The reduction of Cr(VI) to Cr(III) mediated by environmentally relevant carboxylic acids: State-of-the-art and perspectives
Publication date: 5 March 2019Source: Journal of Hazardous Materials, Volume 365Author(s): Bo Jiang, Yifan Gong, Jianan Gao, Tong Sun, Yijie Liu, Nihal Oturan, Mehmet A. OturanAbstractThe detoxification process mediated by carboxylic acids (CAs) has received considerable spotlights since CAs are clean reagent and ubiquitous in the natural environments and effluents. Here, we present an exhaustive review on surface-bound/dissolved metals-catalyzed Cr(VI) reduction by CAs and CAs-mediated Cr(VI) reduction by many highly/poorly reductive reagents. The overall mechanisms of Cr(VI) reduction are mainly associated with the coord...
Source: Journal of Hazardous Materials - November 14, 2018 Category: Environmental Health Source Type: research

Catalytic oxidation at pilot-scale: efficient degradation of volatile organic compounds in gas phase
In this study, a pilot-scale catalytic reactor was developed and the influence of process parameters on toluene degradation were investigated. Inlet gases were heated by electrical resistances and the catalyst employed was a honeycomb shape commercial automotive catalyst (Umicore, model AFT). Toluene degradation higher than 99 % was achieved for several conditions and temperature showed to be the most important process variable for it. For all concentrations, it was observed that when increasing temperature led to a decrease on the space time. At 800 ppmv, varying from 543 K to 633 K, the space time decreased...
Source: Journal of Hazardous Materials - November 12, 2018 Category: Environmental Health Source Type: research

A novel integrated biodegradation—Microfiltration system for sustainable wastewater treatment and energy recovery
Publication date: Available online 11 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Lalit Goswami, R. Vinoth Kumar, Kannan Pakshirajan, G. PugazhenthiAbstractThis work assessed the treatment of wastewater generated from three different industries viz., paper and pulp, biomass gasification and dairy by biodegradation followed by membrane filtration. Batch biodegradation was first carried out using wastewater as the potential substrate for oleaginous Rhodococcus opacus with lipid accumulation intracellular; subsequently, a microfiltration system was applied to recover the bacterial biomass grown as well as re...
Source: Journal of Hazardous Materials - November 12, 2018 Category: Environmental Health Source Type: research

Suppression effects of micro-fin surface on the explosive boiling of liquefied gas under rapid depressurization
Publication date: Available online 10 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Zhongdi Duan, Tao Ren, Guoliang DingAbstractThe boiling liquid expanding vapor explosion (BLEVE) is a most severe hazard in liquefied gas storage and transportation, and its prevention depends on the suppression of the explosive boiling during tank depressurization. This paper proposes an idea of using micro-fin type surface to suppress the explosive boiling, and experimentally investigates the suppression mechanisms and quantitative effects on the explosive boiling. In the experiments, the bubble behaviors on a micro-fin an...
Source: Journal of Hazardous Materials - November 12, 2018 Category: Environmental Health Source Type: research

Trace Element Mobility from Coal Combustion Residuals Exposed to Landfill Leachate
Publication date: Available online 10 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Linda Monroy Sarmiento, Justin G. Roessler, Timothy G. TownsendAbstractCoal combustion residuals (CCR) from energy generation may pose a risk to human health and the environment if not managed properly. Because of new regulations for the management of CCR, generators must dispose of these materials in lined landfill units similar to municipal solid waste (MSW) landfills. Generators could opt to construct dedicated units for CCR (monofilling) or by placing them in MSW landfills (co-disposal). The distinct chemical environment...
Source: Journal of Hazardous Materials - November 12, 2018 Category: Environmental Health Source Type: research

In vitro and in vivo studies of oxidative stress responses against acrylamide toxicity in zebrafish
Publication date: Available online 10 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Yuta Komoike, Masato MatsuokaAbstractAcrylamide (AA) is widely used in soil stabilization, water treatment, and industrial products and found in certain foods; however, its toxicity is an expanding global concern. Thus, to reveal the mechanisms involved in the development of, or protection from AA-induced toxicity has important significance. For this purpose, here we explored the intracellular stress response signaling pathways activated by AA exposure in zebrafish model. BRF41 cells derived from zebrafish were exposed to AA...
Source: Journal of Hazardous Materials - November 12, 2018 Category: Environmental Health Source Type: research

