CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chuxuan Zhao,Zixin Liu,Yi Wu,Juntao Guo,Peng Huang,Yifei Wang,Yeheng Leng,Ivan P. Pozdnyakov,Jing Xu,Feng Wu
The widespread used organic arsenic pesticides and veterinary drugs have drawn attention for decades. Its photochemical transformation in the surface water contributes to its degradation and the formation of products. The effect of co-existent components like anthropogenic reagents (e.g. ethylenediaminetetraacetatic acid, EDTA) on the photochemical transformation has still to be investigated in depth. Fe(III)-EDTA complex is a common and abundant complex in surface water. In this work, UVA light and simulated sunlight have been used as light sources to explore the effect of Fe(III)-EDTA on the photodegradation of p -arsanilic acid (ASA), used as an organic arsenic feed additive. Whereas ASA hardly absorbs UVA light and can only be directly photolyzed by simulated sunlight, the Fe(III)-EDTA complex is photoactive under either light source. At pH 6, the presence of Fe(III)-EDTA complex enhances the photodegradation efficiency of ASA from 0% to ca. 23% after 180 min reaction under UVA light irradiation, and from 30% to ca. 58% after 45 min reaction under simulated sunlight irradiation. Appropriate amount of EDTA enhances the photodegradation efficiency, whereas excessive EDTA suppresses the initial reaction rate. Mechanistic study has revealed contributions from direct photolysis and photochemical reactions of Fe(III)-EDTA and Fe(III)–OH complexes. Generated •OH has been confirmed as the important contribution. Photodegradation products include inorganic arsenic, organic arsenic, and other organic by-products, and the proportions of these products vary in different light-induced systems due to the diverse reaction pathways. The results of this work improve our understanding of the risks of residual ASA in the environment, allow prediction of its migration and transformation, and show how organic arsenic livestock and poultry feed additives might be removed.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Jing Xu,Heng Zhang,Tao Luo,Zizheng Liu,Jun Xia,Xiang Zhang
The effects of co-existing nitrogen species in surface water on the phototransformation of organoarsenical p -arsanilic acid ( p -ASA) have been investigated using a xenon lamp as a simulated solar light source. Significant enhancements of p -ASA phototransformation efficiency were observed in the presence of nitrate and nitrite, increasing with the concentration of these species and pH, whereas ammonia showed no obvious effect. The products, including inorganic arsenic species and organic derivatives, have been analyzed in order to reveal the phototransformation pathways. In the nitrate and nitrite systems, only small proportions of inorganic arsenic species were generated, with the majority of p -ASA being converted into other organoarsenical derivatives through hydroxylation, nitration, and nitrosation. Phototransformation of p -ASA in collected natural surface water was also observed. This work has implications for the phototransformation of p -ASA in nitrogen-contaminated surface water.
研究领域:
环境科学
·
水污染控制
·
光化学反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wei Zhang,Wei Liu,Guoliang Li,Wei Du,Jianbo Lu,Jianguo Song,Qixia Yang,Xiangming Li,Huizhong Xu,Xu He,Jun Ma
The para arsanilic acid ( p -ASA) used as feed additive in the poultry and swine industries tends to transform into more toxic inorganic arsenic (As(V) and As(III)), leading to a greater risk to human health and environmental system. In this study, simultaneous adsorption and oxidation of p -ASA was achieved by a synthesized highly efficient nanostructured Fe-Ti-Mn composite oxide (FTMO), with a high specific surface area of 424.7 m 2 /g. The maximum adsorption capacity for p -ASA could be as high as 45.6 mg/g, meanwhile the combined oxidation/photo-oxidation processes led to the formation of intermediate containing hydrazine group, however, without release of toxic inorganic As(III) and As(V). The p -ASA adsorption by FTMO was verified as the chemisorption process with the formation of inner-sphere complexes at the solid/water interface, which was prominently influenced by solution pH, coexisting ions and humic acid, however relatively insensitive to ionic strength. The systematic characterization by FTIR, XPS, EPR and XANES revealed that Fe phase of FTMO played the dominant role for p -ASA adsorption, while Mn and Ti phases were responsible for the oxidation and photo-oxidation of p -ASA, respectively.
