2018Source: Journal of Hazardous MaterialsAuthor(s): Ruiyi Fan, Huiyu Min, Xingxing Hong, Qingping Yi, Wei Liu, Qinglin Zhang, Zhengrong LuoAbstractIn this paper, a new core-shell nanostructured magnetic bio-based composite was prepared by immobilizing persimmon tannin (PT) onto Fe3O4@SiO2 microspheres, and the as designed Fe3O4@SiO2@PT was utilized for adsorptive recovery of Au(III) and Pd(II). The preparation, morphology, composition and magnetic property of Fe3O4@SiO2@PT were characterized. Adsorption parameters of Fe3O4@SiO2@PT towards Au(III) and Pd(II) including initial pH, r...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

The influence of Arsenic on the toxicity of carbon nanoparticles in bivalves
Publication date: Available online 2 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Rosa Freitas, Francesca Coppola, Lucia De Marchi, Valeria Codella, Carlo Pretti, Federica Chiellini, Andrea Morelli, Gianluca Polese, Amadeu M.V.M. Soares, Etelvina FigueiraAbstractAlthough an increasing number of studies have been published on the effects of emergent pollutants such as carbon nanoparticles, there is still scarce information on the impact of these contaminants on marine organisms when acting in combination with classical pollutants such as meta(loid)s. The present study evaluated the impacts of Arsenic and Multi-...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Electrochemical treatment of flutriafol wastewater using a novel 3D macroporous PbO2 filter: operating parameters, mechanism and toxicity assessment
Publication date: Available online 3 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Siqi Liu, Tao Cui, Anlin Xu, Weiqing Han, Jiansheng Li, Xiuyun Sun, Jinyou Shen, Lianjun WangAbstractIn order to break the high operating cost bottleneck of electrochemical treatment of aqueous flutriafol (FTF), an emerging fungicide, a novel three-dimensional ordered macroporous PbO2 (3DOM-PbO2) filter was designed to facilitate mass transfer. The effects of operating parameters, including current density, flow rate and initial concentration on FTF electrooxidation performance were investigated using conventional flat Ti/PbO2 (F...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Kinetics and mechanism of Paraquat’s degradation: UV-C photolysis vs UV-C photocatalysis with TiO2/SiC foams
In conclusion, these two different photo-degradation processes are able to remove paraquat and produce similar by-products. However, the kinetics of degradation is rather slow during photolysis and it is recommended to combine the UV-C lightning with a TiO2 photocatalyst to improve the mineralization rate. (Source: Journal of Hazardous Materials)
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Membrane bioreactors and electrochemical processes for treatment of wastewaters containing heavy metal ions, organics, micropollutants and dyes: Recent developments
Publication date: Available online 12 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Adewale Giwa, Abdallah Dindi, Joanna KujawaAbstractResearch and development activities on standalone systems of membrane bioreactors and electrochemical reactors for wastewater treatment have been intensified recently. However, several challenges are still being faced during the operation of these reactors. The current challenges associated with the operation of standalone MBR and electrochemical reactors include: membrane fouling in MBR, set-backs from operational errors and conditions, energy consumption in electrochemical sys...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Impact of preoxidation of UV/persulfate on disinfection byproducts by chlorination of 2,4-Di-tert-butylphenol
Publication date: Available online 19 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Qiongfang Wang, Yisheng Shao, Naiyun Gao, Wenhai Chu, Juxiang Chen, Xian Lu, Yanping Zhu, Na AnAbstractUV/persulfate (UV/PS) has been as an efficient method to remove many organic contaminants in water. However, little is known about the impact of UV/PS pretrement on the formation of disinfection byproducts (DBPs) during chlorination of 2,4-Di-tert-butylphenol (2,4-D). This research evaluated that UV/PS preoxidation of 2,4-D greatly decreased the DBPs generation during following chlorination. In the 2,4-D solution without any tr...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Removal of aqueous chromium and environmental CO2 by using photocatalytic TiO2 doped with tungsten
Publication date: Available online 20 June 2018Source: Journal of Hazardous MaterialsAuthor(s): M. Trejo-Valdez, S.R. Hernández Guzmán, M.E. Manriquez-Ramírez, H. Sobral, H. Martínez-Gutiérrez, C. Torres-TorresAbstractRemoval of hexavalent chromium was accomplished by using photocatalyst materials of TiO2 doped with tungsten oxide, environmental air as oxygen supply and white light as irradiation source. Dichromate anions in concentration ranges of 50 to 1000 µg/L were removed by means of aqueous dispersions of TiO2 doped with tungsten. The aqueous chromium analyses were performed...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Significant enhancement in hydrolytic degradation of sulfur mustard promoted by silver nanoparticles in the Ag NPs@HKUST-1 composites