Ignition sensitivity and flame propagation of zirconium powder clouds
Publication date: Available online 8 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Yong Cao, Hao Su, Lifang Ge, Yuyan Li, Yongxu Wang, Lifeng Xie, Bin LiAbstractThe ignition sensitivity and flame propagation of zirconium powder clouds are investigated with the influence of initial turbulence. The effect of initial turbulence on the zirconium powder explosion is studied by the change of ignition delay time and dispersion pressure. Hartmann apparatus and Godbert-Greenwald furnace are used to evaluate the minimum ignition energy and minimum ignition temperature, respectively. The high-speed camera is used to a...
Source: Journal of Hazardous Materials - November 10, 2018 Category: Environmental Health Source Type: research

Recent history of persistent organic pollutants (PAHs, PCBs, PBDEs) in sediments from a large tropical lake
Publication date: Available online 6 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Jorge Feliciano Ontiveros-Cuadras, Ana Carolina Ruiz-Fernández, Joan Albert Sanchez-Cabeza, José Sericano, Libia Hascibe Pérez-Bernal, Federico Páez-Osuna, Robert B. Dunbar, David A. MucciaroneAbstract210Pb-dated sediment cores and surface sediments from Lake Chapala (LC), Mexico, were analyzed to assess the temporal trends in concentrations and fluxes of persistent organic pollutants (POPs: PAHs, PCBs and PBDEs). Total sediment concentrations of PAHs (95-1482 ng g-1), PCBs (9-27 ng g...
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

Role of Interfacial Reactions in Biodegradation: A Case Study in a Montmorillonite, Pseudomonas sp. Z1 and Methyl Parathion Ternary System
In this study, we constructed a ternary biodegradation system containing methyl parathion (MP), a bacterial strain of Pseudomonas sp. Z1 with capability of degrading MP and montmorillonite, which is a common clay mineral in soils. The role of interfacial reactions between montmorillonite and the MP degrader on the biodegradation of MP was investigated by batch adsorption as well as through semi-permeable membrane experiments. The contact between degrader and montmorillonite in biodegradation was also dynamically examined using in situ attenuated total reflectance Fourier transform infrared spectroscopy. The metabolic activ...
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

Development of an algal treatment system for selenium removal: Effects of environmental factors and post-treatment processing of Se-laden algae
Publication date: Available online 6 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Fang Liu, Jung-Chen Huang, Chuanqi Zhou, Wenqiao Gao, Shaofeng Xia, Shengbing He, Weili ZhouAbstractIn developing an algal treatment system, selenium (Se) removal efficiency by Chlorella vulgaris was evaluated under various conditions such as Se concentration, algal density, temperature and pH. A maximum removal efficiency plateau of ~90% was observed between 1000-3000 µg Se/L while the tolerance of Se toxicity was found at 6000 µg Se/L. C. vulgaris of 0.75 g DW/L showed the highest removal ef...
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

Integrated approach to enhance the anaerobic biodegradation of benz[α]anthracene: A high-molecule-weight polycyclic aromatic hydrocarbon in sludge by simultaneously improving the bioavailability and microbial activity
Publication date: Available online 6 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Jingyang Luo, Lijuan Wu, Yinguang Chen, Leiyu Feng, Jiashun CaoAbstractThe biodegradation of benz[α]anthracene (BaA), which was a high-molecule-weight PAH, was enhanced via a combination of alkaline and alkyl polyglucosides (APG) treatment during waste activated sludge (WAS) anaerobic fermentation. The biodegradation efficiency of BaA was increased from 14.1% in the control to 30.2 and 47.8% in pH 10 and pH 10 & APG reactors, respectively. Mechanism investigations found that the alkaline and APG treatments stimulate...
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

Peroxydisulfate Chemistry in the Environmental Literature: a Brief Critique
Publication date: Available online 6 November 2018Source: Journal of Hazardous MaterialsAuthor(s): E.J. Behrman (Source: Journal of Hazardous Materials)
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

MIL-PVDF blend ultrafiltration membranes with ultrahigh MOF loading for simultaneous adsorption and catalytic oxidation of methylene blue
In conclusion, this study sheds new light on the preparation strategy for multifunctional blend ultrafiltration membranes with ultrahigh particles loading displaying high decontamination and permeability performance.Graphical abstract (Source: Journal of Hazardous Materials)
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

