CHEMOSPHERE
·
2021
·
IF 7.086
Jinbin Lin,Junyang Xiao,Hengyu Cai,Yixin Huang,Jiawen Li,Haoyu Yang,Tao Li,Jing Zou
In this study, a multi-wavelength spectrophotometric method for simultaneous determination of peracetic acid (PAA) and coexistent hydrogen peroxide (H 2 O 2 ) was presented. This method was based on the oxidation of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) with the assistance of Fe 2+ /KI to produce a stable green radical (ABTS ●+ ), which could be determined at four characteristic peaks (i.e., 415 nm, 650 nm, 732 nm, and 820 nm). The absorbances of ABTS ●+ at four peaks were well linear (R 2 > 0.999) with concentrations of both total peroxides (PAA + H 2 O 2 ) and PAA in the range of 0–40 μM under optimized conditions. The sensitivities for determining total peroxides at 415 nm, 650 nm, 732 nm and 820 nm were determined to be 4.248 × 10 4 M −1 cm −1 , 1.682 × 10 4 M −1 cm −1 , 2.132 × 10 4 M −1 cm −1 , and 1.928 × 10 4 M −1 cm −1 , respectively. For determining PAA, the corresponding sensitivities were 4.622 × 10 4 M −1 cm −1 , 1.895 × 10 4 M −1 cm −1 , 2.394 × 10 4 M −1 cm −1 and 2.153 × 10 4 M −1 cm −1 , respectively. The concentration of coexistent H 2 O 2 was gained by deducting PAA concentration from total peroxides concentration. The ABTS method was accurate enough to determine PAA concentration in natural water samples. Moreover, the ABTS method was successfully used to determine the changes of PAA and coexistent H 2 O 2 and to distinguish their role on naproxen degradation in heat-activated PAA process. Overall, the ABTS method could be used as an alternative method for the convenient, rapid and sensitive determination of PAA and the coexistent H 2 O 2 in water samples.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Runyu Zhou,Yongsheng Fu,Gaofeng Zhou,Shixiang Wang,Yiqing Liu
In this study, a novel Fe/Co bimetallic spinel sulfide (FeCo 2 S 4 ) modified g-C 3 N 4 composite (FeCo 2 S 4 -CN) was prepared by a hydrothermal method and firstly applied as a catalyst for the activation of peracetic acid (PAA) at neutral pH. The efficient rhodamine B (RhB) degradation in FeCo 2 S 4 -CN/PAA system indicated that PAA was successfully activated by FeCo 2 S 4 -CN. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) results indicated that g-C 3 N 4 carrier could anchor FeCo 2 S 4 particles with good dispersion. The X-ray photoelectron spectroscopy (XPS) analysis suggested that the surface ≡Co(II) and ≡Fe(II) could activate PAA to form CH 3 C(O)O • and • OH, synchronously yielding ≡Co(III) and ≡Fe(III). Meanwhile, the surface ≡Co(III) and ≡Fe(III) could also react with PAA to generate CH 3 C(O)OO • as well as ≡Co(II) and ≡Fe(II), resulting in the redox cycles of ≡Co(II)/≡Co(III) and ≡Fe(II)/≡Fe(III). Besides, the presence of S 2- in FeCo 2 S 4 -CN was favorable to these redox cycles. Radical scavenging experiments confirmed that organic radicals (i.e., CH 3 C(O)O • and CH 3 C(O)OO • ) were the primary reactive species for RhB degradation in FeCo 2 S 4 -CN/PAA system. This system also exhibited a high removal efficiency for various organic contaminants, suggesting its potential application in degrading refractory pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jingwen Wang,Yu Yang,Lei Chen,Yanping Ding,Linli Tan,Qiulin Shi,Yong Liu,Pengchao Xie
Molybdenum disulfide (MoS 2 ) is viewed as a promising two-dimensional Fenton-like catalyst, but the basal plane could not be well applied in peroxides activation. In this study, Fe(III) species were atomically impregnated on the MoS 2 basal plane to enhance peracetic acid (PAA) activation. The surface Fe(III) up shifted the d-band centre of MoS 2 and acted as electron shuttles in breaking the O-O bonds of PAA. HO • , CH 3 COO • and Fe(V) were generated in the Fe(III)-MoS 2 /PAA system, whereas the 1 O 2 production was inhibited on the Fe(III)-MoS 2 surface. Sulfamethazine (SMT) was efficiently degraded by Fe(III)-MoS 2 /PAA during 15 min reaction, with the observed removal efficiencies of SMT by Fe(III)-MoS 2 ( k obs ) being 25-fold higher than that by MoS 2 . Increasing the dosages of PAA and Fe(III)-MoS 2 facilitated SMT degradation, and high removal rate of SMT was achieved in the pH range of 3–5. HO • and Fe(V) were identified as critical reactive species responsible for the SMT degradation. Nitrification and Smiles rearrangement were proposed as the degradation pathways of SMT based on the identified oxidation products. This study demonstrates that impregnating Fe species would be an effective strategy for strengthening the Fenton-like reactivity of MoS 2 .
