Bai He, Yang Yuxiang, Yuan Hongming, Liu Xiangnong, Ni Chaoying
School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, China.
Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716, USA.
Environ Sci Pollut Res Int. 2023 Jan;30(1):917-929. doi: 10.1007/s11356-022-22265-9. Epub 2022 Jul 30.
The presence of methoxychlor (MXC) in soil and wastewater is considered a nonnegligible environmental threat. Herein, FeO@Fe(0) was obtained by NaBH reduction of FeO nanoparticles and served as a carrier for laccase to construct catalyst. The catalyst was evaluated for the degradation of MXC in treated wastewater and soil with 2, 2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) being used as cocatalyst. The removal rate of MXC in wastewater and soil was found to be 89% and 88% in optimum conditions, and the influences of initial MXC concentration, pH, and temperature on the degradation rate were evaluated. The metabolites including 2-methylpentane, 3-methylpentane, and n-pentane of MXC were identified, and possible degradation mechanisms were proposed. Overall, this work successfully demonstrates not only the ability to degrade MXC in different circumstances but also provides a new idea for environmental remediation in the future.
土壤和废水中甲氧滴滴涕（MXC）的存在被认为是一个不可忽视的环境威胁。在此，通过硼氢化钠还原FeO纳米颗粒获得了FeO@Fe(0)，并将其用作漆酶的载体以构建催化剂。以2,2'-联氮-双（3-乙基苯并噻唑啉-6-磺酸）（ABTS）作为助催化剂，对该催化剂在处理后的废水和土壤中降解MXC的性能进行了评估。发现在最佳条件下，废水中MXC的去除率为89%，土壤中为88%，并评估了初始MXC浓度、pH值和温度对降解率的影响。鉴定了MXC的代谢产物，包括2-甲基戊烷、3-甲基戊烷和正戊烷，并提出了可能的降解机制。总体而言，这项工作不仅成功证明了在不同情况下降解MXC的能力，还为未来的环境修复提供了新思路。
