title: Dissolved microcystins in surface and ground waters in regions with high cancer incidence in the Huai River Basin of China.
abstract: Microcystins (MCs) are potent hepatotoxins and have also implicated in liver tumor promotion. The present study investigates the temporal and spatial variations of MCs in different water bodies in the Huai River Basin in China. Water samples including rivers, ponds and wells were collected every quarter during December 2008 and December 2009. MCs were determined by high pressure liquid chromatography after solid phase extraction. MCs concentrations in river samples were 0.741±0.623μgL(-1) with maximum of 1.846μgL(-1). MCs in pond were 0.597±0.960μgL(-1) with maximum of 2.298μgL(-1). MCs were also detected in 51.7% of the groundwater samples, MCs in groundwater were 0.060±0.085μgL(-1) with maximum of 0.446μgL(-1). MCs concentrations in groundwater did not differ significantly among different depths or towns (Wilcoxon test, p>0.05). The average MCs in groundwater in each sampling period were 0.068μgL(-1), 0.118μgL(-1), 0.052μgL(-1), 0.059μgL(-1) and 0.020μgL(-1). Through multi linear regression, the best fit model was built on MCs in groundwater with River B (R(2)=0.13, p<0.05), rather than with pond water. The results suggested that MCs contamination in groundwater originated from rivers, causing potential health risk on population who drink groundwater directly.
authors: Key Laboratory of Public Health and Safety, Ministry of Education, Department of Environmental Health, School of Public Health, Fudan University, P.O. Box 249, Yi Xue Yuan Road 138, Shanghai 200032, China.
authors: Dajun
authors: D
authors: Tian
authors: Weiwei
authors: W
authors: Zheng
authors: Xiao
authors: X
authors: Wei
authors: Xin
authors: X
authors: Sun
authors: Li
authors: L
authors: Liu
authors: Xin
authors: X
authors: Chen
authors: Hao
authors: H
authors: Zhang
authors: Yin
authors: Y
authors: Zhou
authors: Hanyi
authors: H
authors: Chen
authors: Hongmei
authors: H
authors: Zhang
authors: Xia
authors: X
authors: Wang
authors: Rongjie
authors: R
authors: Zhang
authors: Songhui
authors: S
authors: Jiang
authors: Yuxin
authors: Y
authors: Zheng
authors: Gonghuan
authors: G
authors: Yang
authors: Weidong
authors: W
authors: Qu
mesh_terms: D002681:China; D004781:Environmental Exposure / Q000706:statistics & numerical data*; D004784:Environmental Monitoring; D060587:Groundwater / Q000737:chemistry* / Q000382:microbiology; D006801:Humans; D015994:Incidence; D052998:Microcystins / Q000032:analysis*; D009369:Neoplasms / Q000453:epidemiology*; D018570:Risk Assessment; D045483:Rivers / Q000737:chemistry* / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D052998:Microcystins; D014874:Water Pollutants, Chemical