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 5
·410
·
IF 4
Jinxiang Gao,Peishan Yang,Mingxin Zhu,Hua Zhou,Shunlong Pan
The residual emerging pollutants in secondary effluent from a chemical industry park contain potential risks for natural waters. Herein, the cobalt ferrite/peracetic acid system was employed to destroy aniline, a typical emerging pollutant, with a reaction rate of 0.0147 min−1at pH 7.0. Singlet oxygen (1O2) served as the predominant reactive species for aniline degradation, with superoxide radicals (O2−) and organic radicals (R-O) acting in secondary roles. The valence transition between Co(II) and Co(III) on the CoFe2O4surface played a determining role in the reaction progression. The presence of anions and humic acids with low concentrations had minimal impact on aniline removal. Additionally, the CoFe2O4catalyst demonstrated excellent recyclability, maintaining a pollutant removal rate above 93% over five consecutive cycles. Lastly, the CoFe2O4/PAA system demonstrates effective treatment of typical pollutants, including phenolic compounds, pesticides, antibiotics, and dyes, achieving removal rates of 77.48% to 99.99%. Furthermore, it significantly enhances water quality in the treatment of actual secondary effluent, offering a novel theoretical foundation and practical insights for applying this catalytic system in wastewater treatment.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jie Dong,Weihua Xu,Shaobo Liu,Youzi Gong,Ting Yang,Li Du,Qiang Chen,Xiaofei Tan,Yunguo Liu
The conversion of biomass wastes to highly efficient biochar-based catalysts has attracted more and more attention because it meets the environmental protection concept of waste recycling. In this work, a novel magnetic catalyst (CoFe 2 O 4 @BC) was developed by using alkaline lignin, the dominant by-products of papermaking industry, as feedstock for biochar. More importantly, PAA (CH 3 C(=O) OOH) was successfully activated by CoFe 2 O 4 @BC nanoparticles for sulfamethoxazole (SMX) elimination. The catalytic activity of CoFe 2 O 4 @BC on PAA activation was systematically studied. When PAA was 825 μM and CoFe 2 O 4 @BC was 100 mg/L, 10 mg/L SMX could be completely degraded. The cycle of Co 3+ /Co 2+ of CoFe 2 O 4 @BC prompted the generation of acetyl(per)oxyl groups (CH 3 C(O)O• and CH 3 C(O)OO•), which were believed to be the dominant reactive substances for SMX degradation. The degradation of SMX was promoted under near-neutral pH conditions, and was inhibited when humic acid and HCO 3 − were added, while the Cl − showed a negligible influence. According to the analysis of oxidation products, three main transformation pathways of SMX were illustrated. The remarkable stability and magnetic separability of CoFe 2 O 4 @BC make it have a wider application prospect in the treatment of various wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 14
·1930-1938
·
IF 2.378
Junyang Xiao,Mengyun Wang,Zijun Pang,Lin Dai,Jinfeng Lu,Jing Zou
Recently, increasing attention has been paid for using commercial peracetic acid (PAA) solution as an efficient disinfectant or a strong oxidant in water treatment. Simultaneous determination of PAA and hydrogen peroxide (H2O2) is vital because PAA solution is commonly available as a mixed solution containing the peroxides PAA and H2O2. In this study, a simple, rapid and reliable spectrophotometric method for the simultaneous determination of PAA and H2O2 was developed. This method was based on the rapid oxidation of excess potassium iodide by PAA and H2O2 in the presence of ammonium molybdate to yield yellow-colored triiodide ions (I3−) that could be quantitatively measured using an UV-Vis spectrophotometer. The absorption of generated I3− at 350 nm increased linearly (R2 > 0.999) with the concentrations of total peroxides and PAA in the range of 0–70 μM. The sensitivities were respectively measured to be as high as 2.596 × 104 M−1 cm−1 for total peroxides and 2.616 × 104 M−1 cm−1 for PAA, while the corresponding limits of detection were calculated to be as low as 0.19 μM and 0.18 μM. The concentration of the H2O2 coexisting in PAA solution was obtained by subtracting the concentration of PAA from the concentration of total peroxides. The concentrations of total peroxides, PAA and H2O2 in practical water samples measured with this proposed method were in good agreement with the values measured with the earlier reported spectrophotometric method using N,N-diethyl-p-phenylenediamine as the indicator. Therefore, this proposed spectrophotometric method could be considered as an alternative method for the simultaneous determination of PAA and H2O2 coexisting in PAA solution.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 17
·9907-9916
·
IF 3.119
Li Zhang,Yiqing Liu,Yongsheng Fu