The capability of commercial CFD code to predict organic peroxide fireball characteristics
Publication date: Available online 7 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Paul Blankenhagel, Klaus-Dieter Wehrstedt, Kirti Bhushan Mishra, Jörg SteinbachAbstractFireballs of liquid organic peroxides differ from those of liquid hydrocarbon fuels. Modified equations for predicting the fireball diameter, height, surface emissive power and the duration in dependence of the fuel mass are presented for di-tert-butyl peroxide. They base on 13 steel drum tests with fuel masses from 10 kg to 168 kg. Moreover, computational fluid dynamics simulations are performed using the laminar flamelet approach and...
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

Thermally and photocatalytically active multifunctional porous coatings for high temperature applications
In this study, the thermal catalytic powder mixtures of Mn, Ce and Co oxides supported on Al2O3 were synthesized. In order to obtain thermally active porous coating on the steel substrate, a binder solution produced via sol-gel method was used to bind the synthesized powder. Additionally by incorporation of TiO2 nanoparticles to previously described thermally active coating, both thermally and photocatalytically active multifunctional surfaces were obtained. The self-cleaning property and the rate of volatile organic compounds (VOC) degradation of the coatings were studied, in which pyrazine, thiazole, maltol, vanillin and...
Source: Journal of Hazardous Materials - November 8, 2018 Category: Environmental Health Source Type: research

Peroxide-Treated Metal-Organic Framework Templated Adsorbents for Remediation of High Level Nuclear Waste
Publication date: Available online 5 November 2018Source: Journal of Hazardous MaterialsAuthor(s): James C. Gilhula, Jacob T. Patterson, Neil Williams, Ram Itani, Kathryn M.L. Taylor-Pashow, Carter W. AbneyAbstractRemediation of legacy nuclear waste is one of the greatest challenges faced by the US Department of Energy, with projected cleanup efforts requiring over five decades and hundreds of billions of dollars. New materials are necessary to accelerate waste processing, achieving time and financial savings. Herein we report a peroxide treatment to a Ti metal-organic framework (MOF) and related MOF-templated adsorbents. ...
Source: Journal of Hazardous Materials - November 6, 2018 Category: Environmental Health Source Type: research

Equilibrium and kinetic studies for silver removal from aqueous solution by hybrid hydrogels
Publication date: Available online 5 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Tran Thu Hong, Hirotaka Okabe, Yoshiki Hidaka, Kazuhiro HaraAbstractHybrid hydrogels were prepared by blending Carboxymethyl chitosan (CMCts), Carboxymethyl cellulose (CMC) with Sodium sulfonate styrene (SSS) by 60-kGy gamma rays. The prepared hydrogels were utilized as silver-ion (Ag) sorbent under non- and competitive cases. Batch adsorption experiments were conducted in functional conditions including contact time, ratios of (CMC:CMCts) and SSS, pH value, temperature and adsorbent weight. Equilibrium contact time of 10&thi...
Source: Journal of Hazardous Materials - November 6, 2018 Category: Environmental Health Source Type: research

Low – cost multilayered green fiber for the treatment of textile industry waste water
Publication date: Available online 5 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Mary Lidiya Mathew, Akhil Gopalakrishnan, Charuvila T. Aravindakumar, Usha K. AravindAbstractLayer by layer (LbL) assembly can be regarded as an emerging technology for the separation of organic micro-pollutants from water. Direct assembly of polyelectrolytes (PEs) under LbL mode on natural support material is rare. Here we report the integration of LbL to one of the most resourceful support materials that might have an enduring impact on water treatment in color industry. A low-cost adsorbent is developed from chitosan (CHI)...
Source: Journal of Hazardous Materials - November 6, 2018 Category: Environmental Health Source Type: research

Zn adsorption onto Irish Fucus vesiculosus: Biosorbent uptake capacity and atomistic mechanism insights
This study presents a multifaceted approach of Zn adsorption onto dry Fucus vesiculosus originating from the Irish Sea. Metal chemistry as well as algae surface charge properties were characterized before adsorption. Zn adsorption tests were run as function of: pH, algae concentration and metal source. A comparison with Co, Cd, and Cu adsorption – in mono-ion solutions was also performed. Adsorption kinetics, fitted with pseudo-first order (PFO) and pseudo-second order (PSO) kinetic model, allowed the uptake parameters to be found and a comparison of kinetic rates. Synchrotron X-Ray-Florescence and X-Ray Absorption S...
Source: Journal of Hazardous Materials - November 6, 2018 Category: Environmental Health Source Type: research

