Effect of Tricyclazole on the Growth and Metabolism of Zea mays

摘要

Heavy metals in water have severe toxicity towards aquatic life and human beings. In north-eastern region ofIndia, increasing rate of heavy metal content in drinking water has become a matter of serious concern as ithas adverse health affects at high concentration. Many researchers have already studied high concentrationof arsenic and heavy metals in different districts in this region. In Lakhimpur district of Assam in India, nodetailed study about arsenic and heavy metals in drinking water has been done till now. In order to assessthe concentration of heavy metals in drinking water of Lakhimpur district of Assam, twenty locations wereselected for the study. The analysis was carried out for three years from June 2005 to May 2008 coveringfour seasons in a year. Metals studied in the present investigation were Zn, Pb, Ni, Cu and As. From theanalytical data, it was found that Cu and Zn concentration was within ISI permissible limit. The all seasonaverage values of Ni in all the sampling points were found within 0.1mg/L. Pb concentration was found to beat a higher level in almost all the sources. In 5% samples As content exceeded ISI limit of 0.05mg/L. Seasonalvariations were also observed and high values were detected in monsoon season. Health survey in thedistrict were also done with the help of a pre-prepared questionnaire and the over all health status was foundto be not satisfactory. Most of the people in the district suffered from mild to severe gastrointestinal diseases.Though, arsenic concentration was high in a few locations, no case of arsenocosis has been reported tilldate.