Publication date: Available online 21 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Yanqin Li, Qi Gao, Yunshan Zhou, Lijuan Zhang, Yuxu Zhong, Ying Ying, Mingcai Zhang, Yanqin Liu, Yong’an WangAbstractThe Ag NPs@HKUST-1 composites have been successfully prepared with different loading amounts of silver nanoparticles in HKUST-1 featuring a three-dimensional system of channels constructed by benzene-1,3,5-tricarboxylate and dimeric cupric units by a simple one-pot hydrothermal method, and characterized by various microscopy and spectroscopy analysis techniques. The average particle size of Ag NPs increased ...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Innovative application for bauxite residue: red mud-based inorganic polymer spheres as pH regulators
In this study, and for the first time, red mud (RM)-based geopolymer spheres were synthesised, with varying porosity and RM content, and then their use as pH regulators was evaluated. The aluminosilicate sources of these inorganic polymers were 100 % waste-based, consisting of a mixture of RM and fly ash wastes. Geopolymer spheres containing up to 60 wt.% RM were successfully produced, while higher RM contents distorted the specimens’ spherical shape. Results showed that alkalis leaching from the spheres over time can be controlled by their porosity, while the RM content induces only minor changes to leaching. The ...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

The plasticity of indigenous microbial community in a full-scale heavy oil-produced water treatment plant
Publication date: Available online 23 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Xiaoyu Wang, Limin Jiang, Zhonghui Gai, Fei Tao, Hongzhi Tang, Ping XuAbstractIndigenous microbial communities are main and promising performers for bioremediation due to their excellent adaptability, degradation capability, and inherent plasticity. Treating heavy oil-produced water (HOPW) is a challenge owing to the high recalcitrance and heterogeneity of chemicals it contains. A full-scale HOPW treatment plant was built at a capacity of 10,000 m3/d with the indigenous microbial community. After the treatment, the outlet wate...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Regulation of clay particles charge for design of protective electrokinetic barriers
Publication date: Available online 23 June 2018Source: Journal of Hazardous MaterialsAuthor(s): V.A. Korolev, D.S. NesterovAbstractCoupled electrokinetic protective reactive barriers (PRB) are considered as a perspective technology for the treatment of contaminated groundwater. Design of PRB is directly connected with a problem of barrier material choice. Clays can be considered as an appropriate material due to high adsorptive properties and relative cheapness. The barrier internals are formed by clay surface charge properties. We revealed that acidic and alkaline treatment of clay is an effective way to affect its protec...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Polyvinyl acetate processing wastewater treatment using combined Fenton’s reagent and fungal consortium: Application of central composite design for conditions optimization
Publication date: Available online 24 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Khadija Ajmi, Elena Vismara, Imene Manai, Maroua Haddad, Moktar Hamdi, Hassib BouallaguiAbstractThe Fenton reaction as an oxidative degradation process was used for industrial chemical wastewater (ICW) pretreatment. The biodegradation of pretreated ICW was performed, in aqueous environment under aerobic condition, by a defined fungal consortium. The central composite design (CCD) was used to study the effect of nitrogen and phosphorus addition and the concentration of the pollution on the removal of polyvinyl alcohol (PVA) and o...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Multifunctional Photoactive and Selective Adsorbent for Arsenite and Arsenate: Evaluation of Nano Titanium Dioxide-Enabled Chitosan Cross-Linked with Copper
Publication date: Available online 24 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Lauren N. Pincus, Fjodor Melnikov, Jamila S. Yamani, Julie B. ZimmermanAbstractA novel multifunctional sorbent material of nano-titanium dioxide-enabled chitosan beads cross-linked with copper (CuTICB) is capable of photo-oxidation of As(III) to the less-toxic and more easily adsorbed As(V) in UV light and selective adsorption of arsenite (As(III)) and arsenate (As(V)) in the presence of phosphate, a strong adsorptive competitor and inhibitor of arsenic removal performance. CuTICB is an attractive sorbent as simultaneous photo-o...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Transient reactive transport model for physico-chemical transformation by electrochemical reactive barriers
