Sabhapandit Pranab, Mishra Abani K
Deptt. of Chemistry, Chaiduar College, Gohpur, Sonitpur, Assam, India.
J Environ Sci Eng. 2011 Jan;53(1):89-96.
According to WHO, about 80% of all the diseases of human beings are caused by water. Since these diseases are directly related with human health, it is necessary to bring awareness among the present and future generation about the consequences of water pollution. Therefore, in this study 34 samples from different sources such as dug wells, bore wells, hand pumps and ponds, where no information is available, were collected during 2008.The samples were analyzed for different physico-chemical parameters like chloride, sulphate, nitrate, sodium, potassium, calcium, magnesium, iron, copper, cadmium, chromium, lead and zinc using standard methods. The result indicated that chloride and nitrate concentrations in all the sources were within the permissible limit, but ponds contained high amount. The concentrations of sulphate, sodium and zinc in dug wells and bore wells were very high and the concentrations of calcium and chromium were within the permissible limit. In case of lead and calcium their concentrations in ponds were higher than the other sources but chromium was not detected in ponds and hand pumps. The iron and copper concentrations in all the sources exceeded the WHO value, particularly dug wells and bore wells contained high concentrations. Magnesium content was greater than potassium and less than sodium in dug wells and bore wells, but in ponds its concentration was greater than the other sources. In our investigation the results indicate that TDS, EC, pH, BOD, DO, COD, TSS were found very high. In 76% samples turbidity exceeded WHO guideline value 5NTU. It was found that 97% and 76% of the sources were positive for TC and FC. Overall analysis revealed that 11 samples were fit for drinking purpose with respect to the parameters studied.
据世界卫生组织称，人类所有疾病中约80%是由水引起的。由于这些疾病与人类健康直接相关，有必要让当代和后代认识到水污染的后果。因此，在本研究中，于2008年采集了34份来自不同水源（如旱井、管井、手压泵和池塘）的样本，这些水源此前并无相关信息。使用标准方法对样本的不同理化参数进行了分析，包括氯化物、硫酸盐、硝酸盐、钠、钾、钙、镁、铁、铜、镉、铬、铅和锌。结果表明，所有水源中的氯化物和硝酸盐浓度均在允许范围内，但池塘中的含量较高。旱井和管井中的硫酸盐、钠和锌浓度非常高，而钙和铬的浓度在允许范围内。就铅和钙而言，它们在池塘中的浓度高于其他水源，但在池塘和手压泵中未检测到铬。所有水源中的铁和铜浓度均超过了世界卫生组织的标准值，特别是旱井和管井中的浓度很高。旱井和管井中的镁含量大于钾且小于钠，但在池塘中其浓度高于其他水源。在我们的调查中，结果表明总溶解固体（TDS）、电导率（EC）、pH值、生化需氧量（BOD）、溶解氧（DO）、化学需氧量（COD）、总悬浮物（TSS）都非常高。在76%的样本中，浊度超过了世界卫生组织的指导值5NTU。发现97%和76%的水源中总大肠菌群（TC）和粪大肠菌群（FC）呈阳性。总体分析表明，就所研究的参数而言，有11个样本适合饮用。
