Pandey P K, Sharma R, Roy M, Roy S, Pandey M
Department of Engineering Chemistry, Centre for Environmental Science and Engineering, Bhilai Institute of Technology, Durg, India.
Environ Geochem Health. 2006 Oct;28(5):409-20. doi: 10.1007/s10653-005-9039-4. Epub 2006 Jun 3.
This paper identifies newer areas of arsenic contamination in the District Kanker, which adjoins the District Rajnandgaon where high contamination has been reported earlier. A correlation with the mobile phase episodes of arsenic contamination has been identified, which further hinges on the complex geology of the area. Arsenic concentrations in both surface and groundwater, aquatic organisms (snail and water weeds) soil and vegetation of Kanker district and its adjoining area have been reported here. The region has been found to contain an elevated level of arsenic. All segments of the ecoysystem are contaminated with arsenic at varying degrees. The levels of arsenic vary constantly depending on the season and location. An analysis of groundwater from 89 locations in the Kanker district has shown high values of arsenic, iron and manganese (mean: 144, 914 and 371 microg L(-1), respectively). The surface water of the region shows elevated levels of arsenic, which is influenced by the geological mineralised zonation. The most prevalent species in the groundwater is As(III), whereas the surface water of the rivers shows a significant contamination with the As(V) species. The analysis shows a bio-concentration of the toxic metals arsenic, nickel, copper and chromium. Higher arsenic concentrations (groundwater concentrations greater than 50 microg L(-1)) are associated with sedimentary deposits derived from volcanic rocks, hence mineral leaching appears to be the source of arsenic contamination. Higher levels of arsenic and manganese in the Kanker district have been found to cause impacts on the flora and fauna. A case study of episodic arsenical diarrhoea is presented.
本文确定了坎克区砷污染的新区域，该区域毗邻拉杰南德冈区，此前已报告该区域存在高污染情况。已确定与砷污染的流动相事件存在关联，这进一步取决于该地区复杂的地质情况。本文报告了坎克区及其毗邻地区地表水、地下水、水生生物（蜗牛和水草）、土壤和植被中的砷浓度。已发现该地区砷含量升高。生态系统的所有部分都受到不同程度的砷污染。砷含量因季节和地点而异。对坎克区89个地点的地下水分析显示，砷、铁和锰含量较高（平均值分别为144、914和371微克/升）。该地区地表水的砷含量升高，这受到地质矿化分区的影响。地下水中最普遍的物种是As(III)，而河流地表水显示As(V)物种受到严重污染。分析表明有毒金属砷、镍、铜和铬存在生物富集现象。较高的砷浓度（地下水浓度大于50微克/升）与火山岩衍生的沉积矿床有关，因此矿物淋滤似乎是砷污染的来源。已发现坎克区较高的砷和锰含量对动植物产生了影响。本文还介绍了一例偶发性砷性腹泻的案例研究。