In this study, the focus is to develop an efficient model for reactions associated with the transport and physico-chemical transformation in an electrochemical reactor. The model incorporates effects of transport mechanisms as well as chemical and electrochemical reactions. Model verification is provided for pH profiles under different electrolyte compositions in two sets of reactors; a batch and a flow-through reactor. The model is able to predict the concentration of species during the electrochemical remediation process with a close correlation to experimental data (R2 = 0.99 for batch and R2 = 0.78 for flow-thr...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Studies on mass production and highly solar light photocatalytic properties of gray hydrogenated-TiO2 sphere photocatalysts
Publication date: Available online 25 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Ha-Rim An, Yong Cheol Hong, Hyeran Kim, Jin Young Huh, Edmond Changkyun Park, So Young Park, Yesul Jeong, Ji-In Park, Jong-Pil Kim, Young-Chul Lee, Woong-Ki Hong, You-Kwan Oh, Youn Jung Kim, Minho Yang, Hyun Uk LeeAbstractIn this paper, it is first reported that gray hydrogenated TiO2 sphere photocatalysts (H-TiO2) with high reactivity to solar light are mass produced within a few minutes using an underwater discharge plasma modified sol-gel method at room temperature and atmospheric pressure. This plasma modified system is an e...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Three-Dimensional Hierarchical Porous Sludge-Derived Carbon supported on Silicon Carbide Foams as Effective and Stable Fenton-Like Catalyst for Odorous Methyl Mercaptan Elimination
Publication date: Available online 25 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Jingling Yang, Qing Zhang, Feng Zhang, Dehua Xia, Huadan Liu, Shuanghong Tian, Lianpeng Sun, Dong Shu, Chun He, Sabiha RunaABSTRACTThe poor reusability of catalysts and secondary pollution are critical issues for sulfur-containing volatile organic compounds (S-VOCs) removal. In this paper, a three-dimensional (3D) hierarchical porous sludge-derived carbon supported on silicon carbide foams (SiC) has been fabricated for deep decomposition of S-VOCs under ambient conditions. The sludge-derived Fenton-like catalyst has been confirm...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Reversible pH-dependent curium(III) biosorption by the bentonite yeast isolate Rhodotorula mucilaginosa BII-R8
Publication date: Available online 25 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Margarita Lopez-Fernandez, Henry Moll, Mohamed L. MerrounAbstractThis work describes the molecular characterization of the interaction mechanism of a bentonite yeast isolate, Rhodotorula mucilaginosa BII-R8, with curium(III) as representative of trivalent actinides and europium(III) used as inactive analogue of Cm(III). A multidisciplinary approach combining spectroscopy, microscopy and flow cytometry was applied. Time-Resolved Laser Induced Fluorescence Spectroscopy (TRLFS) analyses demonstrated that the biosorption of Cm(III) ...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

EDDS enhanced PCB degradation and heavy metals stabilization in co-contaminated soils by ZVI under aerobic condition
Publication date: Available online 25 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Menghua Cao, Shuxin Tu, Shuanglian Xiong, Haiyan Zhou, Jing Chen, Xiaohua LuAbstractIn the present study, biodegradable ligand EDDS was employed to assist ZVI on simultaneous remediation of PCB and heavy metals co-contaminated soils under aerobic condition. With addition of 4 mmol L-1 EDDS and 5 g L-1 ZVI, the total removal ratio of PCB reached 75.3%, and the stabilization ratio of Pb and Cu attained 97.1% and 91.9% respectively. EDDS played two key roles during the process. Firstly, the addition of EDDS could enhance hydr...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Graphene-synergized 2D covalent organic framework for adsorption: a mutual promotion strategy to achieve stabilization and functionalization simultaneously
Publication date: Available online 26 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Rui Wen, Yang Li, Meicheng Zhang, Xinghua Guo, Xing Li, Xiaofeng Li, Jun Han, Sheng Hu, Wang Tan, Lijian Ma, Shoujian LiAbstractMost of current absorbents are difficult to hold favorable stability and functionality simultaneously when used in condition of high acidity and strong radiation existing in nuclear industry. Herein, a new graphene-synergized 2D covalent organic framework (GS-COF) was obtained via an in-situ loading of a covalent organic framework (TDCOF) on graphene sheets based on a mutual promotion strategy proposed ...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Effect of imidazolium-based ionic liquids with varying carbon chain lengths on Arabidopsis thaliana: Response of growth and photosynthetic fluorescence parameters