研究领域:
环境科学
·
材料科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2016
·
IF 2.208
Suqi Li,Jing Xu,Wei Chen,Yingtan Yu,Zizheng Liu,Jinjun Li,Feng Wu
p -Arsanilic acid ( p -ASA) is widely used in China as livestock and poultry feed additive for promoting animal growth. The use of organoarsenics poses a potential threat to the environment because it is mostly excreted by animals in its original form and can be transformed by UV–Vis light excitation. This work examined the initial rate and efficiency of p -ASA phototransformation under UV-C disinfection lamp. Several factors influencing p -ASA phototransformation, namely, pH, initial concentration, temperature, as well as the presence of NaCl, NH 4 + , and humic acid , were investigated. Quenching experiments and LC–MS were performed to investigate the mechanism of p -ASA phototransformation. Results show that p -ASA was decomposed to inorganic arsenic (including As(III) and As(V)) and aromatic products by UV-C light through direct photolysis and indirect oxidation. The oxidation efficency of p -ASA by direct photosis was about 32%, and those by HO and 1 O 2 were 19% and 49%, respectively. Cleavage of the arsenic–benzene bond through direct photolysis, HO oxidation or 1 O 2 oxidation results in simultaneous formation of inorganic As(III), As(IV), and As(V). Inorganic As(III) is oxidized to As(IV) and then to As(V) by 1 O 2 or HO . As(IV) can undergo dismutation or simply react with oxygen to produce As(V) as well. Reactions of the organic moieties of p -ASA produce aniline, aminophenol and azobenzene derivatives as main products. The photoconvertible property of p -ASA implies that UV disinfection of wastewaters from poultry and swine farms containing p -ASA poses a potential threat to the ecosystem, especially agricultural environments.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Jing Xu,Xiangyi Shen,Duanli Wang,Chuxuan Zhao,Zizheng Liu,Ivan P. Pozdnyakov,Feng Wu,Jun Xia
The usage of p -arsanilic acid (ASA) in livestock and poultry farms leads to its release into the environment. The phototransformation of ASA generates toxic inorganic arsenic species and organic by-products, which affects the water security of the peripheral river basin. In this work, we have investigated the pH-dependent kinetics and mechanisms of ASA photolysis under Ultraviolet-C (UV-C) light (254 nm) irradiation in the pH range 1–11 in the absence of oxygen. The degradation rate of ASA, the ratio of the generated inorganic arsenic species, and the amount of primary organic by-products were determined under the aforesaid conditions. Our results clearly showed the pH-dependent photochemistry of ASA. The photolysis rate was low under acidic conditions, and As(III) and p -aminophenol were the main products. With increasing pH, the photolysis rate increased significantly, and As(V) and aniline became the main products. A pH-based kinetic model has been established that allows prediction of the generation rates of As(III), As(V), p -aminophenol, and aniline according to the photolysis rate of ASA.
研究领域:
环境科学
·
化学动力学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Tianyi Sun,Zhiwei Zhao,Zhijie Liang,Jie Liu,Wenxin Shi,Fuyi Cui
A bifunctional CuO-Fe 3 O 4 material was synthesized and employed for the photocatalytic degradation of p-arsanilic acid (p-ASA) under visible light irradiation and simultaneous removal of the released inorganic arsenic by adsorption from solution. The effects of major factors, including solution pH, bicarbonate ion, halide ion and humic acid , on the p-ASA degradation were investigated. Under various water quality conditions, an excellent removal of p-ASA could always be achieved by the CuO-Fe 3 O 4 photocatalytic process and p-ASA could be completely converted to As(V) within 36 min. Simultaneously, the released As(V) could be adsorbed onto the surface of CuO-Fe 3 O 4 nanoparticles with high efficiency above 95% at initial pH range from 4 to 7. The presence of humic acid significantly weakened the degradation of p-ASA by scavenging OH, and slightly inhibited the As(V) removal. On the basis of the UV–vis, FTIR, XPS analysis and the major degradation products detected, the mechanism of the p-ASA photocatalytic degradation and the released As(V) adsorption by CuO-Fe 3 O 4 nanoparticles was given, and the degradation pathway of p-ASA during the photocatalytic process was also taken into consideration. Combined with the photocatalytic property and the high adsorption capacity of As(V), the synthesized magnetic CuO-Fe 3 O 4 nanoparticles have significant potential applications for controlling the risk of p-ASA in wastewater.
