Environmental Science-Water Research & Technology
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2024
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IF 3.5
Fan Bai,Zongping Wang,Guodong Wan,Lisan Cao,Yujie Cheng,Zhenbin Chen,Pengchao Xie
In this study, Fe(III)/sulfite (S(IV)) system was used to treat two actual water samples including a lake water sample and a secondary sedimentation tank effluent sample containing tribromophenol (TBP) with combined pre-oxidation and coagulation process. This process not only efficiently removed TBP but also facilitated the removal of background organic compounds. The treatment efficiency increased with the increased S(IV) addition times. The results from scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) showed that the in-situ generated flocs in the Fe(III)/S(IV) system exhibited enhanced specific surface area, adsorption capacity, and coagulation properties compared to those produced in single Fe(III) coagulation, with generating more Fe3O4 particles. The treatment efficiencies of TBP and background organic materials initially rose and then fell with an increase in S(IV) dosage. Moderately incrementing Fe(III) dosage also boosted the removal of TBP and background organic substances, whereas excessive Fe(III) dosage provided limited additional benefits. In the selected pH range of 3-8, good removal of turbidity could be always achieved, and the best removal of TBP and background organic substances was found at pH 4. Overall, this study indicated that the Fe(III)/S(IV) system with combined pre-oxidation and coagulation process would be an effective treatment strategy for aquatic organic micropollutants.
研究领域:
环境科学
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水处理技术
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高影响因子
Environmental Science-Water Research & Technology
·
2024
·
IF 3.5
Fan Bai,ye liu,Yujie Cheng,Yingqing Guo,Zhenbin Chen,Lisan Cao,Zongping Wang,Pengchao Xie
2,4,6-tribromophenol (TBP) is widely distributed in environmental media, posing potential risks to human health and ecological systems. The efficient treatment of TBP-contaminated water is a significant challenge. In this study, a combined process of oxidation and coagulation using Fe(III)/CaSO3 was employed to treat actual water samples spiked with TBP. The slow release of S(IV) from CaSO3 into the solution benefited the treatment efficiency, and the Fe(III)/CaSO3 system not only effectively removed TBP but also significantly enhanced the removal of background organic compounds via oxidation and coagulation. The optimal water quality was achieved with Fe(III) and CaSO3 dosages of 100 μM and 400 μM, respectively, with an initial pH of 3.5. As for the Fe(III)/CaSO3 system, larger-sized crystals were observed after treating the secondary clarifier effluent compared to that in the sole Fe(III) coagulation process. Further coagulation after Fe(III)/CaSO3 oxidation offers a new approach to apply activated S(IV)-based advanced oxidation technologies in the field of water treatment, demonstrating its potential in the effective treatment of TBP in water.
研究领域:
环境科学
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化学工程
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Pu-Can Guo,Chuan-Wang Yang,Zi-Qi Chu,Xin Zhang,Guo-Ping Sheng
Seeking bifunctional suspended catalyst for halogenated organics dehalogenation and mineralization is urgent. Herein, a novel suspended catalyst, AgPd nanoparticles supported on cyclodextrin polymers (AgPd@CDs), was designed for synchronous reduction-oxidation of 2,4,6-tribromophenol in a three-dimensional electrochemical reactor (3DER). In this 3DER, AgPd@CDs presented 100.0% 2,4,6-tribromophenol removal efficiency under the optimized condition. The superior catalytic activity of AgPd@CDs was due to monodispersion of AgPd nanoparticles on CDs matrix and electron density modulation for Pd hollow sites' activity via electron transfer from Ag to Pd. Scavenger experiments and EPR results revealed that •OH and H• were responsible for synchronous 2,4,6-tribromophenol abatement. Moreover, CDs matrix not only promoted interfacial affinity between 2,4,6-tribromophenol and catalyst, but also inhibited reduction of O 2 by H 2 due to hydrophilic surface property and confined space effect in cavity, thus facilitating 2,4,6-tribromophenol enrichment and synchronous oxidation-reduction on AgPd@CDs. These findings provide conceptual insights into catalyst design for advanced wastewater treatment.
研究领域:
环境科学
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催化化学
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废水处理
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高影响因子
ENVIRONMENTAL POLLUTION
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2017
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IF 5.099
Man Ren,Hao Zeng,Ping-An Peng,Hui-Ru Li,Cai-Ming Tang,Jian-Fang Hu
Polybrominated dibenzo- p -dioxins (PBDDs) and hydroxylated polybrominated diphenyl ethers (OH-PBDEs) can be formed from bromophenols (BPs) by thermal degradation , biosynthesis or phototransformation. However, it is unknown whether PBDDs and OH-PBDEs can be formed during the chemical production processes that utilize BPs as raw materials. 2,4,6-tribromophenol (2,4,6-TBP) is an important raw material for the synthesis of 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), a novel brominated flame retardant . In this study, PBDDs, polybrominated dibenzofurans (PBDFs) and OH-PBDEs have been identified and quantified in commercially available BTBPE and 2,4,6-TBP. Furthermore, their formation as unintentional by-products during the laboratory synthesis of BTBPE from 2,4,6-TBP and 1,2-dibromoethane in the presence of sodium carbonate has also been investigated. 2,3,7,8-substituted PBDDs and PBDFs (2,3,7,8-PBDD/Fs) were undetectable in commercial samples of BTBPE and present in low levels (nanogram per gram) in 2,4,6-TBP. Two tetrabrominated dibenzo- p -dioxins (TeBDDs), namely 1,3,6,8- and 1,3,7,9-TeBDD, and three hydroxylated pentabrominated diphenyl ethers (OH-pentaBDEs), namely 4′-OH-BDE121, 2′-OH-BDE121, and 6′-OH-BDE100, were identified or tentatively identified, and quantitatively estimated to be at concentrations in the range of undetectable to several thousands of nanograms per gram in commercial BTBPE and 2,4,6-TBP. TeBDDs and OH-pentaBDEs were formed as by-products from 2,4,6-TBP during BTBPE synthesis. Further studies need to be conducted in order to determine whether PBDD/Fs and OH-PBDEs are also formed during the industrial synthesis of other chemical compounds that utilize BPs as raw materials or intermediates.