Publication date: Available online 26 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Huijun Liu, Yilu Xia, Huiyang Fan, Qianru Xu, Shaoting Du, Zhiguo Fang, Huilong XiaAbstractAs green and novel solvents, ionic liquids (ILs) are popular in many industries, which may threaten ecosystems. The effects of three imidazolium-based ILs with different alkyl chain lengths, including 1-octyl-3-methylimidazolium chloride ([C8mim]Cl), 1-decyl-3-methylimidazolium chloride ([C10mim]Cl), and 1-dodecyl-3-methylimidazolium chloride ([C12mim]Cl) on growth and photosystem of Arabidopsis thaliana were investigated. Root length, fre...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Contributions of the microbial community and environmental variables to antibiotic resistance genes during co-composting with swine manure and cotton stalks
In this study, three levels of tylosin (25, 50, and 75 mg kg–1 on a dry weight basis) were added to swine manure plus a control, which was composted with cotton stalks. Each treatment was repeated in triplicate and the ARG profiles were determined with different levels of tylosin. The top 35 genera and ARGs profiles were clustered together based on the composting time. Combined composting parameters (temperature, pH, NH4+-N, NO3-N, and moisture content) accounted for 78.4% of the total variation in the changes in the potential host bacteria. In addition, the selected five composting parameters and six phyla (incl...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Pilot trial of detoxification of chromium slag in cyclone furnace and production of slag wool fibres
Publication date: Available online 28 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Guizhou Zhao, Lingling Zhang, Daqiang CangAbstractThe pilot trial of detoxification of chromium slag in cyclone furnace and production of slag wool fibres were investigated in a power plant in China. 10~30 wt.% chromium slag was mixed with pulverized coal and 0~10 wt.% limestone as the raw materials of the cyclone furnace. Cr(VI) in chromium slag was reduced to Cr2O3 inside the cyclone furnace at high temperature. The melt was then produced into slag wool fibres through high-speed centrifugation. Optimal fibres with shot con...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Application of a ceramic membrane contacting process for ozone and peroxone treatment of micropollutant contaminated surface water
This study investigates the performance of membrane-based ozonation or peroxone processes, regarding the transformation of carbamazepine (CBZ), benzotriazole (BZT), p-chlorobenzoic acid (pCBA) and atrazine (ATZ) in natural surface waters, as well as the formation of bromates. Ozonation performed with the use of ceramic membrane contactor was able to diminish CBZ concentration below 0.1 μM at 0.4 mg O3/mg DOC, i.e. presenting>90% removal rate, whereas the transformation of BZT, pCBA and ATZ was not exceeded 70%, 57% and 49%, respectively, under the same experimental conditions. The addition of H2O2 reduced the rem...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Catalytic removal of mercury from waste carbonaceous catalyst by microwave heating
Publication date: Available online 30 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Chao Liu, Jinhui Peng, Jian Liu, Ping Guo, Shixing Wang, Chenhui Liu, Libo ZhangAbstractWaste carbonaceous catalyst (WCC) from vinyl chloride monomer (VCM) production is a potential environmental threat due to the mercury toxicity. Microwave heating (MWH) was used to decontaminate WCC. Treatment temperature had a stronger influence on mercury removal than that of treatment time while mercury removal was highly depended on treatment time at lower temperature. When WCC was treated at 350 °C for 60 min, 400 °C for 30...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Analysis of air photocatalytic purification using a total hazard index: Effect of the composite TiO2/zeolite photocatalyst
Publication date: Available online 30 June 2018Source: Journal of Hazardous MaterialsAuthor(s): N.S. Kovalevskiy, M.N. Lyulyukin, D.S. Selishchev, D.V. KozlovAbstractThe TiO2 and composite TiO2/zeolite catalysts were investigated in the photocatalytic oxidation of model volatile organic compounds. The photocatalytic experiments were performed in a batch reactor using an FTIR in situ method for the detailed analysis of the reaction components in the gas phase. The kinetic data for the TiO2 and composite TiO2/zeolite photocatalysts were compared. A focus on the analysis of the total hazard of gas mixture during the process b...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Preparation and characterization of nanosilica copper (II) complexes of amino acids
Publication date: Available online 30 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Junfan Niu, Dong Guo, Wenbing Zhang, Jingyue Tang, Gang Tang, Jiale Yang, Weichen Wang, Hong Huo, Na Jiang, Yongsong CaoABSTRACTThe frequent use of traditional copper-based microbicides has led to the growing risk of toxicity to non-target organisms in the environment. In this work, nanosilica was conjugated with copper(II) complexes of L-glutamate (or glycine) to develop novel copper-based microbicides with good microbicidal activity, systemicity and desired safety to plant, and the obtained nanosilica-L-glutamate copper comple...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Self-mediated pH changes in culture medium affecting biosorption and biomineralization of Cd2+ by Bacillus cereus Cd01