Assessment of biodegradation of the anionic surfactant sodium lauryl ether sulphate used in two foaming agents for mechanized tunnelling excavation
The objective of this study was to assess SLES biodegradability in two commercial foaming agents (P1 and P2). Microcosm experiments were performed with two different soils collected from a tunnel construction site and conditioned with P1 or P2 (85.0 or 83.0 mg Kg-1 of SLES, respectively). At selected times soil samples were collected for assessing the SLES residual concentration using Pressured Liquid Extraction followed by methylene blue active substance analysis (MBAS). Simultaneously, soil microbial abundance (DAPI counts), viability (Live/Dead method), activity (dehydrogenase analysis) and phylogenetic st...
Source: Journal of Hazardous Materials - November 4, 2018 Category: Environmental Health Source Type: research

Profiling of intracellular and extracellular antibiotic resistance genes in tap water
This study suggested that eARG and iARG pollution of drinking water systems pose a potential risk to human public health. (Source: Journal of Hazardous Materials)
Source: Journal of Hazardous Materials - November 4, 2018 Category: Environmental Health Source Type: research

Efficiency and mechanism of atenolol decomposition in Co-FeOOH catalytic ozonation
Publication date: Available online 3 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Zhenzhen Xu, Meiling Xie, Yue Ben, Jimin Shen, Fei Qi, Zhonglin ChenAbstractCo-incorporated α-FeOOH nanocrystal (Co-FeOOH) was synthesized and applied for the ozonation of atenolol (ATL) in water. The compound was characterized and recognized as a transitional structure from FeOOH to CoFeO4. The presence of Co-FeOOH was observed to support the formation of •OH by promoting ozone decomposition, and the degradation of ATL and TOC was significantly improved during the catalytic ozonation. Catalytic reactions were rati...
Source: Journal of Hazardous Materials - November 4, 2018 Category: Environmental Health Source Type: research

