期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2015
卷号：4
期号：9
页码：5-9
语种：English
出版社：International Science Community Association
摘要：Safe discharge of untreated waste water and scarcity of water is still a burning problem in front of mankind. Discharge of untreated waste water, without any treatment affects the physico chemical properties of water and soil which enters into food chain and affects agriculture products, animal and human health. This paper reveals that use of treated waste water instead of untreated waste water improves the physico chemical properties of water i.e. pH, EC, TDS, Chloride, Hardness, DO, BOD, COD, Nitrate, Phosphate and Sulphate changes from 8.49 to 7.20, 1.71 to 3.-82mmhos/cm, 2253 to 734 mg/l, 776.70 to 564.33 mg/l, 1100 to 330 mg/l, 0.5 to 6.9mg/l, 300 to 60mg/l, 800 to 144 mg/l, 13 to 17mg/l, 6.89 to 9.12 mg/l and 28 to 37 mg/l respectively. In soil physico chemical properties i.e. pH, EC, Chloride, Organic Matter %, Organic Carbon %, Nitrogen % and Phosphorus % changes from 9.4 to 7.5, 1.25 to 1.10 mmhos/cm, 16.7 to 19.3 mg/l, 0.65 to 2.55%, 0.37 to 1.47% and 0.018 to 0.022 % and 0.016 to 0.013%. Heavy metal contents i.e. Zn, Cu, Cr, Cd, Ni ,Pb and Fe in water samples change from 3.568 to 3.494 mg/l, 2.814 to 2.616 mg/l, 1.623 to 1.235 mg/l, 1.930 to 1.562 mg/l, 0.051 to 0.028 mg/l, 1.084 to 1.047 mg/l and 1.449 to 1.362 mg/l respectively. In soil samples, heavy metal contents i.e. Zn, Cu, Cr, Cd, Ni, Pb and Fe changes from 1.690 to 1.245 mg/kg, 1.100 to 1.080 mg/kg, 0.138 to 0.590 mg/kg, 0.243 to 0.144 mg/kg, 0.041 to 0.025 mg/kg, 0.311 to 0.282 mg/kg and 1.831 to 0.818 mg/kg respectively After using treated waste water physico chemical properties of water and soil improve but there is a minor change in heavy metal content. So, treated waste water (after secondary treatment) can be used as a best source of irrigation water which fulfill the nutrient requirements of crops. But, it is advisable that we should move towards tertiary waste water treatment techniques so that we can also reduce the heavy metal content up to a greater extent, combat the problem of waste water pollution, reduce the stress on limited fresh water available today and can use waste water for various domestic purposes.
关键词：Treated waste water;untreated waste water;secondary treatment;heavy metal;nutritional value
