Enhanced simultaneous removal of acetamiprid and cadmium from soil and water in paddy fields by Fe-Mn-BC ternary micro-electrolysis: Performance, mechanism and pathway
Fanlong Kong, Deliang Chen, Tianyu Zhai, Wenpeng Wang, Guoxian Yang, Yile Dai, Yuqian Cui, Boyang Wei, Sen Wang
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引用次数: 0
Abstract
Acetamiprid (Ace) and cadmium (Cd) in paddy fields had caused serious impact on natural ecosystems and human health. In this study, Fe-Mn-BC ternary micro-electrolysis filler was successfully prepared and used to remove Ace and Cd in situ in paddy fields via constructing “Fe-Mn-BC micro-electrolysis-microorganism” system. The adsorption capacity of Fe-Mn-BC on Cd and Ace were 62.92 mg/g and 236.18 mg/kg, which were twice and six times than those of zeolites, respectively. In the laboratory simulated experiments, the removal efficiencies of Ace and Cd in CW with Fe-Mn-BC were around 85.0 %. The Ace was decomposed into macromolecular substances by electron transfer in the anodic oxidation process by Fe-Mn-BC and then degraded to water and carbon dioxide by microorganism, while Cd was mainly removed through adsorption of filler and microorganism and the coprecipitation with OH– form cathode and Fen+ from anode to form CdXFe(1-X)(OH)2. The introduce of Fe-Mn-BC promoted the production of microbial extracellular polymeric substances (mainly protein), favorable for Cd and Ace adsorption. Metagenomic sequencing results showed that the Fe-Mn-BC enriched the microorganism related to Ace degradation such as Streptomyces, Nonomuraea, Pseudonocardia, and Nocardia, and enhanced the relative abundances of Cd resistance genes (ABC.CD.P, ABC-2.A and ABC-2.P), and the Ace degradation genes (mcp, pht5, etbAa, TENA_E, and ylmB), promoting the removal of Ace and Cd. This study proposed a multi-functional and easy-operated way for the removal of Ace and Cd from soil and water in paddy fields.
期刊介绍：
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.
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