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
CRYSTAL GROWTH & DESIGN
·
2022
·
IF 4.01
Yunping Zhoujin,Yuping Li,Peng-Yu Liang,Pan-Pan Zhou,Sean Parkin,Tonglei Li,Faquan Yu,Sihui Long
A series of homologues (1–4) of fenamic acid have been synthesized by varying the length of the linker between the two aromatic rings, and their polymorphism has been investigated. Under the same crystallization conditions, each of the newly synthesized compounds leads to two forms, except for compound 1, which indicates that additional flexibility due to homologation does not necessarily lead to more polymorphs. The molecules in each polymorphic system show different conformations due to the rotation about specific sigma bonds. Phase transitions are observed between the polymorphs of each system. Conformational analysis and Hirshfeld surface analysis were applied to investigate the effect of conformational flexibility on the polymorphism of these compounds.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xiao-Ying Li,Wen-Qing Ding,Pan Liu,Lei Xu,Ming-Lai Fu,Baoling Yuan
The p -arsanilic acid ( p -ASA) and roxarsenic (ROX) are typical organic arsenic compounds (OACs), which can be evolved into highly poisonous inorganic arsenic species in the aqueous solution. Herein, a magnetic MOFs-based composite of Fe 3 O 4 /MIL-101 was successfully obtained by a stepwise solvothermal method and further used in the adsorption of p -ASA and ROX. The structural and physicochemical characteristics of Fe 3 O 4 /MIL-101 were firstly investigated in detail. It was found that Fe 3 O 4 microspheres were evenly embedded on the polyhedral MIL-101 surface after the solvothermal process and exhibited a strong superparamagnetic property. After adsorption, a simple external magnetic field can be used to quickly separate the composite from the aqueous solution. The adsorption experiments indicated that the composite is an excellent adsorbent with maximum adsorption capacities of 683.44 and 946.57 mg·g −1 for p -ASA and ROX, respectively. In addition, the effects of composite dosage, initial pH and co-existing anions on the adsorption efficiency were investigated. The main adsorption mechanism consists of the existence of hydrogen bonding , π-π stacking and As-O-Fe coordination between Fe 3 O 4 /MIL-101 composite and OACs. We believe that this study would be very meaningful to promote the application of magnetic MOFs based composites for effective adsorption for OACs in the environmental remediation.
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
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xiaoxia Ye,Jian Huang,Yuqing Zhang,Yi Lin,Yuancai Lv,Chunxiang Lin,Liang Song,Guifang Yang,Minghua Liu
Para-arsanilic acid ( p -ASA) is widely used as a feed additive, making it a pervasive environmental pollutant. Due to its migratory and transformative nature, p -ASA can easily convert into more toxic inorganic arsenic during its migration, thereby increasing the ecological burden and posing a threat to human health. Efficient removal of p -ASA from water is crucial for mitigating arsenic contamination. Efficient removal of p -ASA from water is crucial for mitigating arsenic contamination. This study introduced zirconium-loaded collagen fiber membrane (CFM Zr), a novel, sustainable membrane adsorption material synthesized by retanning collagen fiber membranes (CFM) with zirconium (Zr). Leveraging the physicochemical properties of CFM and the strong affinity of Zr for p -ASA, CFM-Zr achieved highly efficient p -ASA removal. The resulting membrane was made entirely from green, low-carbon and recyclable raw materials, achieving sustainable removal of p -ASA while realizing the concept of treating waste with waste for environmental recovery. Remarkably, the retanning with zirconium significantly enhanced the Zeta potential of CFM Zr, strengthening its electrostatic attraction to p -ASA, with a maximum adsorption capacity of 289.02 mg·g −1 , which was 19.72 times higher than that of the CFM before retanning (13.95 mg·g −1 ). Its adsorption rate constant was 12.54 mg·g −1 ·min −1 . Moreover, CFM-Zr showed good reusability and exhibited electrostatic adsorption and metal coordination effects on the “organic” parts (-OH, -NH 2 ) and “inorganic” parts (As O) of p -ASA, effectively removing it. This work provided a promising bio-based material for water purification, promoted the sustainable utilization of leather industry waste, and offered significant advancements in environmental remediation and resource recovery.
