ENVIRONMENTAL RESEARCH
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2021
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IF 6.498
Zhendong Yu,Jiachen Ma,Jinlan Dai,Shiyu He,Xiaoyi Huang,Yuancai Lv,Yifan Liu,Chunxiang Lin,Junfeng Chen,Minghua Liu
In this study, a bimetallic composite catalyst (Co–Fe@C) was fabricated with calcination at high temperature (800 °C) by using Co-MIL-101 (Fe) as the precursor. The characterization results showed that the resulted Co–Fe@C composite mainly consisted of carbon, FeCo alloys, Fe 3 O 4 , Co 3 O 4 and FeO, and owned evident magnetism. In addition, the Co–Fe@C was employed to activate the peroxydisulfate (PDS) to degrade a representative organic pollutant ( p -arsanilic acid, p -ASA) and the main factors were optimized, which involved 0.2 g L −1 of catalyst dosage, 1.0 g L −1 of PDS dosage and 5.0 of initial pH. Under the optimal condition, Co–Fe@C/PDS system could completely degrade p -ASA (20 mg L −1 ) in 5 min. In the Co–Fe@C/PDS system, SO 4 − · , Fe(IV) and ·OH were the main species during p -ASA degradation. Under the attack of these species, p -ASA was first decomposed into phenols and then transformed into the organics acids and finally mineralized into CO 2 and H 2 O through a series of reactions like hydroxylation, dearsenification, deamination and benzene ring opening. Importantly, most of the released inorganic arsenic species (93.40%) could be efficiently adsorbed by the catalyst.
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 11
·12017-12029
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IF 3.056
Lv Yuancai,Huang Siyi,Huang Guofu,Liu Yifan,Yang Guifang,Lin Chunxiang,Xiao Gao,Wang Yonghao,Liu Minghua
Given their considerable solubility in water and potentially high toxicity to human health, organoarsenic compounds have become an emerging contaminant. Herein, a heterogeneous Fenton process mediated by SiO 2 -coated nano zero-valent iron (SiO 2 -nZVI) was employed to simultaneously remove the p -arsanilic acid ( p -ASA, a typical organoarsenic compound) and the released arsenic. The initial pH value significantly influenced on the degradation of p -ASA and at the optimal pH (3.0), p -ASA (10 mg L −1 ) could be completely oxidized to As(V), NH 4 + , and plentiful phenolic compounds such as phenol and p -hydroquinone via the cleavage of C–N and C–As bonds within 60 min in pure water. Meanwhile, although the formed lepidocrocite and magnetite on the surface of SiO 2 -nZVI significantly limited the reutilization, they played a vital role in the adsorption of the released As(V) and the residual arsenic levels in the effluent were as low as 0.031 mg L −1 , meeting both the drinking water standard of the World Health Organization (WHO) and the surface water standard of China (0.05 mg L −1 ). Furthermore, high-level dissolved organic matters (DOM) (> 2 mg C L −1 ) exhibited strong interference with both the oxidation of p -ASA and adsorption of arsenic, but the interference could be eliminated by increasing the SiO 2 -nZVI dosage or adding H 2 O 2 . Importantly, this system could completely remediate p -ASA in a short time and simultaneously avoid the secondary pollution caused by inorganic arsenic, which was significant for the remediation of organoarsenic pollutants in swine wastewater.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
ACS ES&T Water
·
2024
·
IF 4.8
Yanli Kong,Fan Lu,Aihua Huang,Zhonglin Chen,Jiangya Ma
In this study, iron–aluminum covalently bonded modified activated carbon (CAFM@PAC) was prepared by a constant-temperature infiltration method, which demonstrated highly efficient removal capability against p-aminobenzoic acid (p-ASA). The complete degradation of 30 μM p-ASA was achieved within 6 h at a dosage of 2.0 g/L CAFM@PAC, which was attributed to the enhanced adsorption mechanism involving electrostatic, hydrogen bonding, and π–π EDA interactions, as well as synergistic interactions between the Fe/Al/C fractions for the in situ production of H2O2 under acidic conditions, which triggered a Fenton-like reaction for the generation of ROS. The Fe/Al covalent structure promotes rapid electron transfer and accelerated Fe2+/Fe3+ cycling, resulting in a highly efficient H2O2 generation system. DFT calculations and product analysis confirmed that the C3 and C6 sites of p-ASA were the key sites for ROS attack. CAFM@PAC exhibited strong environmental adaptability and high recyclability, and maintains excellent removal efficiencies even in a multi-ionic system, with very low leakage of metal ions. CAFM@PAC showed excellent removal efficiency even in a polyconic system and very low metal ion leakage, demonstrating its potential as a sustainable water treatment material.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Runqiao Chen,Shuheng Yi,Zhipan Wen,Han Feng,Xing Yin,Lingyue Shu,Yalei Zhang
To enhance the special selectivity and recognizability of two kinds of typical phenylarsonic compounds ( p -arsanilic acid ( p -ASA) and roxarsone (ROX)) in complicated water bodies, novel double-template molecularly imprinted polymers (DMIPs) were successfully synthesized via the suspension polymerization method. Subsequently, laboratory scale tests were carried out to systematically investigate the adsorption behavior and performance of p -ASA and ROX by using polymers. The result indicated that DMIPs exhibited super p -ASA/ROX sequestration and immobilization compared with non-imprinted polymers (DNIPs), which was associated with imprinting effect of polymers. The better removal efficiency of p -ASA/ROX by DMIPs were occurred in a broad pH region (3.0–9.0), whereas solution pH severely affected the uptake of DNIPs for organic arsenic compounds. According to the remarkable binding selectivity and special recognizability of DMIPs, common inorganic ions and natural organic matters (NOM) were negligible influence on targeted pollutants removal, and excellent adsorption capacity could still maintain even in the presence of interfering substances that displayed similar chemical structure with templates to a certain extent. Finally, the remarkable reusability and stable performance in continuous flow studies demonstrated the obtained DMIPs were promising candidates for simultaneously and effectively eliminating these multiple organic arsenic pollutants in harsh and complicated aquatic environment.
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DOI
高影响因子
危险品化学品经营许可证（带存储）