Contamination of soil and plants with potentially toxic elements irrigated with mixed industrial effluent and its impact on the environment.

Abstract

For productive utilisation of effluent–contaminated agricultural land, mobilisation and statistical analysis of potentially toxic elements in soil and plants of fields irrigated with mixedindustrial effluent have been undertaken. Total Fe,Mn, Zn, Cu, Pb, Ni and Cr have been estimated in soiland plant species of contaminated and noncontaminatedsites. 18 plants species and 18 root adjacent soilsamples from contaminated Kalipur area and 11 plantsspecies and 11 root adjacent soil samples fromuncontaminated Madhabpur area comprising majorcrops, vegetables and weeds have been included in thestudy. It is revealed that Hibiscusesculentus, Lycopersicon esculentum and Luffa acutangula growing in effluent–contaminated field show mobilisation ratio 0.5 and simultaneously exhibithealthy gigantic morphology at the early floweringstage. Coriandrum sativum, Raphhanussativus, Solanum melongena, Spinaceaoleracea, Oryza sativum, Brassica oleraceashowed mobilization ratio >0.5 butmaintained normal growth. Based on mobilization ratioand external morphology, we suggest the cultivation ofplants H. esculentus, L. acutangula, L. esculentum in land irrigated with industrial effluent. The highest andsecond highest enrichment factor (EFpp)was found for Cd and Pb, respectively. Pearson'scorrelation coefficient indicated that the metal levelin soil is not the main factor governing metaluptake. This study will help in selecting plantspecies for cultivation in contaminated fields.