Continuous removal of the model pharmaceutical chloroquine from water using melanin-covered Escherichia coli in a membrane bioreactor
Publication date: Available online 29 October 2018Source: Journal of Hazardous MaterialsAuthor(s): Magnus Lindroos, David Hörnström, Gen Larsson, Martin Gustavsson, Antonius J.A. van MarisAbstractEnvironmental release and accumulation of pharmaceuticals and personal care products is a global concern in view of increased awareness of ecotoxicological effects. Adsorbent properties make the biopolymer melanin an interesting alternative to remove micropollutants from water. Recently, tyrosinase-surface-displaying Escherichia coli was shown to be an interesting self-replicating production system for melanin-covered ce...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Biochar-mediated sorption of antibiotics in pig manure
Publication date: Available online 29 October 2018Source: Journal of Hazardous MaterialsAuthor(s): A.N. Ngigi, Y.S. Ok, S. Thiele-BruhnAbstractUsing manure contaminated with antibiotics as fertilizer is a primary source of soil pollution with antibiotics and concomitantly with antibiotic resistance genes (ARG). Bioavailable antibiotics trigger further ARG amplification during manure storage. Consequently it is aimed to facilitate the immobilization of antibiotics in manure. To this end, five biochars derived from pine cone (BCP), rice husk, sewage sludge, digestate and Miscanthus were tested as additional sorbents in liqui...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Grain size distribution and exposure evaluation of organophosphorus and brominated flame retardants in indoor and outdoor dust and PM10 from Chengdu, China
Publication date: Available online 29 October 2018Source: Journal of Hazardous MaterialsAuthor(s): Mengqin Chen, Jingyan Jiang, Zhiwei Gan, Yan Yan, Sanglan Ding, Shijun Su, Xiaoming BaoAbstractTo investigate overall pollution and potential risk of 32 targets (11 PBDEs, 8 NBFRs, and 13 OPFRs) in indoor and outdoor environments, dust and PM10 samples were sampled from non-occupational and occupational zones in Chengdu, China. ∑Cl-OPFRs, BDE-209, and DBDPE were the dominant constitutes in both the non-occupational and occupational dust. Regarding the PM10, no significant differences were found between the kitchen and the...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Optimization of Direct Blue-14 Dye Degradation by Bacillus fermus (Kx898362) an Alkaliphilic Plant Endophyte and Assessment of Degraded Metabolite Toxicity
Publication date: Available online 29 October 2018Source: Journal of Hazardous MaterialsAuthor(s): N. Neetha J., Sandesh K., Girish Kumar K., Chidananda B., Ujwal P.AbstractAlkaliphilic bacteria possesses the ability to survive in the extreme conditions with high salt concentrations. The adaptability of alkaliphilic bacteria to extreme conditions has made them predominant degrader in the field of biodegradation. A moderately alkaliphilic endophyte was isolated from Centella asiatica with a potential to degrade a di-azo dye Direct Blue-14(DB-14). The isolate was identified as Bacillus fermus with 97% similarity strain Xmb06...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Adsorption of Sr(II) from water by mercerized bacterial cellulose membrane modified with EDTA
Publication date: Available online 29 October 2018Source: Journal of Hazardous MaterialsAuthor(s): Rong Cheng, Mi Kang, Shuting Zhuang, Lei Shi, Xiang Zheng, Jianlong WangAbstractThe treatment of low-level radioactive wastewater is a critical and considerable challenge. Bacterial cellulose membrane (BCM) modified with ethylenediaminetetraacetic acid (EDTA) using (3-aminopropyl) triethoxysilane (APTES) as a crosslinker were used to remove Sr2+ in this work. SEM, XPS, and FTIR were used to characterize the morphology, structure, chemical shift, and functional groups of the as-prepared adsorbent. The synthesized BCM@APTES-EDT...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Resistance and resilience of representative low nucleic acid-content bacteria to free chlorine exposure
Publication date: Available online 29 October 2018Source: Journal of Hazardous MaterialsAuthor(s): Yuhao Song, Guannan Mao, Guanghai Gao, Mark Bartlam, Yingying WangAbstractTwo representative low nucleic acid-content (LNA) bacterial strains, Polynucleobacter sp. CB and Sphingopyxis sp. 15Y-HN, and two commonly used microbial indicators of drinking water disinfection efficiency, Escherichia coli and Pseudomonas aeruginosa, were used to investigate the effects of chlorine disinfection. LNA bacteria were found to be more tolerant than microbial indicator strains at the same free chlorine concentrations in batch experiments. T...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Removal of phenol and chlorine from wastewater using steam activated biomass soot and tire carbon black
This study aims to demonstrate a novel method for removing toxic chemicals using soot produced from wood and herbaceous biomass pyrolyzed in a drop tube reactor and tire pyrolytic carbon black. The influence of ash content, nanostructure, particle size, and porosity on the filter efficiency of steam activated carbon materials was studied. It has been shown for the first time that steam activated soot and carbon black can remove phenol and chloride with the filter efficiencies as high as 95 %. The correlation of the filter efficiency to material properties showed that the presence of alkali and steam activation time we...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Neurotoxin BMAA and its isomeric amino acids in cyanobacteria and cyanobacteria-based food supplements
Publication date: Available online 30 October 2018Source: Journal of Hazardous MaterialsAuthor(s): Korina Manolidi, Theodoros M. Triantis, Triantafyllos Kaloudis, Anastasia HiskiaAbstractCyanobacteria are photosynthetic microorganisms distributed globally in aquatic and terrestrial environments. They are also industrially cultivated to be used as dietary supplements, as they have a high nutritional value; however, they are also known to produce a wide range of toxic secondary metabolites, called cyanotoxins. BMAA (β-methylamino-L-alanine) and its most common structural isomers, DAB (2,4-diaminobutyric acid) and AEG (N...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Intra-NAPL Diffusion and Dissolution of a MGP NAPL Exposed to Persulfate in a Flow-Through System
