期刊论文

Zeng, Weimin

英文

Science of The Total Environment

0048-9697

2022

808

152067

10.1016/j.scitotenv.2021.152067

CRediT authorship contribution statement Tangjian Peng: Conceptualization, Methodology, Investigation, Visualization, Writing – original draft, acquisition. Wanqing Liao: Investigation, Software, Data curation. Guohua Gu: Supervision, Writing – review & editing. Guanzhou Qiu: Supervision, Validation. Xueling Wu: Formal analysis, Writing – review & editing. Fei Yang: Conceptualization, Methodology, Writing – review & editing. Weimin Zeng: acquisition, Supervision, Writing – review & editing. Acknowledgments This work was supported by the China Postdoctoral Science Foundation (grant number 2019M662802), postdoctoral research funding plan in Hunan province (grant number 207159) and Central South University (grant number 140050014), and the National Natural Science Foundation of China (grant numbers 31900108 and 81773393).

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Extracellular polymeric substances (EPS) participate in heavy metal adsorption in the aquatic environments. Extracellular DNA (eDNA) is an essential component of EPS, but its involvement in metal binding remains ambiguous. Herein, the role of eDNA in Cd(II) and Ni(II) adsorption was described using a combination of semi-quantitative and qualitative approaches. EPS were extracted from Burkholderia sp. MBR-1 and eDNA accounted for 6.9% of the total mass of EPS. The eDNA in the extracted EPS was digested using the DNase II to prepare an eDNA-free EPS sample. Potentiometric titration unveiled that...