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| Diethyl phthalate degradation by copper sulfide-activated hydrogen peroxide |
| Received:May 20, 2020 |
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| KeyWord:CuS;H2O2;diethyl phthalate;·OH;degradation |
| Author Name | Affiliation | E-mail | | WU Gen-hua | School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, China | | | WANG Xiao-lei | School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, China
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | FANG Guo-dong | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | gdfang@issas.ac.cn | | WANG Yu-jun | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | | ZHOU Dong-mei | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | |
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| Abstract: |
| Phthalates are ubiquitously detected in soil, water, and atmospheric environments, and pose great risks to humans, due to their potential carcinogenicity, teratogenicity, and hepatotoxicity. Thus, it is urgent to eliminate phthalates from the environment. In this study, an efficient method was developed to degrade diethyl phthalate (DEP)by using H2O2 activated by CuS. It was found that CuS activated H2O2 decomposition to produce hydroxyl radicals (·OH), which degraded DEP efficiently; more than 70% DEP (20 mg·L-1)was removed with 1.0 g·L-1 CuS and 20 mmol·L-1 H2O2 after 240 min. The degradation of DEP was enhanced with the increase in H2O2 concentrations. The underlying mechanism of H2O2 activation and DEP degradation were elucidated via XPS (X-ray photoelectron spectroscopy), XRD (X-ray diffraction), EPR (Electron paramagnetic resonance). The combined results suggest that surface electron transfer from Cu (Ⅰ)to H2O2 was the main factor contributing to H2O2 activation and·OH generation. The findings of this study provide a novel method for the degradation of organic pollutants in the environment. |
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