Publication date: Available online 1 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Saeid Shafieiyoun, Neil R. ThomsonAbstractIntra-NAPL diffusion is a critical process that can influence NAPL/water mass transfer. A series of physical model experiments was performed to investigate the role of intra-NAPL diffusion on the transient dissolution of a complex multicomponent NAPL subjected to persulfate treatment. To support these observations, a diffusion-based model was developed and calibrated using the experimental data. The experimental results indicated that while persulfate was able to completely degrade di...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Rapid depressurization and phase transition of CO2 in vertical ducts – small-scale experiments and Rankine-Hugoniot analyses
This study discusses the rapid expansion and phase transition of liquefied carbon dioxide (CO2) in vertical ducts. Results from small-scale experiments in three test setups (A, B, and C) were compared with a Rankine-Hugoniot model that treats the phase transition as an adiabatic evaporation wave of constant thickness. The model calculates the fluid properties behind the evaporation wave. The motivation was to identify hazards and quantify the energy-release in tank explosions such as a boiling liquid expanding vapor explosion. The experimental results corresponded with a Chapman Jouguet (CJ) solution. The contributions inc...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Efficiently Capturing Tobacco Specific Nitrosamines with Hβ Zeolite in Solution
Publication date: Available online 1 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Chun Ling Shi, Xiao Dan Sun, Yi Han Gao, Sai Jing Zheng, Shuo Hao Li, Jing Yang, Yang Zhong Wang, Jun-Wei Xiong, Yi Shen, Ying Wang, Jian Hua ZhuAbstractThe high-efficiency capture of Tobacco Specific Nitrosamines by Hβ zeolite in solution is reported for the first time, along with the adsorption of 4-methylnitrosamino-1-3-pyridyl-1-butanone in aqueous solution. Different from other zeolites such as NaZSM-5, the specific pore size of Hβ exerted a crucial function endowing the zeolite a higher removal of TSNA and sel...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Flame Retardant Vinylon/Poly(m-phenylene isophthalamide) Blended Fibers with Synergistic Flame Retardancy for Advanced Fireproof Textiles
This study provides a simple and effective strategy to improve the flame retardancy of textiles through a synergistic effect between the blended fibers, and a system with synergistic in flame retardant vinylon (FRV)/poly(m-phenylene isophthalamide) (PMIA) blended fibers is discovered. The FRV/PMIA 50/50 exhibits a much higher time to ignition and a lower peak heat release rate than those of the neat components, indicating a synergistic flame retardancy between constituents. The corresponding mechanism is explored. The residual char layer formed by blended fibers connects together and keeps the original fiber shape, which a...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Enhanced visible-light activation of persulfate by Ti3+ self-doped TiO2/graphene nanocomposite for the rapid and efficient degradation of micropollutants in water
In this study, a novel TiO2-x/rGO-PS-Vis process was developed, which utilizes the TiO2-x/rGO (Ti3+ and oxygen vacancies self-doped TiO2 coupled with reduced graphene oxide) nanocomposite as a promising and efficient activator of persulfate (PS) for the enhanced oxidation of micropollutants under visible -light irradiation. TiO2-x/rGO exhibited a significantly high activity for PS activation to produce more sulfate radicals (SO4•-) and hydroxyl radicals (•OH). Therefore, almost 100% BPA (10 mg/L) and 80% TOC can be removed just within 12 min with 1.0 g/L TiO2-x/rGO and 2 mM PS under vi...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Wetland plant microbial fuel cells for remediation of hexavalent chromium contaminated soils and electricity production
In this study, we evaluate the potential of PMFC systems to remediate soils polluted by Cr(VI). We compare different plants and different electrode materials with regard to their electricity generation and Cr(VI) removals under different soil Cr(VI) concentrations. In PMFC systems, the soil pH was transformed from slightly acidic to neutral, and the electrical conductivity was reduced during operation. The removal efficiency of Cr(VI) in soils could reach 99%, and the total Cr of soils could also be reduced. The closed circuit voltage of PMFC systems of Chinese pennisetum using the graphite carbon felt as the electrodes co...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Efficient removal of zinc from water and wastewater effluents by hydroxylated and carboxylated carbon nanotube membranes: Behaviors and mechanisms of dynamic filtration
Publication date: Available online 1 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Sharafat Ali, Syed Aziz Ur Rehman, Izaz Ali Shah, Muhammad Usman Farid, Alicia Kyoungjin An, Haiou HuangAbstractIn this work, a bench scale study was designed to investigate the removal of zinc (Zn2+) and regeneration efficiencies of functionalized-MWCNT (f-MWCNT) membranes. The f-MWCNTs were incorporated into polyvinylchloride (PVC) hollow fiber membranes (HFMs), which acted as a substrate and a barrier for MWCNTs leaching to water. The results revealed that the removal capacity of Zn2+ through f-CNT membranes were above 98%...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Co-immobilization of laccase and ABTS onto novel dual-functionalized cellulose beads for highly improved biodegradation of indole
Publication date: Available online 1 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Gu yaohua, Xue ping, Jia feng, Shi kerenAbstractThe method developed in this work, for the first time, for the co-immobilization of mediator 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and laccase, in which the dual-functionalized cellulose beads with network pore structure were constructed by polydopamine (PD) and polymeric glycidyl methacrylate (GMA) to obtain the biocatalyst co-immobilizing ABTS and laccase. ABTS molecules were encapsulated into the dual-functionalized cellulose beads to obtain an effici...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

