Dutta Joydev, Chetia Mridul, Misra A K
Department of Chemistry, Chaiduar College, Gohpur, Sonitpur--784 168, Assam, India.
J Environ Sci Eng. 2011 Oct;53(4):443-50.
Contamination of drinking water by arsenic and other heavy metals and their related toxicology is a serious concern now-a-days. Millions of individual world-wide are suffering from the arsenic and other heavy metal related diseases due to the consumption of contaminated groundwater. 60 water samples from different sources of 6 small tea gardens of Sonitpur district were collected to study the potability of water for drinking purposes. The water samples collected from sources like tube wells, ring wells and ponds were analyzed for arsenic, heavy metals like iron, manganese and mercury with sodium, potassium, calcium, magnesium, pH, total hardness, chloride, fluoride and sulphate. Some drain water samples of the tea garden areas were also collected to analyze the above mentioned water parameters to see the contamination level. Experiments revealed that 78% samples of total collection had arsenic content above the permissible limit (0.01 ppm) of WHO guideline value for drinking water. The highest arsenic was observed 0.09 ppm at one sample of Gobindra Dahal tea garden of Gohpur sub division of Sonitpur district. 94% samples had contamination due to manganese 39% samples had iron and 44% samples had Hg. The water quality data was subjected to some statistical treatments like NDA, cluster analysis and pearson correlation to observe the distribution pattern of the different water quality parameters. A strong pearson correlation coefficient was observed between parameters-arsenic and manganese (0.865) and arsenic and mercury (0.837) at 0.01 level, indicated the same sources of drinking water contamination.
如今，砷及其他重金属对饮用水的污染及其相关毒理学成为严重问题。全球数以百万计的人因饮用受污染的地下水而患上与砷及其他重金属相关的疾病。从索尼特布尔区6个小型茶园的不同水源采集了60份水样，以研究饮用水的适用性。对从管井、环井和池塘等水源采集的水样进行了砷、铁、锰、汞等重金属以及钠、钾、钙、镁、pH值、总硬度、氯化物、氟化物和硫酸盐的分析。还采集了一些茶园区域的排水水样，以分析上述水质参数，查看污染程度。实验表明，采集的所有水样中，78%的砷含量高于世界卫生组织饮用水准则值的允许限量（0.01 ppm）。在索尼特布尔区戈胡尔分区戈宾德拉·达哈尔茶园的一个水样中，观察到最高砷含量为0.09 ppm。94%的水样因锰污染，39%的水样因铁污染，44%的水样因汞污染。对水质数据进行了一些统计处理，如非参数检验、聚类分析和皮尔逊相关性分析，以观察不同水质参数的分布模式。在0.01水平上，观察到砷与锰（0.865）以及砷与汞（0.837）之间存在很强的皮尔逊相关系数，表明饮用水污染来源相同。