In this study, Bacillus cereus Cd01 was selected to investigate effects of self-mediated pH on biosorption and biomineralization of Cd2+ in whole 72h cultivation period. Results revealed that strain Cd01-mediated pH decrease of the cultivation medium from 7.0 to 6.1 inhibited biosorption of Cd2+ on Cd01 cells at the initial cultivation period, while an increased pH from 6.1 to 7.4 facilitated biosorption of Cd2+ on Cd01 cells at the middle and late cultivation period. The reasons were mainly that self-mediated pH altered cell surface hydrophobicity and cell membrane fluidity of strain Cd01. Moreover, biosorption and bioacc...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Photochemical treatment of tyrosol, a model phenolic compound present in olive mill wastewater, by hydroxyl and sulfate radical-based advanced oxidation processes (AOPs)
Publication date: Available online 30 June 2018Source: Journal of Hazardous MaterialsAuthor(s): Melike Yalili Kilic, Wael H. Abdelraheem, Xuexiang He, Kadir Kestioglu, Dionysios D. DionysiouAbstractThe photochemical degradation and mineralization of tyrosol (TSL), a model phenolic compound present in olive mill wastewater, were studied by UV-254 nm irradiated peroxymonosulfate (PMS), hydrogen peroxide (H2O2) and persulfate (PS). Effects of initial TSL concentration, UV fluence, pH, phosphate buffer and presence of inorganic anions (i.e., Cl−, SO42− and NO3−) were also investigated. Sulfate and hydroxyl ...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Unveiling the Important Roles of Coexisting Contaminants on Photochemical Transformations of Pharmaceuticals: Fibrate Drugs as a Case Study
In this study, the roles of coexisting contaminants on the phototransformation of pharmaceuticals were unveiled with the fibrate drugs gemfibrozil (GMF), fenofibrate (FNF), and fenofibric acid (FNFA) as model compounds. GMF undergoes initial concentration dependent photodegradation due to the involvement of singlet oxygen (1O2) initiated self-sensitized photolysis, and undergoes pH dependent photodegradation due to dissociation and hydroxyl radical (•OH) generation. The decarboxylated intermediates of GMF and coexisting FNFA significantly accelerated the photodegradation of GMF. The promotional effects of the decarbox...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Novel ternary nanohybrids of tetraethylenepentamine and graphene oxide decorated with MnFe2O4 magnetic nanoparticles for the adsorption of Pb(II)
Publication date: Available online 2 July 2018Source: Journal of Hazardous MaterialsAuthor(s): Wenbin Xu, Yuan Song, Kang Dai, Shuai Sun, Guyue Liu, Junrui YaoAbstractNovel ternary nanohybrids, consisting of tetraethylenepentamine (TEPA), graphene oxide (GO) and manganese ferrite magnetic nanoparticles (TEPA-GO/MnFe2O4), were prepared by a facile hydrothermal method and utilized to remove Pb(II) from aqueous solution effectively. The adsorbents were characterized by SEM, TEM, XRD, FTIR, zeta potential analysis, magnetization hysteresis loop, BET and XPS. These nanoparticles exhibited superparamagnetic behavior as well as h...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Fe(III)-oxalate complex mediated phosphate released from diazinon photodegradation: Pathway signatures based on oxygen isotopes
In this study, the kinetics and mechanisms of diazinon photodegradation by Fe(III)–oxalate complex have been determined. Special attention was given to the pathway by which phosphate is released following diazinon photodegradation, as assessed by HPLC-ESI-Q/TOF-MS coupled with oxygen isotope. The results showed that diazinon was stable under dark treatment. However, the degradation of diazinon was observed in the UV-only, UV-Fe(III), and UV-Fe(III)-oxalate treatments. The degradation rate constant is the largest in the UV-Fe(III)-oxalate treatment and clearly influenced by the pH and Fe(III) / oxalate ratio. The hydr...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research

Assessing bioaccumulation behaviour of hydrophobic organic contaminants in a tropical urban catchment
Publication date: Available online 2 July 2018Source: Journal of Hazardous MaterialsAuthor(s): Qian Wang, Barry C. KellyAbstractThe bioaccumulation behaviour of halogenated flame retardant (HFRs), synthetic musks (SMs), organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in plankton, invertebrates and fish was assessed in an urban catchment in Singapore which is a tropical island country highly populated. The studied contaminants ranged widely in physical-chemical properties, with KOW values ranging between approximately 103–1011. BDE-47 and dechlorane plus (DPs) were the predominant HFRs, while gal...
Source: Journal of Hazardous Materials - July 12, 2018 Category: Environmental Health Source Type: research