Systematic and long-term technical validity of toxicity determination and early warning of heavy metal pollution based on an automatic water-toxicity-determination-system

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Yue Yi, Baoguo Wang, Xuemei Yi, Fan Zha, Haisen Lin, Zhijun Zhou, Yanhong Ge, Hong Liu
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Abstract

Water toxicity determination with electrochemically active bacteria (EAB) shows promise for providing early warnings for heavy metal pollution in water. However, thus far, only idealized tests with a few types of heavy metals have been conducted. In this study, an automatic water-toxicity-determination system with high technical maturity was established, and the toxicological properties of common heavy metals were systematically assessed. The results demonstrated that the common heavy metals linearly inhibited EAB currents in the range of 0.1 mg/L to 0.5 mg/L. The toxicity ranking of the tested heavy metals was Pb2+ > Tl3+ > Cu2+ > Cd2+ > Zn2+ > Ni2+ > Hg2+ > As2+. The toxicity interaction mainly exhibited an antagonistic effect in binary heavy metal mixtures. The system can accurately determine surface water toxicity and rapidly monitor heavy metal pollution, with good repeatability and a long lifetime. Overall, this study demonstrates that EAB are capable of long-term (> 60 d) surface water quality monitoring and on-site early warning of heavy metal pollution.

Abstract Image

基于水毒性自动测定系统的毒性测定和重金属污染预警的系统性和长期技术有效性
利用电化学活性细菌(EAB)测定水的毒性,有望对水中的重金属污染发出预警。然而,迄今为止,只对少数几种重金属进行了理想化的测试。本研究建立了一套技术成熟度较高的水毒性自动测定系统,并对常见重金属的毒理学特性进行了系统评估。结果表明,在 0.1 mg/L 至 0.5 mg/L 的范围内,常见重金属对 EAB 电流有线性抑制作用。被测重金属的毒性排序为 Pb2+ > Tl3+ > Cu2+ > Cd2+ > Zn2+ > Ni2+ > Hg2+ > As2+。在二元重金属混合物中,毒性相互作用主要表现为拮抗作用。该系统可准确测定地表水毒性,快速监测重金属污染,重复性好,使用寿命长。总之,这项研究表明,EAB 能够长期(60 d)监测地表水水质,并对重金属污染进行现场预警。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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