ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
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IF 6.2
Xing Zhang,Yifei Kong,Zihan He,Wenbin Yu,Wenjing Shao,Chengliang Gong,Wenlin Zhou,Xiaolong Hu
Perfluorooctanoic acid (PFOA) and tetrabromobisphenol A (TBBP-A) are emerging environmental contaminants with recognized potential health and ecological risks. This study investigated the effects of PFOA and TBBP-A exposure on the global of metabolites of silkworm gut with GC-MS metabolomics. Our results revealed distinct metabolic alterations in silkworms exposed to PFOA and TBBP-A, highlighting their differential impacts on silkworm health and productivity. Exposure to these chemicals significantly altered metabolic profiles, leading to disruptions in pathways related to lipid, carbohydrate, and amino acid metabolism. These findings suggest that PFOA and TBBP-A disrupt crucial metabolic processes in silkworms, indicating potential toxicity and prompting further investigation into their effects on human health and the environment. Ongoing research is crucial to develop safer alternatives and mitigate the risks associated with these persistent contaminants.
研究领域:
环境科学
·
昆虫学
·
代谢生物学
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2019
·
IF 7.913
Yang Wu,Yu Wang,Tao Pan,Xin Yang
The degradation of tetrabromobisphenol A (TBBPA), one of the most widely used brominated flame retardant , was evaluated during peroxymonosulfate (PMS) oxidation. TBBPA degradation was pH-dependent, with peak degradation rate constants occurring at pH 8.0–9.0, which was distinct from some other phenolic compounds . Singlet oxygen and radicals were found to play negligible roles in TBBPA degradation. TBBPA oxidation by PMS mainly proceeded via a direct oxidation pathway and the in-situ formed HOBr was found to greatly accelerate its degradation rates. The values of species-specific second-order rate constants for the reactions of PMS with the TBBPA k HSO5 − +TBBPA , k HSO5 − +TBBPA− and k HSO 5− +TBBPA2− were determined to be (1.11 ± 0.84) × 10 −2 , (8.05 ± 2.31) × 10 −2 , and (1.34 ± 0.25) × 10 −1 M −1 s −1 , respectively, while the reaction rate constants for HOBr/OBr − with TBBPA k HOBr+TBBPA , k HOBr+TBBPA− , k HOBr+TBBPA2− and k OBr−+TBBPA2− were determined to be (9.38 ± 2.10) × 10 3 , (1.59 ± 0.56) × 10 5 , (8.22 ± 0.41) × 10 6 , and (1.81 ± 0.12) × 10 6 M −1 s −1 , respectively. The bromine mass balance analysis showed that bromide ion and HOBr/OBr − occupied 19.5% of total Br and brominated organic compounds accounted for the remaining percentages at pH 7.0. No formation of bromate was observed. Based on the identified products, a reaction pathway was proposed, which included oxidation, β-scission, hydroxylation, and dimerization reaction pathways. The results indicate that unactivated PMS is useful for the remediation of TBBPA contaminated water .
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
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IF 3.9
Sana Jawaid,Bharat Prasad Sharma,Sadam Hussain Tumrani,Zaheer Abbas,Razium Ali Soomro,Selcan Karakuş,Tarık Küçükdeniz,Ayman Nafady
The escalating levels of environmental pollution, particularly from commercially used products, highlight the imperative of efficient sensor technologies to facilitate timely and effective remediation strategies. Herein, a simple method is proposed to enhance the electrochemical performance of CoWO 4 structures by coupling them with activated carbon (AC) for direct tetrabromobisphenol A (TBPA) oxidation. The systematic comparison shows that incorporation of AC with CoWO 4 not only improves the overall effective surface area (ESA) of the catalyst by 1.8-fold but also improves the cyclic voltammetry (CV) based irreversible oxidation current by 2.0-fold owing to improved conductivity and surface characteristics. Differential pulse voltammetry (DPV) based optimization of the sensory characteristics confirmed robust electrocatalytic TBPA oxidation within a 0.1 to 1.0 µM concentration range, achieving a 0.024 µM detection limit within PBS (0.1 M) (pH 5.0). Moreover, density functional theory (DFT) analysis confirms the non-covalent interaction favorability between TBPA and CoWO 4 surface, validating TBPA’s easy adsorption onto the catalytic surface and, thus, facilitated electron mobility between the molecule and the catalyst during the surface oxidation process. The DPV sensing interpreted using machine learning (ML) algorithms confirmed the detection accuracy of the developed sensor. Among the adopted models, artificial neural networks (ANN) achieved the highest R2 score (0.9659) and the lowest values across Mean Squared Error (MSE), Mean Absolute Error (MAE), and Root Mean Squared Error (RMSE) error matrices confirming its suitability in deciphering DPV correlations. Integrating ANN with DPV based electrocatalytic oxidation sensing underscores machine learning’s potential in analyzing complex electrochemical signatures, thus advancing intelligent sensing for precise environmental monitoring.
