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Total 409123 results found since Jan 2013.
Monitoring effects of hydrodynamic cavitation pretreatment of sodium oleate on the aggregation of fine diaspore particles through small-angle laser scattering
In this study, the aggregation of fine diaspore particles was comparatively investigated in sodium oleate (NaOl) solutions with and without HC pretreatment through the small-angle laser scattering (SALS) technique in a shear-induced aggregation (SIA) system. Results showed that HC pretreatment caused the formation of bulk nanobubbles (BNBs), which significantly modified the particle interactions and thereby modified the size and mass fractal dimension (Df) of aggregates under different SIA conditions. Although HC pretreatment did not noticeably alter the gradual change trend of aggregate size and structure characteristics ...
Source: Ultrasonics Sonochemistry - September 21, 2023 Category: Chemistry Authors: Weiguang Zhou Xinran Liu Yufeng Long Guangyuan Xie Yanfei Chen Source Type: research
Applications of covalent organic frameworks for the elimination of dyes from wastewater: A state-of-the-arts review
Chemosphere. 2023 Sep 19:140223. doi: 10.1016/j.chemosphere.2023.140223. Online ahead of print.ABSTRACTCovalent organic frameworks (COFs) are class of porous coordination polymers made up of organic building blocks joined together by covalent bonding through thermodynamic and controlled reversible polymerization reactions. This review discussed versatile applications of COFs for remediation of wastewater containing dyes, emphasizing the advantages of both pristine and modified materials in adsorption, membrane separation, and advanced oxidations processes. The excellent performance of COFs towards adsorption and membrane f...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Zakariyya Uba Zango Ayed M Binzowaimil Osamah A Aldaghri Mohamed Hassan Eisa Abdurrahman Garba Naser M Ahmed Jun Wei Lim Hui-Suan Ng Hanita Daud Khairulazhar Jumbri Kuan Shiong Khoo Khalid Hassan Ibnaouf Source Type: research
Investigation on Cr(VI)-bioreduction mechanism and reduction products by a novel Microbacterium sp. strain NEAU-W11
In this study, a novel Cr(VI)-reducing strain, Microbacterium sp. NEAU-W11, was reported, and its reduction mechanism was investigated. Microbacterium sp. NEAU-W11 could effectively degrade Cr(VI) under the conditions of pH 7-10, 15-35 °C, and the coexistence of metal pollutants such as Pb and Ni, etc. In addition, both Fe3+ and Cu2+ could improve the reducing ability of strain NEAU-W11, and glucose and lactose as electron donors also had promoting effect. Heat treatment of resting cells confirmed that chromium removal was not biological sorption but biological reduction. The active reductase of strain NEAU-W11 to chromiu...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Tingting Li Dandan Du Chenxu Li Junlei Zhao Lifeng Guo Xiangjing Wang Junwei Zhao Wensheng Xiang Source Type: research
Impact of lanadfill characteristics on the atmospheric exposure to halogenated flame retardants in gulls
The objective of this study was to investigate how atmospheric exposure in ring-billed gulls to PBDEs and other HFRs is influenced by selected landfill characteristics (i.e., daily cover materials, waste types and tonnage). Miniature passive air samplers (PASs) combined with GPS dataloggers were deployed for ten days during six years on the back of wild-caught ring-billed gulls breeding in the Montreal area. Atmospheric levels of several PBDEs and other HFRs determined in PASs were found to increase with the presence probability of gulls in the two largest landfills using automotive shredder residues as daily cover materia...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Ana ïs Kerric Marc J Mazerolle Manon Sorais Jean-Fran çois Giroux Jonathan Verreault Source Type: research
Advancing water treatment sustainability: Investigating electrified Ti < sub > 3 < /sub > C < sub > 2 < /sub > T < sub > x < /sub > composite membranes for minimizing microplastic fouling
This study illustrates the potential of MXene-based membranes for mitigating MP fouling and paves the way for future research on membrane materials that can enhance system performance.PMID:37734506 | DOI:10.1016/j.chemosphere.2023.140224