A green approach to fabricating nacre-inspired nanocoating for super-efficiently fire-safe polymers via one-step self-assembly
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Huali Xie, Xuejun Lai, Yanlin Wang, Hongqiang Li, Xingrong ZengAbstractDeveloping a high efficient, environmental-friendly and universal fire-safe strategy for combustible polymers is crucial but challengeable. Inspired by nacre, we developed a super-efficiently fire-safe nanocoating based on carboxymethyl chitosan (CCS) and modified montmorillonite (MMT) via one-step self-assembly. The nanocoating possessed well-arranged nacre-like hierarchical microstructure, exhibiting high transparency and specific nacre-like iridescence....
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Organophosphorus Hydrolase-Poly-β-Cyclodextrin as a Stable Self-Decontaminating Bio-catalytic Material for Sorption and Degradation of Organophosphate Pesticide
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Youngkwang Moon, Ali Turab Jafry, Soon Bang Kang, Jin Young Seo, Kyung-Youl Baek, Eui-Joong Kim, Jae-Gu Pan, Jae-Youl Choi, Hyunji Kim, Kang Han Lee, Keunhong Jeong, Seunghan Shin, Jinkee Lee, Yongwoo LeeABSTRACTA region suffering from an attack of a nerve agent requires not only a highly sorptive material but also a fast-acting catalyst to decontaminate the lethal chemical present. The product should be capable of high sorptive capacity, selectivity and quick response time to neutralize the long lasting harmful effects of ne...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Experimental and numerical simulation study of the thermal hazards of four azo compounds
This study employed an innovative approach to determine the specific thermal reactions and decomposition hazard profiles of azos. Four typical azos (AIBN, AMBN, ABVN, and AIBME) were assessed using three thermal calorimetry techniques, and results were subsequently analyzed using a nonlinear optimization model. Thermal hazard analysis of small-scale experiments indicated that AIBN had a heat decomposition of 1247 J/g and a maximum pressure increase of 367 psig and thus exhibited more hazardous characteristics than did AMBN, ABVN, and AIBME. This study also obtained the relevant process safety parameters, time...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Selective removal of nicotine from the main stream smoke by using a surface-imprinted polymer monolith as adsorbent
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): X.H. Huang, J.J. Song, H. Li, M.T. Gong, Y. ZhangAbstractUsing molecularly imprinted polymer as a selective adsorbent for gaseous toxicants is a novel attempt. In present work, a nicotine surface-imprinted monolith (MIM) was used for the selective removal of nicotine from smoke. First, the retention capacity and selectivity for this MIM was tested by using it as the stationary phase in gas chromatography and chromatographic conditions optimized. Then, the gas phase adsorption isotherms of MIM were constructed and the adsorpti...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Novel synthesis of Bi-Bi2O3-TiO2-C composite for capturing iodine-129 in off-gas
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Hao Zou, Facheng Yi, Mianxin Song, Xiaoqiang Wang, Liang Bian, Weimin Li, Ning Pan, Xiaoqiang JiangAbstractThe Bi-Bi2O3-TiO2-C composites were prepared by a sol-gel method and investigated for capturing iodine-129 (129I) in off-gas producing from spent fuel reprocessing. Firstly, the optimal process conditions were operated through the orthogonal experiments, showing that the capturing capacity of the optimal composite was calculated about 504.0±19.5 mg/g, which is approximately 2.0-fold higher than that of the commerc...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Degradation of diclofenac using palladized anaerobic granular sludge: Effects of electron donor, reaction medium and deactivation factors
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Xiangchun Quan, Xinrui Wang, Yue Sun, Wanlin Li, Liang Chen, Jinbo ZhaoAbstractBiogenic nanopalladium (Bio-Pd) was formed by Anaerobic Granular Sludge (AGS). The Bio-Pd hosted in AGS (Pd-AGS) was used to degrade a pharmaceutical compound diclofenac (DCF) under the conditions of various electron donors, Pd loadings and reaction media. Results showed that hydrogen was the most effective electron donor for the Pd-AGS, followed by formate, glucose and acetate. The Pd-AGS was able to produce effective hydrogen/electron donors from...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Bio-inspired hollow PDMS sponge for enhanced oil–water separation