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
CHEMOSPHERE
·
2021
·
IF 7.086
Xiaoxia Ye,Huiting Lin,Ruiyang Chi,Zhixuan Guo,Yuancai Lv,Chunxiang Lin,Yifan Liu,Wei Luo
Efficient and rapid removal of p -arsanilic acid ( p -ASA) in water is very important in environmental protection and human health, however it is still a severe challenge in actual engineering. Herein, a novel sorbent (CF-PEI) was successfully fabricated by simply modifying the amphiphilic skin collagen fiber (CF) substrate with Polyethylenimine (PEI). The as-prepared CF-PEI exhibits high-efficiency adsorption for negatively charged p -ASA with aromatic rings due to the introduction of amino groups and the existence of hydrophobic bands, and the maximum adsorption capacity of CF-PEI for p -ASA was high up to 285.71 mg g −1 . In addition, the adsorption mechanism of CF-PEI on p -ASA mainly includes electrostatic interaction, hydrogen bond and amphiphilicity. The multi-level all-fiber structure of CF makes it mainly focus on surface mass transfer with short mass transfer distance, and its capillary drainage effect can realize large flow and rapid separation. CF-PEI based on CF can realize the ability to separate low-concentration p -ASA with high flow rate and high efficiency. The effective processing volume was 12.5 L g −1 when the separation flux reached as high as 9931.27 L m −2 h −1 . Notably, the p -ASA adsorbed on CF-PEI was almost completely eluted by NaOH (0.5 mol L −1 ). The adsorbent is convenient to prepare, recyclable, high in efficiency, and has a great application prospect in removing organic micro-pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Ming-Kun Ke,Gui-Xiang Huang,Shu-Chuan Mei,Zhao-Hua Wang,Ying-Jie Zhang,Tian-Wei Hua,Li-Rong Zheng,Han-Qing Yu
As one of the extensively used feed additives in livestock and poultry breeding, p-arsanilic acid (p-ASA) has become an organoarsenic pollutant with great concern. For the efficient removal of p-ASA from water, the combination of chemical oxidation and adsorption is recognized as a promising process. Herein, hollow/porous Mn–Fe-mixed oxide (MnFeO) nanocubes were synthesized and used in coupling with peroxymonosulfate (PMS) to oxidize p-ASA and remove the total arsenic (As). Under acidic conditions, both p-ASA and total As could be completely removed in the PMS/MnFeO process and the overall performance was substantially better than that of the Mn/Fe monometallic system. More importantly, an interface-promoted direct oxidation mechanism was found in the p-ASA-involved PMS/MnFeO system. Rather than activate PMS to generate reactive oxygen species (i.e., SO4·–, ·OH, and 1O2), the MnFeO nanocubes first adsorbed p-ASA to form a ligand–oxide interface, which improved the oxidation of the adsorbed p-ASA by PMS and ultimately enhanced the removal of the total As. Such a direct oxidation process achieved selective oxidation of p-ASA and avoidance of severe interference from the commonly present constituents in real water samples. After facile elution with dilute alkali solution, the used MnFeO nanocubes exhibited superior recyclability in the repeated p-ASA removal experiments. Therefore, this work provides a promising approach for efficient abatement of phenylarsenical-caused water pollution based on the PMS/MnFeO oxidation process.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Yuliya E. Tyutereva,Petr S. Sherin,Marina V. Parkhats,Zizheng Liu,Jing Xu,Feng Wu,Victor F. Plyusnin,Ivan P. Pozdnyakov
The mechanism of direct UV photolysis of p-arsanilic acid (p-ASA), a widely used veterinary drug, was revised by means of laser flash photolysis coupled with high resolution liquid chromatography – mass spectrometry (LC-MS). None of p-ASA triplet state or singlet oxygen was found to directly participate in the photodegradation of p-ASA as it was assumed in previous works. Here we demonstrate that the main primary photoprocess is a monophotonic ionization (ϕ ion 266nm = 0.032) leading to the formation of hydrated electron and corresponding anilinyl cation radical. These primary species react with dissolved oxygen yielding secondary reactive oxygen species . The final organic photoproducts, such as aminophenol and different dimeric products, originate from various reactions between these secondary species. The generation of inorganic arsenic, both As(V) and As(III), was also observed in agreement with previous works. For the first time we report the quantum yield of p-ASA photodegradation, which decreases from 0.058 to 0.035 with the excitation wavelength from 222 to 308 nm.
研究领域:
环境科学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）