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Mariam Ouda Ravi P Pandey Fawzi Banat Shadi W Hasan Source Type: research
Complementarity of plasma and stool for the characterization of children's exposure to halogenated flame retardants: Update on analytical methods and application to a Canadian cohort
Chemosphere. 2023 Sep 19:140222. doi: 10.1016/j.chemosphere.2023.140222. Online ahead of print.ABSTRACTSixteen halogenated flame retardants including Polybrominated diphenyl ethers (PBDEs), Dechlorane-like compounds, and emerging halogenated flame retardants were measured in stool and plasma samples from children aged 8.9-13.8 years old. Samples were obtained from a Canadian cohort investigating the effect of contaminants on children's neurodevelopment in the Estrie region, Québec, Canada. The method for stool analysis developed for this study showed good recovery for all targeted compounds (73%-93%) with associated relat...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Guillaume Martinez Jiping Zhu Larissa Takser Andrea A Baccarelli Jean-Philippe Bellenger Source Type: research
Sustainable remediation of toxic Congo red dye pollution using bio based carbon nanocomposite: Modelling and performance evaluation
Chemosphere. 2023 Sep 19:140206. doi: 10.1016/j.chemosphere.2023.140206. Online ahead of print.ABSTRACTRemediation of synthetic dyes found in aqueous environment poses a serious challenge for treatment due to their resistance to chemical and biological degradation. This research study investigated the application of Chitosan-ZnO-Seaweed bio nanocomposite in the remediation of congo red. The novel bionanocomposite was characterised by FTIR, SEM, TEM, EDS and XRD studies. The FTIR spectra and SEM images indicated the adsorption of congo red onto the synthesized bionanocomposite. The batch wise experimental studies were done ...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Sarojini Gopalakrishnan Pownsamy Kannan Kuppusamy Balasubramani Natarajan Rajamohan Manivasagan Rajasimman Source Type: research
Microbial community and gene dynamics response to high concentrations of gadolinium and sulfamethoxazole in biological nitrogen removal system
Chemosphere. 2023 Sep 19:140218. doi: 10.1016/j.chemosphere.2023.140218. Online ahead of print.ABSTRACTThe impact of high antibiotic and heavy metal pollution levels on biological nitrogen removal in wastewater treatment plants (WWTPs) remains poorly understood, posing a global concern regarding the issue spread of antibiotic resistance induced by these contaminants. Herein, we investigated the effects of gadolinium (Gd) and sulfamethoxazole (SMX), commonly found in medical wastewater, on biological nitrogen removal systems and microbial characteristics, and the fate of antibiotic resistance genes (ARGs), metal resistance ...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Xinrui Yuan Kangping Cui Yihan Chen Yao Zhang Shiyang Wu Xianjin Xie Tong Liu Hongjia Yao Source Type: research
Performance of volatile fatty acids production from food waste at the presence of alkyl ethoxy polyglycosides and sodium dodecyl sulfate
This study investigated the performance of VFAs production from food waste at the presence of alkyl ethoxy polyglycosides (AEG) and sodium dodecyl sulfate (SDS). The highest yield of VFAs was obtained at 0.1 g AEG/g TS (14.53 g COD/L), which increased by 25.80% than the Blank. But inhibited phenomenon was observed at other reactors with relatively low yield and delayed fermentation time. The inhibition of lactate's production and bioconversion delayed the fermentation time, and SDS has changed the acidogenic fermentation type from lactate-butyrate fermentation to acetate fermentation. In addition, more organic matter disso...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Cui Quan Changxiang Chen Xinggang Li Ningbo Gao Source Type: research
The effects of Spinosad on zebrafish larvae and THP-1 cells: Associated with immune cell damage and NF-kappa B signaling pathway activation
This study has drawn attention to Spinosad-induced immunotoxicity.PMID:37734501 | DOI:10.1016/j.chemosphere.2023.140237
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Wei-Guo Wang Shou-Qian Xiong Jin Lu Lian-Hua Zhu Cheng Zhang Jia-Gao Cheng Zhong Li Wen-Ping Xu Li-Ming Tao Yang Zhang Source Type: research
Microplastics in wastewater treatment plants and their contributions to surface water and farmland pollution in China
