Bioelectrochemical treatment of emerging contaminants and molecular characterization of transformation products in landfill leachate

Q1 Environmental Science

Bioresource Technology Reports Pub Date : 2025-05-19 DOI:10.1016/j.biteb.2025.102153

Sushma K. Varma , Rajesh Singh

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Abstract

The increasing environmental risk posed by emerging contaminants (ECs) in landfill leachate (LL) necessitates advanced monitoring and treatment strategies. This study aimed to identify and characterize approximately 100 ECs—including pharmaceuticals, pesticides, and industrial chemicals—and their transformation products (TPs) in LL and associated solid waste using suspect and non-target screening via LC-QTOF-MS. The treatment was conducted using a sulfate-reducing bacteria-based bio-electrochemical system (SRB-BES). Results revealed pharmaceuticals and diagnostic agents as the dominant ECs (27.27 %), followed by pesticides and herbicides (16.16 %). The integrated SRB-BES system effectively degraded several toxic compounds into less harmful TPs, such as the conversion of hydrocortisone acetate into cortisone. The study provides a comprehensive workflow for TP identification and demonstrates the SRB-BES system's potential for mitigating the ecological impact of legacy pollutants in mature landfills. These findings support the development of sustainable waste management solutions and improved contaminant surveillance frameworks.

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垃圾渗滤液中新兴污染物的生物电化学处理及转化产物的分子表征

垃圾渗滤液（LL）中新出现的污染物（ECs）所带来的环境风险日益增加，需要先进的监测和处理策略。本研究旨在通过LC-QTOF-MS进行可疑和非目标筛选，鉴定和表征LL和相关固体废物中的大约100种ec（包括药品、农药和工业化学品）及其转化产物（TPs）。采用硫酸盐还原细菌生物电化学系统（SRB-BES）进行处理。结果显示，药物和诊断制剂是主要的污染因子（27.27%），其次是农药和除草剂（16.16%）。集成的SRB-BES系统有效地将几种有毒化合物降解为危害较小的TPs，例如将醋酸氢化可的松转化为可的松。该研究为TP识别提供了一个全面的工作流程，并证明了SRB-BES系统在减轻成熟垃圾填埋场遗留污染物的生态影响方面的潜力。这些发现支持制定可持续废物管理解决方案和改进污染物监测框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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