研究领域:
环境科学
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材料科学
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电化学
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人工智能
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产品关联
DOI
高影响因子
Micromachines
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2022
·Vol. 13
·期 1
·115
·
IF 3.523
Suxing Luo,Meizhi Yang,Yuanhui Wu,Jiang Li,Jun Qin,Feng Feng
Owing to its ubiquity in natural water systems and the high toxicity of its accumulation in the human body, it is essential to develop simple and low-cost electrochemical sensors for the determination of 3,3′,5,5′-tetrabromobisphenol A (TBBPA). In this work, Fe3O4–activated biochar, which is based on excess sludge, was prepared and characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and BET analysis to analyze its basic features. Subsequently, it was used to fabricate an electrochemical sensor for the detection of TBBPA. The electrochemical test results revealed that the Fe3O4–activated biochar film exhibited a larger active surface area, a lower charge transfer resistance and a higher accumulation efficiency toward TBBPA. Consequently, the peak current of TBBPA was significantly enhanced on the surface of the Fe3O4–activated biochar. The TBBPA sensing platform developed using the Fe3O4–activated biochar composite film, with relatively a lower detection limit (3.2 nM) and a wider linear range (5–1000 nM), was successfully utilized to determine TBBPA levels in water samples. In summary, the effective application of Fe3O4–activated biochar provided eco-friendly and sustainable materials for the development of a desirable high-sensitivity sensor for TBBPA detection.Keywords:sludge-based biochar;Fe3O4;TBBPA;electrochemical sensor
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Sylvestre Ndayiragije,Yifan Zhang,Yuqi Zhou,Zhou Song,Nan Wang,Tetsuro Majima,Lihua Zhu
Oxygen vacancy (V O ) engineering can efficiently improve the catalytic activity of metal oxides. This work developed a solvent-free mechanochemical method to tailor V O levels on the surface of commercial MnO 2 under ambient conditions. After a typical ball milling treatment at 350 rpm for 20 min, the obtained V O -rich MnO 2 activated peroxymonosulfate (PMS) to completely degrade tetrabromobisphenol (TBBPA) with a pseudo-first-order rate constant of 0.21 min −1 , being 22 times larger than that for non-milled MnO 2 . 18 O-labeling tests confirmed that singlet oxygen was generated from both PMS and lattice oxygen of MnO 2 as dominant active species for the TBBPA degradation. It was clarified that the catalytic activity of MnO 2 depends on not only V O levels, but also the local environment of V O , i.e., V O -associated cations. The Mn 4+ /Mn 3+ redox couple is more important than Mn 3+ /Mn 2+ , and V O improves the oxygen mobility in/on MnO 2 and Mn 4+ /Mn 3+ redox reactions for the activation of PMS.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
Desalination and Water Treatment
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2016
·
IF 1.272
Xiang Li,Qian Deng,Zaili Zhang,Xiaoshan Jia
In this study, remediation of tetrabromobisphenol-A (TBBPA) from aqueous solution by sorption using transition metals-modified inorganic–organic montmorillonite (IOMt) was demonstrated. The adsorbents were prepared in two steps: (1) intercalation of surfactants into Al13-pillared montmorillonite for synthesizing two types of IOMt; (2) incorporation of transition metals (Cu2+, Ni2+, or Co2+) onto those IOMts. Firstly, these materials were characterized by XRD, FTIR, TGA, SEM-EDS, and BET analyses. Then, experiments were conducted on the sorption isotherms, kinetics, and thermodynamics of TBBPA. In general, sorption process with Cu- and Ni-modified IOMt achieved higher TBBPA removal efficiency than sorption process with original IOMt. The modified IOMt displayed the sorption capacity that varied depending on TBBPA initial concentration, pH, and metals loading. However, the type of surfactants did not influence TBBPA sorption on metals-modified IOMt. This probably indicated that complex interaction between TBBPA and metals rather than hydrophobicity plays a key factor in TBBPA sorption process. Equilibrium data could be well interpreted by the Freundlich model, and the rate of sorption was adjusted to a pseudo-second-order kinetic model. The negative values of Gibbs energy change (∆G) and positive values of enthalpy change (∆H) indicated the spontaneous and endothermic nature of process.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Desalination and Water Treatment
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2016
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IF 1.272
Li Xiang,Zaili Zhang,Jia Xiaoshan
