摘要
为发展一种高效去除邻苯二甲酸二乙酯(DEP)的技术,以经过一定处理的硫化铜(CuS)为活化剂,过氧化氢(H2O2)作为氧化剂,利用CuS活化分解H2O2产生高活性羟基自由基降解邻苯二甲酸二乙酯。DEP浓度利用高效液相色谱定量,CuS表面的元素价态变化通过XPS(X射线光电子能谱)测试分析,CuS固体通过XRD(X射线衍射)等手段表征,羟基自由基(·OH)通过EPR(电子顺磁共振)分析。结果表明,CuS可以活化H2O2产生羟基自由基去除DEP,硝酸处理前的CuS活化H2O2的能力要强于处理后的CuS。随着体系中H2O2的浓度不断提高,CuS/H2O2体系去除DEP的能力也不断增强。研究表明,CuS是一类很好的H2O2活化剂,·OH是该体系降解污染物的主要活性物质。
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.
作者
吴根华
王肖磊
方国东
王玉军
周东美
WU Gen-hua;WANG Xiao-lei;FANG Guo-dong;WANG Yu-jun;ZHOU Dong-mei(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)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2020年第11期2532-2538,共7页
Journal of Agro-Environment Science
基金
江苏省自然科学基金项目(BK20170050)
国家自然科学基金项目(41671478)
国家重点研发计划项目(2017YFA0207001)。