研究领域:
环境科学
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毒理学
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化学
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Weimei Jin,Changyan Xiao,Jing Zhao,Guangfeng Yang,Qingguo Chen,Lijuan Feng
Non-antibiotic substances have been found to contribute to the spread of antibiotic resistance. Bromophenols (BPs) are special anti-bacterial substances obtained from seaweed. This study explored the modulatory effect of trace BPs from a live seaweed on the antibiotic resistance of pathogenic Vibrio ( V. ) strains. A hydroponic solution of Ulva fasciata was found to contain trace levels (9–333 μg L −1 ) of 2,4,6-tribromophenol (TBP), a typical BP. TBP at a concentration of 165 μg L −1 significantly increased the inhibition zone diameter of widely used β-lactam antibiotics (amoxicillin and ampicillin) against V. alginolyticus M7 ( Va. M7) and V. parahaemolyticus M3 ( Vp. M3) as well as reduced the minimum inhibitory concentration by 2–4 fold against Va. M7. Whole genome re-sequencing analysis demonstrated that Va. M3 (53−60) had more mutant genes than Vp . M7 (44) in β-lactam resistance pathway. Transcriptome sequencing analysis, along with verification through RT-qPCR, further showed that oligopeptide permease (opp) was the only differentially expressed gene (DEG) among the mutated genes in the β-lactam resistance pathway. The opp transport activity and membrane permeability of Vibrio were both enhanced at 165 μg L −1 of TBP, and the ability of biofilm formation was also decreased. Thus, antibiotics resistance improvement of Vibrio by TBP was potentially related with the promoted opp transport activity, membrane permeability and inhibited biofilm formation.
研究领域:
微生物学
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环境科学
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药理学
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PubMed
高影响因子
LUMINESCENCE
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2015
·Vol. 31
·期 1
·96-101
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IF 1.518
Si-Yao Liu,Huan Wang,Tian He,Liang Qi,Zhi-Qi Zhang
A fluorescence method was established for a α-glucosidase activity assay and inhibitor screening based on β-cyclodextrin-coated quantum dots. p -Nitrophenol, the hydrolysis product of the α-glucosidase reaction, could quench the fluorescence of β-cyclodextrin-coated quantum dots via an electron transfer process, leading to fluorescence turn-off, whereas the fluorescence of the system turned on in the presence of α-glucosidase inhibitors. Taking advantage of the excellent properties of quantum dots, this method provided a very simple, rapid and sensitive screening method for α-glucosidase inhibitors. Two α-glucosidase inhibitors, 2,4,6-tribromophenol and acarbose, were used to evaluate the feasibility of this screening model, and IC 50 values of 24 μM and 0.55 mM were obtained respectively, which were lower than those previously reported. The method may have potential application in screening α-glucosidase inhibitors. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
生物化学
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分子生物学
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分析化学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Qiuqi Niu,Xiyu Zhang,Yang Wu,Chuanzhi Sun,Xiong Zheng,Min Long,Yinguang Chen
The escalating global production of waste activated sludge (WAS) presents both environmental challenges and opportunities for resource recovery through anaerobic fermentation (AF) to volatile fatty acids (VFAs). However, the ubiquitous presence of emerging contaminants (ECs, e.g., tribromophenol (TBP)) in WAS, resulting from extensive industrial applications, raises critical concerns about potential impacts on fermentation process. This study systematically investigated dose-dependent effects of TBP on VFA production during WAS fermentation, focusing on organic matter (OM) transformation, microbial metabolism, and adaptive mechanisms. Results demonstrated that low-dose TBP (10 mg/g TSS) enhanced VFA yield by 30.4 % (from 1288 to 1680 mg COD/L), while high-dose TBP (100 mg/g TSS) inhibited production by 8.0 % (to 1185 mg COD/L). Spectroscopic analysis confirmed TBP addition significantly attenuated amide I/II band intensities (1656/1546 cm −1 ) in FTIR and reduced amino acid-associated organic C=O/C-O XPS peak areas in the solid phase, while proportionally increasing amino acids in the liquid phase. This dissolution of solid-phase proteins by TBP thereby enhanced substrate bioavailability for fermentation. The improved substrate availability stimulated the growth of Firmicutes (increased by 53.52 %) and protein-degrading genera (e.g., Proteocatella ), while upregulating key metabolic pathways including amino acid metabolism (e.g., hisC and maiA ), glycolysis (e.g., HK and apgM ), and pyruvate metabolism (e.g., porA and korA ). Moreover, low-dose TBP enhanced microbial adaptability through quorum sensing (e.g., lsrB increased by 43.9 %) and two-component systems (e.g., rstB increased by 14.0 %). However, these beneficial effects were reversed at high TBP concentrations, leading to decreased microbial activity and VFA production. This work provides a comprehensive insight into ECs impacts on WAS fermentation, highlighting the critical need for dose-dependent process control to ensure safe resource recovery.
研究领域:
环境科学
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生物技术
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微生物学
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化学工程
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废弃物管理
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分析化学
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生物化学
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高影响因子
危险品化学品经营许可证（带存储）