This work was to examine adsorption of tetrabromobisphenol-A onto acidic montmorillonite (K10) which had been considered as a potential adsorbent for removal of organic pollutants. The Langmuir, Freundlich, Langmuir–Freundlich, and Dubinin–Radushkevich models were applied with determination of sorption and desorption equilibrium isotherms and isotherms constants. The discrimination had been performed by means of various statistics. The results showed that Freundlich and Langmuir–Freundlich models described the sorption isotherms better than Langmuir model. Meanwhile, desorption hysteresis index calculated from Freundlich model was above zero and increased with increasing temperature, indicating occurrence of hysteresis. Preliminary to the isotherms data, adsorption kinetic had been gathered and tested using pseudo-first-order, pseudo-second-order, intra-particle diffusion, and double-exponential models (DEMs). From the kinetic studies, sorption process was completed in 48 h, and followed pseudo-second-order model and DEMs. Cationic surfactant in aqueous solution had positive effect on adsorption process, and the metal cations promoted sorption capacity in the order: Ni2+ > K+ > Zn2+ > Ca2+ > Na+. The optimum adsorption capacity was provided by the condition of pH 3, T = 288 K, and I = Ni2+. Additionally, the thermodynamic parameters indicated the sorption was exothermic and spontaneous. The interaction between K10 and TBBPA was investigated using FTIR.
研究领域:
环境科学
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化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Wenting Shen,Jiang Xu,Lizhong Zhu
Sulfidized nanoscale zerovalent iron (SNZVI) with improved reactivity and selectivity has shown great potential for environmental remediation. However, it is unclear if SNZVI could be applied for the remediation of soil washing solution, and how a soil-washing surfactant affects the reactivity and selectivity of SNZVI. Here, we assess the impact of Triton X-100 (TX-100) on the reactivity and selectivity of a sulfidized commercial NZVI toward tetrabromobisphenol A (TBBPA). While sulfidation of NZVI improved its reactivity and electron efficiency toward TBBPA, TX-100 could further improve these promoting effects, which was 8–21 and 4–7 times higher than those without TX-100, respectively, depending on TX-100 concentration. Because TX-100 could induce the solubilization of TBBPA, sorb onto the SNZVI surface, and favor the subsequent sorption and degradation of TBBPA. SNZVI performance for successive treatments of TBBPA contaminated water was also greatly improved by TX-100. Moreover, washing the TBBPA-contaminated soil with TX-100 could efficiently extract the TBBPA, and almost all of the TBBPA in the soil washing solution could be efficiently degraded by SNZVI. These results suggest that TX-100 is a good additive to SNZVI for improving its performance, and SNZVI coupled with TX-100 can be a promising technology for the remediation of TBBPA-contaminated soil.
研究领域:
环境科学
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土壤修复
·
地下水修复
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhijie Wu,Jing Zou,Sheng Li,Linfeng He,Qingsong Li,Zhenming Zhou,Yao Huang,Zhimin Yang,Jun Ma
Although Cu(II) can trigger peroxymonosulfate (PMS) oxidation of pollutants, it is only effective under alkaline environments and is susceptible to interference by aqueous matrix components. In this study, cysteine, a natural thiol and amino acid, was found to greatly improve the performance of tetrabromobisphenol A (TBBPA) elimination in the Cu(II)/PMS system across a broad pH range of 4.0–12.0. The cysteine/Cu(II)/PMS system achieved a 94.34 % elimination of TBBPA within 10 min at pH 7.0, which had a 7.55-fold increase in efficiency relative to the Cu(II)/PMS system, and superior to the previously-reported hydroxylamine and gallic acid-enhanced Cu(II)/PMS systems. Cu(III)-(cysteine) 2 , as opposed to radicals, was the main reactive species leading to the removal of TBBPA, contributing at least 91.53 %. Cysteine first coordinated with Cu(II) through sulfhydryl groups (−SH) and rapidly converted Cu(II)-(cysteine) 2 to Cu(I)-(cysteine) 2 , then Cu(III)-(cysteine) 2 was formed finally by the further oxidation of PMS on Cu(I)-(cysteine) 2 . This enhancement was further extended to other thiols including cysteamine, β-mercaptoethanol and mercaptosuccinic acid. Four potential degradation pathways of TBBPA were inferred from the determined nine degradation intermediates. A marked decline in the toxicity of the reaction solutions was observed after the elimination of TBBPA. Furthermore, the cysteine/Cu(II)/PMS system shown high anti-interference performance with common cations and anions (Ca(II), Mg(II), NO 3 – , SO 4 2– , HCO 3 – and Cl – ), humic acid and actual water samples. Overall, this study provided a promising approach to extend the working pH range of Cu(II)/PMS system and its anti-interference capability with actual water matrix, which was favorable for its potential utilization in water treatment.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ruohan Li,Lixun Zhang,Ying Zhang,Zhengfang Zhang,Yuntao Guan
