CHEMICAL ENGINEERING SCIENCE
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2025
·
IF 4.3
Usman Farooq,Xudong Hu,Jingyi Shang,Shuang Li,Jun Long,Lin Wang,Xinhai Wang
The increasing presence of pharmaceutical contaminants, such as dipyrone (DIP), in water systems highlights the urgent need for innovative and sustainable remediation technologies. This study examined the degradation of DIP using a chalcopyrite (CP)-activated peracetic acid (PAA) system, highlighting its potential for the removal of pharmaceutical pollutants. Experimental and statistical parameter optimization suggested that approximately 85.5 % of DIP degradation and 60 % of mineralization were achieved with CP (4 g/L) and PAA (10 mM) at neutral pH. Scavenger and probe experiments confirmed the presence of hydroxyl radicals ( • OH) and alkyl radical species in the CP/PAA system, but •OH was the primary contributor to DIP degradation. The surface-active sites confirmed that heterogeneous Cu(I) exerted more significant influence than Fe (II) of CP, producing 4.21 and 2.35 mg/L, respectively. The presence of reductive sulfur species in the CP allowed the capture of additional protons, creating sulfur vacancies and further strengthening the cycling of Cu and Fe species. DFT analysis confirmed that the FeCuS 2 -Fe adsorption energy (−3.71 eV) and the HOMO-LUMO gap of FeCuS 2 -Fe (0.03 eV) were critical to produce radicals. The CP/PAA system is suitable for DIP degradation and contributes significantly to the degradation of other environmental pollutants. It retained its capacity to degrade above 65 % for up to five consecutive cycles, offering a new and innovative method for water treatment.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 19
·6385
·
IF 4.927
Chengzhi Yu,Libin Zheng,Yongyuan Hong,Jiabin Chen,Feng Gao,Yalei Zhang,Xuefei Zhou,Libin Yang
Advanced oxidation processes (AOPs) demonstrate great micropollutant degradation efficiency. In this study, CuFe2O4was successfully used to activate peracetic acid (PAA) to remove Rhodamine B. Acetyl(per)oxyl radicals were the dominant species in this novel system. The addition of 2,4-hexadiene (2,4-HD) and Methanol (MeOH) significantly inhibited the degradation efficiency of Rhodamine B. The ≡Cu2+/≡Cu+redox cycle dominated PAA activation, thereby producing organic radicals (R-O˙) including CH3C(O)O˙ and CH3C(O)OO˙, which accounted for the degradation of Rhodamine B. Increasing either the concentration of CuFe2O4(0–100 mg/L) or PAA (10–100 mg/L) promoted the removal efficiency of this potent system. In addition, weakly acid to weakly alkali pH conditions (6–8) were suitable for pollutant removal. The addition of Humid acid (HA), HCO3−, and a small amount of Cl−(10–100 mmol·L−1) slightly inhibited the degradation of Rhodamine B. However, degradation was accelerated by the inclusion of high concentrations (200 mmol·L−1) of Cl−. After four iterations of catalyst recycling, the degradation efficiency remained stable and no additional functional group characteristic peaks were observed. Taking into consideration the reaction conditions, interfering substances, system stability, and pollutant-removal efficiency, the CuFe2O4/PAA system demonstrated great potential for the degradation of Rhodamine B.Keywords:peracetic acid (PAA);rhodamine B;copper ferrite (CuFe2O4);organic radicals (R-O˙)
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
WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 2
·1-12
·
IF 3
Zhu Xiao,Yu Cao,Zhu Mingxin,Zhou Hua,Pan Shunlong
The advanced peracetic acid (PAA) oxidation technology has a wide application prospect in the field of wastewater treatment for its high efficiency, environmental protection and wide application. In this work, cobalt tetraferrote (CoFe 2 O 4 ) was used to activate PAA to degrade acid red B. The effects of CoFe 2 O 4 catalyst dosage, PAA concentration, initial pH value and anion on the decolorization efficiency of acid red B were investigated by intermittent single factor experiments. The optimal reaction conditions for the degradation of 0.1 mM acid red B in the CoFe 2 O 4 /PAA system were as follows: catalyst dosage of 0.008 g, PAA concentration of 1 mM, and initial pH = 7. After 30 min of reaction, the degradation rate of acid red B reached was as high as 99.5%. The coexistence of CoFe 2 O 4 /PAA with low concentrations of anions and humic acid (HA) had negligible effects on the catalysis of acid red B, while the coexistence with higher concentrations of HCO 3 − , H 2 PO 4 − and HA inhibited the degradation behaviors. Quenching experiments confirmed that there were a large amount of R-O• and a small amount of •OH in the CoFe 2 O 4 /PAA system, and 1 O 2 played an important role in the degradation process. After 6 cycles, the catalytic performance of CoFe 2 O 4 remained above 98.6%, showing stable catalytic performance, which were also confirmed by FTIR and XPS. This work provided a new way for effectively treating azo dye containing waste water.
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
高影响因子
ORGANIC PROCESS RESEARCH & DEVELOPMENT
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2018
·
IF 3.584
Juncheng Jiang,Fusheng Cui,Saili Shen,Xiuxia Guo,Lei Ni,Yong Pan
In this study, in order to assess thermal runaway risk of two step synthesis reactions, two new risk assessment methods were proposed by combining the new assessment procedure with the risk matrix and the Stoessel criticality diagram. The thermal runaway risks of the tert-butyl peroxybenzoate (TBPB) synthesis process and the tert-butyl peracetate (TBPA) synthesis process, and the influence of the use of the pure target products on the assessment results were also studied by the new methods. The results showed that the new methods could obtain more accurate assessment results of two step synthesis reactions. Some measures should be taken to reduce the thermal runaway risks of the two synthesis processes. Furthermore, the use of the pure target products in the new methods would exaggerate the thermal runaway risks of the two step synthesis reactions.
研究领域:
化学工程
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安全科学
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过程安全
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）