This study examines the presence of MPs in sewage and sludge in Shenzhen WWTPs and estimates the annual mass loading of MPs from WWTPs to surface water and farmland soil in China. According to our results, for Shenzhen, the annual contribution of MPs from WWTPs (which was obtained by multiplying the annual treated sewage volume by the estimated MP density in the treated sewage) to surface water could be 70.6-302 tons. With a normalized extrapolation model of population density, the contribution of national urban WWTPs to MPs in surface water was estimated to be 734 -3.10 × 103 tons/year, of which 220-950 tons/year entered...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Shu-Yan Ren Qing Sun Shi-Yong Xia De Tong Hong-Gang Ni Source Type: research
Boron contamination and related health risk assessment in the soils collected from olive groves in İzmir province, Türkiye
In this study, it was aimed to determine the B pollution degree of the soils taken from the olive groves of İzmir province, which is approximately 180 km away from the B deposits in the Bigadiç district. In addition, the factors affecting boron adsorption and availability were discussed and the ecological and health risks of boron were evaluated. For this, soil samples were collected at depths of 0-30 cm from 118 olive groves and their B, Al, Fe, pH and organic matter contents were determined. The mean B content (47.08 mg/kg) of the study area was comparable to world-soil average B concentration (42 mg/kg). Also, B had a...
Source: Chemosphere - September 21, 2023 Category: Chemistry Authors: Memet Varol Ai şe Deliboran Halil Aytop Özgür Ateş Source Type: research
Design and Synthesis of a Library of C2-Substituted Sulfamidoadenosines to Probe Bacterial Permeability
Bioorg Med Chem Lett. 2023 Sep 19:129486. doi: 10.1016/j.bmcl.2023.129486. Online ahead of print.ABSTRACTAntibiotic resistance is a major threat to public health, and Gram-negative bacteria pose a particular challenge due to their combination of a low permeability cell envelope and efflux pumps. Our limited understanding of the chemical rules for overcoming these barriers represents a major obstacle in antibacterial drug discovery. Several recent efforts to address this problem have involved screening compound libraries for accumulation in bacteria in order to understand the structural properties required for Gram-negative...
Source: Bioorganic and Medicinal Chemistry Letters - September 21, 2023 Category: Chemistry Authors: Shibin Zhao Julian Maceren Mia Chung Samantha Stone Raphael Gei ßen Melissa S Boby Bradley S Sherborne Derek S Tan Source Type: research
Approximation of electrical double-layer thickness in hydrocarbon systems flowing through the pores of reservoir rocks
This article evaluates the effects of overlap of the diffuse layers in the narrow capillaries of the reservoir rock cores in oils. Methods were developed to estimate the double-layer thickness in hydrocarbon systems, and to predict the effects of double-layer overlap on the streaming current and hence on the calculation of surface potentials for flat-sided capillaries. These methods are used to interpret results from sandstone cores in crude oil and hydrocarbon solvents. The estimation of double-layer thickness in non-aqueous solvents on the basis of 1:1 charge carriers by analogy to water systems, with correction for visc...
Source: Advances in Colloid and Interface Science - September 21, 2023 Category: Chemistry Authors: Saad F Alkafeef Source Type: research
Brain-Penetrant Cyanoindane and Cyanotetralin Inhibitors of G2019S-LRRK2 Kinase Activity
We report the discovery of a series of cyanoindane and cyanotetralin kinase inhibitors culminating in compound 34 that demonstrated selective inhibition of phosphorylation of LRRK2 in the mouse brain. These novel inhibitors may further enable the precision medicine path for future PD therapeutics.PMID:37734423 | DOI:10.1016/j.bmcl.2023.129487
Source: Bioorganic and Medicinal Chemistry Letters - September 21, 2023 Category: Chemistry Authors: Albert W Garofalo Jacob Schwarz Kerry Zobel Claudia Beato Silvia Bernardi Federica Budassi Laura Caberlotto Peng Gao Cristiana Griffante Xinying Liu Marco Migliore Feifei Qiao Fabio Maria Sabbatini Anna Sava Mingliang Zhang Holly J Carlisle Source Type: research
