School of Environmental Sciences, Mahatma Gandhi University, Kerala, India; National Centre for Earth Science Studies, Thiruvananthapuram, Kerala, India.
School of Environmental Sciences, Mahatma Gandhi University, Kerala, India.
Mar Pollut Bull. 2019 Aug;145:490-498. doi: 10.1016/j.marpolbul.2019.06.034. Epub 2019 Jun 25.
Trace metal contamination in aquatic ecosystems is of significant concern in countries like India having a recent industrial history. The present study mainly focuses on the spatial and temporal distribution, occurrence and toxicity of five trace metals (Hg, Cd, Zn, Cu and Pb) in water and sediment matrix of Vembanad Lake system (VLS), India. Mercury analysis was done by using Cold Vapor Atomic Fluorescence Spectrometer, and the other metals were analysed using Volta metric-Trace metal analyser. The spatial distribution of trace metals in the study area showed the following trends, Zn > Pb > Cu > Cd > Hg, Zn > Pb > Cu > Hg > Cd for surface water and bottom water respectively. Health risk assessment on human population associated with trace metals was also calculated to predict their health impacts on human through non-dietary exposure. The trace metals contamination in water and sediments of VLS are potential to cause cancer on human population associated with the system. Ecological risk indices showed that the northern portion of VLS is more contaminated with trace metal than the other part of the system.
在印度这样一个工业历史较新的国家，水生生态系统中的痕量金属污染是一个值得关注的问题。本研究主要集中于研究印度维姆班纳德湖系统（VLS）中水体和沉积物基质中五种痕量金属（汞、镉、锌、铜和铅）的时空分布、存在和毒性。汞的分析采用冷原子荧光光谱法，其他金属采用伏打式痕量金属分析仪进行分析。研究区域痕量金属的空间分布呈现以下趋势：Zn＞Pb＞Cu＞Cd＞Hg，对于地表水和底层水，分别为 Zn＞Pb＞Cu＞Hg＞Cd。还计算了与痕量金属相关的人类群体的健康风险评估，以预测通过非饮食暴露对人类健康的影响。VLS 水和沉积物中的痕量金属污染可能对与该系统相关的人类群体造成癌症风险。生态风险指数显示，VLS 的北部区域比系统的其他部分受到更多的痕量金属污染。
