As, Cr, F contamination of ground water in India and Remediation by low cost Adsorbents;

Large scale  industrial  growth in  India  has  caused  serious  concern  regarding  the  susceptibility  of   ground  water contamination  due  to  heavy  metals .  Waste materials  near the  factories  which  is  subjected  to  reaction   to   percolating  rain  water and  reaches  the  ground water  level  . This   percolating  water   picks  up a large  number   of   heavy  metals  and   reaches  the   aquifer  system  and  degrades   the   ground   water  quality  The  most  important  factor which distinguishes metals from other pollutants is that  they are not  biodegradable once they  enter  the environment .These  metals Al(III), Cr(VI),Fe(III), Ni(II), Mn(II),Mg(II),have cumulative effects  at low levels when present in drinking water and  ground water .The adsorbtion of these  metals in the body system is  high  and   excretion is  slow . Studies on the relationship between the carcinogenicity of a metal and its ability to decrease the fidelity of RNA synthesis with DNA polymerase.The genetic toxicity of metals have shown levels of some metals [ in blood serum , plasma nucleic acid and tissues] increase with tumour initiation and development .

Green  Chem 2010  National Seminar on Introduction to Green chemistry education Theory and Practice