Manure application facilitated electrokinetic remediation of antibiotic-arsenic co-contaminated paddy soil

文献类型： 外文期刊

第一作者： Yan, Mengmeng

作者： Yan, Mengmeng;Zhu, Changxiong;Li, Binxu;Su, Shiming;Li, Hongna

作者机构：

关键词： Electrokinetic remediation; Pig manure; Antibiotic resistance genes (ARGs); Arsenic-contaminated paddy soil; Membrane transport

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：14.224； 五年影响因子：12.984 ）

ISSN： 0304-3894

年卷期： 2023 年 441 卷

页码：

收录情况： SCI

摘要： The co-existence of antibiotics and heavy metals in soil with manure application poses high risk to both envi-ronment and human health, and thus effective remediation methods are in urgent need. This study investigated the synergistic effects of electrokinetic remediation (EKR) on antibiotic resistance and arsenic (As) in co -contaminated paddy soils. EKR treatments in soil amended with pig manure (EKR-PD) showed better remedia-tion efficiency compared with that without pig manure. In detail, the content of available As and the abundance of antibiotic-resistant bacteria (ARB) decreased by 25.2 %-41.4 % and 9.5 %-21.1 % after 7-d remediation, respectively, due to a relatively higher current density for EKR-PD. The role of the electric field contributed to 33.9 % of antibiotic degradation. Antibiotic resistance genes (ARGs) with ribosomal-protection and enzymatic -deactivation types were easier to remove, with the removal ratio of 37.8 %-41.6 % in EKR-PD. Brevundimonas was the most significantly different species during remediation. Bacillus and Clostridium_ sensu_stricto_1 were potential host bacteria of ARGs in the electric field. Membrane transport might be an effective strategy for microorganisms to respond to the stress of both electric field and co-contaminated environments. This study supports the potential role of EKR in the co-contamination of heavy metals and antibiotic resistance under manure application.

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