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Jung Hwal Shin, Jun-Ho Heo, Seunggyu Jeon, Jeong Hun Park, Suhyeon Kim, Hyun-Wook KangAbstractOil spills from disasters such as the sinking of ships and the discharge of oily wastes cause serious environmental problems. Polydimethylsiloxane(PDMS) sponges are valuable tools for isolating spilled oil. Here, we propose new PDMS sponges with bio-inspired design and enhanced absorption capacities. 3D printing was used to produce templates having negative designs, and after being filled with PDMS, the templates were selectively dis...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Removal of imidazolium-based ionic liquid by coupling Fenton and biological oxidation
Publication date: Available online 2 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Esther Gomez-Herrero, Montserrat Tobajas, Alicia Polo, Juan J. Rodriguez, Angel F. MohedanoAbstractIn this work, we assessed the potential of combining Fenton´s reagent and biological oxidation for removing the imidazolium-based ionic liquid 1-Ethyl-3-methylimidazolium chloride (EmimCl). Fenton-like oxidation was conducted at variable H2O2 doses from 20 to 100% the stoichiometric value as calculated from the theoretical chemical oxygen demand (COD). The stoichiometric H2O2 dose afforded Total Organic Carbon (TOC) conver...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Non-uniform Filtration Velocity of Process Gas Passing through a Long Bag Filter
Publication date: Available online 3 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Sangcheol Park, Yun Haeng Joe, Joonmok Shim, Hyunseol Park, Weon Gyu ShinABSTRACTFiltration velocity is one of the dominant parameters that determine the pressure drop through a bag filter. Experimental investigation of the air flow pattern around a bag filter inside a bag house is very difficult because of the complexity of the 3-D air flow. For this reason, we numerically investigated flow characteristics along a bag filter in detail. We newly found that the filtration velocity is non-uniform along the axial direction of a ...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Evaluation of floor-wise pollution status and deposition behavior of potentially toxic elements and nanoparticles in air conditioner dust during urbanistic development
Publication date: Available online 3 November 2018Source: Journal of Hazardous MaterialsAuthor(s): Muhammad Ubaid Ali, Guijian Liu, Balal Yousaf, Habib Ullah, Samina Irshad, Rafay Ahmed, Mudassar Hussain, Audil RashidAbstractThe study was undertaken to investigate deposition behaviors of various size-segregated particles and indoor air quality using dust accumulated on the air conditioner filter acting as a sink for PTEs and nanoparticles that can pose a significant health risk. However, the particulate matter size and chemical composition in AC dust and its relationship with PTEs remains uncertain. Current study aims to i...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Highly efficient degradation of 2,4-dichlorophenol over CeO2/g-C3N4 composites under visible-light irradiation: Detailed reaction pathway and mechanism
Publication date: 15 February 2019Source: Journal of Hazardous Materials, Volume 364Author(s): Muhammad Humayun, Zhewen Hu, Abbas Khan, Wei Cheng, Yang Yuan, Zhiping Zheng, Qiuyun Fu, Wei LuoAbstractHerein, we report for the first time the highly efficient degradation of 2,4-dichlorophenol (2,4-DCP) over CeO2/g-C3N4 composites (xCeO/CN) prepared via wet-chemical solution method. It is shown that the resultant nanocomposites with a proper mass ratio percentage (15%) of CeO coupled exhibit greatly enhanced visible-light activity for 2,4-dichlorophenol (2,4-DCP) degradation compared to the bare g-C3N4. From photoluminescence ...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research

Biochar combined with polyvalent phage therapy to mitigate antibiotic resistance pathogenic bacteria vertical transfer risk in an undisturbed soil column system
Publication date: 5 March 2019Source: Journal of Hazardous Materials, Volume 365Author(s): Mingming Sun, Mao Ye, Zhongyun Zhang, Shengtian Zhang, Yuanchao Zhao, Shaopo Deng, Lingya Kong, Rongorng Ying, Bing Xia, Wentao Jiao, Jiaqi Cheng, Yanfang Feng, Manqiang Liu, Feng HuAbstractThe vertical migration of antibiotic resistance pathogenic bacteria (ARPB) and antibiotic resistance genes (ARGs) in the surface soil-vadose soil system has become a new threat to ecological safety and public health; there is an imperative need to develop an efficient technique for targeted control and inactivation of ARPB in these systems. In thi...
Source: Journal of Hazardous Materials - November 3, 2018 Category: Environmental Health Source Type: research