In this work, the degradation kinetics and mechanism of diclofenac (DCF) by UV/peracetic acid (PAA) was investigated. The effects of pH, PAA dose and common water components such as inorganic ions and dissolved organic matter (DOM) on DCF degradation by UV/PAA were also evaluated. It was observed that the addition of PAA promoted the photodegradation of DCF due to the generation of reactive radicals in the photolysis of PAA, which was also confirmed by the radical scavenging experiment. The best degradation efficiency of DCF was obtained at pH 8.5. The removal of DCF was enhanced gradually with increasing PAA dose. Since NO3− is a photosensitive substance which can generate HO˙ under UV irradiation, its existence promoted the degradation of DCF. The presence of CO32− could slightly improve DCF degradation, which might be due to the role of generated carbonate radicals. Cl−, SO42− and Fe3+ had little effect on DCF removal, while Cu2+ could enhance DCF degradation because of its catalytic ability for PAA decomposition. An inhibition effect on DCF removal was observed in the presence of DOM, and it was more obvious in higher concentration of DOM. The elimination of total organic carbon (TOC) was low. According to the twelve reaction products detected in the UV/PAA system, the probable transformation mechanism of DCF was proposed exhibiting eight reaction pathways, i.e., hydroxylation, decarboxylation, formylation, dehydrogenation, dechlorination–hydrogenation, dechlorination–cyclization, dechlorination–hydroxylation and amidation. This study indicates that UV/PAA is a promising method for DCF removal from contaminated water.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Changjie Shi,Yong Wang,Kai Zhang,Eric Lichtfouse,Cong Li,Yunshu Zhang
Pollution of wastewater and natural waters by organic contaminants is a major health issue, yet actual remediation methods are limited by incomplete removal of recalcitrant contaminants and by secondary pollution by chlorinated contaminants and catalytic metals. To attempt to solve these issues, we tested the removal of acid orange by peracetic acid (PAA), a safe oxidant , activated by Fe-biochar that iron anchored on biochar to prevent secondary pollution by iron. Fe-biochar was synthesized using a simple, one-step pyrolysis method. We investigated the effects of PAA concentration, pH, humic acids , chloride, bicarbonate on the reaction. Radical quenching and electron paramagnetic resonance were used to identify reacting species. Results showed that the granulous structure of Fe-biochar and the presence of Fe, Fe 3 O 4 , Fe 2 O 3 , and Fe 3 C on Fe-biochar surface. The highest removal of acid orange of 99.9% was obtained with 1.144 mM PAA and 0.3 g/L Fe-biochar at pH 7. Acid orange removal increases with Fe-biochar dose, decreases with pH, is slightly inhibited by humic acids and bicarbonate, and is not modified by chloride. Our experimental results suggested that CH 3 C(O)OO· and CH 3 C(O)O· are the main radical species, but there may also be non-radical effects in Fe-biochar/PAA process. Fe-biochar displayed high re-usability, with 92.8% removal after five uses.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yun-fei Zhang,Xin Quan,Sheng-gui Chen,Jian-hui Xu,Dan Li,Lei Li,Si-hao Lv,Jin-ze Li,Yi-hang Zhang,Zhuo-wei Zhong
In this study, silicon nitride-zero-valent iron (Si 3 N 4 -ZVI) powders were obtained through post-milling and employed as a catalyst to activate peracetic acid (PAA) for the removal of Ranitidine (RAN). The system achieved an impressive 90.4 % of degradation efficiency, with a pseudo-first-order kinetic reaction constant 11.3 times higher than that of the ZVI/PAA system. Quenching experiments and Electron Paramagnetic Resonance (EPR) analysis confirmed that both radical and non-radical processes are involved in RAN degradation within the Si 3 N 4 -ZVI/PAA system. Moreover, the identified ten degradation products are less toxic compared to the byproducts from alternative oxidation methods reported by prior literature. The proposed degradation pathway of RAN includes C S cleavage, oxygenation/hydroxylation demethylation, and denitrification. Furthermore, the Si 3 N 4 -ZVI/PAA system showed effectively in treating RAN-contaminated surface water, artificial wastewater, and dissolved organic matter, demonstrating its great ability in treating diverse organic-contaminated water sources. In conclusion, results of this study suggest that the Si 3 N 4 -ZVI/PAA system possess high pollutant removal efficiency, broad applicability, and less environmental and health risks.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Longqian Wang,Jingya ye,Jingyi Zhang,Qinglong Meng,Xiaoyu Li,Zhonglin Chen,Huahu Yu,Ao Zhang,Zhuoyu Bu,Yongli Jiao,Yuwei Pan