Tetrabromobisphenol A (TBBPA), currently the most widely used brominated flame retardant, has attracted significant attention. However, traditional methods for deep debromination or mineralization of TBBPA usually include multiple steps and require external oxidants. In this study, we report a complete degradation of TBBPA through a one-step process of only adding a layered double oxide-supported sulfurized nanoscale zero-valent iron (S-nZVI@LDO) under ambient conditions. TBBPA was rapidly removed by S-nZVI@LDO with an efficiency of 95.6 % (10 mg⋅L -1 ) within 12 h. The kinetic rate constant (0.0035 min −1 ) was greater when compared with traditional reductants. The produced Br - ion occupied 76.7 % of total Br content, and the concentration of total organic carbon decreased by over 50 %, suggesting a deep debromination and mineralization of TBBPA by S-nZVI@LDO. It is caused by the substantial improvement of electron transfer, O 2 adsorption, and hydrophobicity of S-nZVI@LDO facilitating synchronous reductive debromination and O 2 activation to produce · O 2 – and · OH, as approved by electrochemical test, O 2 -TPO analysis, EPR analysis, and density functional theory calculations. The enriched structural S(−II) and enhanced Fe(III)/Fe(II) redox cycling exerted vital roles in maintaining the reduction potential of the composite. The degradation pathways analysis confirmed that debromination-mineralization mechanisms dominated the complete degradation of TBBPA. This study demonstrates the feasibility of the one-step mineralization removal of TBBPA only using S-nZVI@LDO under ambient conditions and offers insight into external oxidant-free in-situ elimination of halogenated persistent organic pollutants in a natural environment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 35
·29718-29726
·
IF 3.289
Hao Jin,Deyang Kong,Yuefei Ji,Junhe Lu,Quansuo Zhou
Sulfate radicals (SO4˙−) generated by heat activated persulfate were employed to degrade brominated flame retardant tetrabromobisphenol A (TBBPA). Experimental results showed that the reaction rate was first order to the concentrations of both persulfate and TBBPA. The degradation of TBBPA was accelerated with increasing temperature. Radical scavenging tests using ethanol and t-butanol as probes revealed that SO4˙− was the dominant oxidizing species. The degradation efficiency was adversely affected by the presence of humic acid and HCO3−. No significant inhibition of TBBPA degradation was observed in the presence of Cl−. Seven brominated intermediates and products were identified by liquid chromatography-mass spectrometry. Based on this, debromination and electron transfer followed by β-scission were proposed to be the primary pathways of TBBPA degradation. The results of this study suggest that the heat activated persulfate process could be an effective approach to remove TBBPA in aqueous solution.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2017
·
IF 4.217
Fu He,Yong Ji,Yang Wang,Yun Zhang
Nanoscale zerovalent iron (nZVI) loaded magnetic hollow mesoporous bimetallic Fenton-like catalyst, Fe 0 @C@MnFe 2 O 4 , was prepared by a one-pot solvothermal method. Carbon shell of polydopamine (PDA) was formed through self-oxidation of dopamine by adding MnFe 2 O 4 hollow spheres into dopamine solutions. Then Fe 2+ ions were adsorbed on the surface of PDA@MnFe 2 O 4 to obtain active nZVI in-situ through subsequent calcinations. Thus, the mesoporous carbon shell of Fe 0 @C@MnFe 2 O 4 had a great contribution to high adsorption capacity for concentrating TBBPA around the catalyst. The high concentration of TBBPA outside would further facilitate the transportation to the inside of the hollow catalyst to achieve a high catalytic efficiency. Fe 0 @C@MnFe 2 O 4 , as an integrated adsorbent-catalyst, was used to remove Tetrabromobisphenol A (TBBPA) in aqueous solution with the presence of H 2 O 2 and NH 2 OH. Over 90% of TBBPA can be removed within 120 min. According to the result of ESI–MS, β -scission and debromination were involved in the degradation of TBBPA. The reused catalyst could be easily separated by using an external magnetic field in seconds. After ten cycles, the catalyst was still of good activity. The excellent removal efficiency of TBBPA might be attributed to the synergistic effect from high adsorption capacity and efficient Fenton-like catalytic reaction of Fe 0 @C@MnFe 2 O 4 .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）