Effectiveness of chelating agent-assisted Fenton-like processes on remediation of glucocorticoid-contaminated soil using chemical and biological assessment: performance comparison of CaO2 and H2O2
文献类型： 外文期刊
作者： Liu, Yanan 1 ; Zhou, Quan 1 ; Li, Zhenyu 1 ; Zhang, Ai 1 ; Zhan, Jiaxun 1 ; Miruka, Andere Clement 1 ; Gao, Xiaoting 1 ;
作者机构： 1.Donghua Univ, Coll Environm Sci & Engn, 2999 North Renmin Rd, Shanghai 201620, Peoples R China
2.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China
关键词： Glucocorticoid degradation; Fenton-like processes; CaO2 oxidation; Soil remediation; Microbial communities; Phytotoxic effects
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）
ISSN： 0944-1344
年卷期： 2021 年 28 卷 47 期
页码：
收录情况： SCI
摘要： Glucocorticoids (GCs) have drawn great concern due to widespread contamination in the environment and application in treating COVID-19. Most studies on GC removal mainly focused on aquatic environment, while GC behaviors in soil were less mentioned. In this study, degradation of three selected GCs in soil has been investigated using citric acid (CA)-modified Fenton-like processes (H2O2/Fe(III)/CA and CaO2/Fe(III)/CA treatments). The results showed that GCs in soil can be removed by modified Fenton-like processes (removal efficiency gt; 70% for 24 h). CaO2/Fe(III)/CA was more efficient than H2O2/Fe(III)/CA at low oxidant dosage (< 0.28-0.69 mmol/g) for long treatment time (> 4 h). Besides the chemical assessment with GC removal, effects of Fenton-like processes were also evaluated by biological assessments with bacteria and plants. CaO2/Fe(III)/CA was less harmful to the richness and diversity of microorganisms in soil compared to H2O2/Fe(III)/CA. Weaker phytotoxic effects were observed on GC-contaminated soil treated by CaO2/Fe(III)/CA than H2O2/Fe(III)/CA. This study, therefore, recommends CaO2-based treatments to remediate GC-contaminated soils.
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