Pre and post treatment toxicity of chrome plating industry effluent to Poecilia reticulata Peter 1859

Abstract

Chromium is one of environmental pollutant that produces high toxicity even at very low concentrations. Domestic and industrial discharges are probably the two most important sources for chromium in the water environment. The toxic heavy metals are entering the food chain through drinking water, agriculture and fisheries activities and therefore endangering human life. The general objective of this study is to investigate the physico-chemical parameter of Chrome Plating Industrial Effluent and to assess the toxicity of pre and post treated Chrome Plating Industrial Effluent to Poecilia reticulata Peter 1859. The 96 hr LC50 of untreated chrome plating industry effluent is 2.24 and treated effluent with Wolffia Columbiana Karst is 18.07 ml/l. Metal accumulation in duckweed, W. columbiana growing in these chromium contaminated sites were also determined. Therefore, duckweed may be used as a bioassay for bio monitoring and control of Cr pollution in the environment.