Peracetic acid (PAA) was successfully activated by UV and Fe 0 to degrade sulfamethazine (SMT) in this study. UV/Fe 0 /PAA system not only could enhance SMT removal efficiency but also could reduce the energy consumption in comparison with UV, Fe 0 /PAA and UV/PAA systems. The R O • radical was the main radical for the degradation of SMT in UV/Fe 0 /PAA system and photolysis, • OH and R-O • exhibited 15.6%, 17.6% and 66.8% contribution for SMT degradation, respectively. Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscope (SEM), and X-ray photoelectron spectroscopy (XPS) were conducted to investigate the characterization of Fe 0 after reaction in UV/Fe 0 /PAA system. The possible SMT degradation pathway was also proposed. Affecting factors such as Fe 0 dosage (0–0.2 g L −1 ), PAA concentration (0–200 μM) and initial pH (3–9) were also studied. Cl − , NO 3 - , SO 4 2- and HCO 3 - had a negligible adverse effect on SMT removal in this system indicating the good adaptability to inorganic ions. In addition, UV/Fe 0 /PAA system had the good recycle ability of Fe 0 and showed a good performance in removing antibiotic in the nature fresh water. Therefore, this study notably improved the knowledge of PAA activated by Fe 0 and UV and showed the potential applicability of UV/Fe 0 /PAA system in degrading antibiotics in nature fresh water.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 30
·76157-76170
·
IF 5.8
Shao Shujing,Zhang Pengyu,Chen Yang,Zhao Xiaodan
Iron-based heterogeneous catalysts due to the environmental friendliness have been widely studied for activation of peracetic acid (PAA) for abatement of organic contaminants in the water and wastewater treatment. However, the slow reduction from Fe(III) to Fe(II) of the iron-based catalysts as the rate-limiting step results in the low PAA activation efficiency. With regard to the excellent electron-donating capability of the reductive sulfur species, sulfidized nanoscale zerovalent iron is proposed for PAA activation (simplified as the S-nZVI/PAA process) and the tetracycline (TC) abatement efficacy and mechanism of this process are elucidated. The optimal sulfidation ratio (S/Fe) of S-nZVI is 0.07, which exhibits superior performance in PAA activation for TC abatement with the efficiency of 80–100% in the pH range of 4.0–10.0. The radical quenching experiments and oxygen release measurements confirm that acetyl(per)oxygen radicals (CH 3 C(O)OO•) are the main radical contributing to TC abatement. The influence of sulfidation on the crystalline structure, hydrophobicity, corrosion potential, and electron transfer resistance of S-nZVI is evaluated. The main sulfur species on the S-nZVI surface are identified as ferrous sulfide (FeS) and ferrous disulfide (FeS 2 ). The analysis by X-ray photoelectron spectroscopy (XPS) and Fe(II) dissolution suggest that the reductive sulfur species can accelerate the conversion from Fe(III) to Fe(II). In summary, the S-nZVI/PAA process exhibits application prospects for the abatement of antibiotics in the aquatic environments. Graphical Abstract
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Chen-Yan Hu,Li-Li Hu,Zheng-Yu Dong,Xin-Yu Yang,Hao Liu,Jia-Nan Chen,Ling-Mei Gao
Krypton chloride (KrCl*) excimer lamps (222 nm) are used as a promising irradiation source to drive ultraviolet-based advanced oxidation processes (UV-AOPs) in water treatment. In this study, the UV 222 /peracetic acid (PAA) process is implemented as a novel UV-AOPs for the degradation of emerging contaminants (ECs) in water. The results demonstrate that UV 222 /PAA process exhibits excellent degradation performance for carbamazepine (CBZ), with a removal rate of 90.8 % within 45 min. Notably, the degradation of CBZ in the UV 222 /PAA process (90.8 %) was significantly higher than that in the UV 254 /PAA process (15.1 %) at the same UV dose. The UV 222 /PAA process exhibits superior electrical energy per order (EE/O) performance while reducing resource consumption associated with the high-energy UV 254 /PAA process. Quenching experiments and electron paramagnetic resonance (EPR) detection confirm that HO• play a dominant role in the reaction. The contributions of direct photolysis, HO•, and other active species (RO• and 1 O 2 ) are estimated to be 5 %, 88 %, and 7 %, respectively. In addition, the effects of Cl − , HCO 3 − , and humic acid (HA) on the degradation of CBZ are evaluated. The presence of relatively low concentrations of Cl − , HCO 3 − , and HA can inhibit CBZ degradation. The UV 222 /PAA oxidation process could also effectively degrade several other ECs (i.e., iohexol, sulfamethoxazole, acetochlor, ibuprofen), indicating the potential application of this process in pollutant removal. These findings will propel the development of the UV 222 /PAA process and provide valuable insights for its application in water treatment.
研究领域:
环境科学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）