%0 Journal Article
%T Distribution of dichlorodiphenyltrichloroethane and hexachlorocyclohexane in urban soils and risk assessment
%A Bhupander Kumar
%A Meenu Mishra
%A Virendra Kumar Verma
%A Sanjay Kumar
%J Journal of Xenobiotics
%D 2013
%I PAGEPress Publications
%R 10.4081/xeno.2013.e1
%X This study deals with the distribution of dichlorodiphenyltrichloroethanes (DDTs) and hexachlorocyclohexanes (HCHs) in urban soils, their possible sources and probabilistic human and environmental health risk. The average concentrations of total HCHs and total DDTs in the soils were in the range of 0.56-8.52 mg kg每1 and 0.54-37.42 mg kg每1, respectively, which were lower than guideline limits. The compositional analysis of HCH isomers reflects contaminations from recent usage. However, isomeric ratios between DDT, DDE and DDD, indicate anaerobic degradation of DDT and contaminations from aged DDT. Human and environmental health risk assessment was carried out by the estimation of lifetime average daily dose (LADD), incremental life time cancer risk (ILCR) and non carcinogenic health hazard quotient (HQ). LADD of total pesticides (HCH and DDT) for human adults and children was ranged between 3.3x10每9-6.6x10每8 mg kg每1d每1 and 1.7x10每8-3.4x10每7 mg kg每1 d每1, respectively. The cumulative ILCR for adults and children was ranged from 5.1x10每9 to 4.6x10每8 and 2.6x10每8 to 2.4x10每7, respectively. The HQ was ranged between 1.8x10每6- 1.4x10每4 and 9.5x10每6-7.2x10每4, respectively for adults and children. These estimated ILCR and HQ were within the safe acceptable limits, indicating negligible risk to the residents of the study area.
%K urban soils
%K health risk assessment
%K dichlorodiphenyltrichloroethane (DDT)
%K hexachlorocyclohexane (HCH).
%U http://www.pagepressjournals.org/index.php/xeno/article/view/628