Biokinetic modeling of heavy metals in earthworms |
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Authors: | Vishal Sharma Ramakant Sharma Shanta Satyanarayan |
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Institution: | 1. Sevadal Mahila Mahavidyalaya and Research Academy , Sakkardara, Nagpur 440009 , Maharashtra , India viskikha_2007@yahoo.com;3. NEERI , Nagpur 440020 , Maharashtra , India |
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Abstract: | Studies concerning bioaccumulation kinetics and bioconcentration factor (BCF) of heavy metals like zinc (Zn), lead (Pb), chromium (Cr), cadmium (Cd), and copper (Cu) in earthworm Eudrilus eugeniae tissues including integument, gizzard, clitellum, and head region were undertaken. Calculated BCF, predicted K ow, and predicted K oc showed a significant correlation between heavy metals in different earthworm tissues, in substrate spiked with heavy metals. The regression coefficient (r 2) between heavy metal uptake concentration and exposure time varied between 0.73 and 0.99, indicating significant correlation. The K oc was a maximum of 13.9016 in case of Cu and integument at an exposure time of 100 days and a minimum of 0.1114 in case of Cr with respect to head at the same exposure time. Earthworms accumulated heavy metals following chronic exposure to municipal solid waste containing heavy metals. BCF and uptake rate kinetics of heavy metals were calculated and showed increased values in head tissue followed by integument. |
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Keywords: | bioconcentration bioaccumulation heavy metal earthworm exposure time |
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