Heavy metal migration and risk transference associated with cyanobacterial blooms in eutrophic freshwater----中国科学院藻类生物学重点实验室

论文名称	Heavy metal migration and risk transference associated with cyanobacterial blooms in eutrophic freshwater
作者	Jia, Yunlu; Chen, Wei; Zuo, Yanxia; Lin, Lizhou; Song, Lirong
摘要	The distribution of metals in cyanobloom-forming lakes, and potential risks of these metals during irrigation with water derived from the bloom were evaluated in this study. Seven metals were monitored throughout a cyanobacterial bloom season in Lake Taihu. Cyanobloom bio-dilution of the targeted metals could be explained by the negative relationships between total phytoplankton metal contents (Cu, Fe, Zn, Pb and Cr) and Chl a concentrations (p < 0.05). Meanwhile, the ratios of extracellular bound to total cellular bound metals (Cu, Zn, Pb, Cr and Cd) were positively correlated with the ratios of cyanophyta to total phytoplankton (p < 0.01), indicating the enhanced extracellular bound of these metals during cyanobloom period. Secondly, Cd, Pb and Cr were detected in several local vegetables. In comparison to reference vegetables, vegetables (e.g., radish, soybean, and cowpea), which were irrigated with cyanobloom broth collected from Lake Taihu, presented high health risk index (HRI) and were not safe for human consumption. Collectively, the frequent dominant colonial Microcystis blooms which performed high metal affinity might mediate the distribution of heavy metals in lake and potentially transferred these pollutants into terrestrial system. (C) 2017 Published by Elsevier B.V.
卷	613
期
页码	1324-1330
发表时间	2018
刊物名称	SCIENCE OF THE TOTAL ENVIRONMENT
全文链接	http://dx.doi.org/10.1016/j.scitotenv.2017.09.180