The Bioscan, 1(1-4) 027-030,2006
An International Quarterly Journal of Life Sciences
web site: www.thebioscan.in 
COMPARISON OF TOXICOKINTICS BASED BIOACCUMULATION OF COPPER AND
CADMIUM BY EARTHWORM LAMPTITO MAURITHI (KINBERG) UNDER
CONTROLLED LABORATORY CONDITION
P.N. SUDHA & D. MANLEY BACKYAVATHY
P.G. and Research Department of Zoology, Voorhees College, Vellore - 632 001.
*Department of Chemistry, DKM College for Women, Vellore
Email: backya_2000@yahoo.com
KEY WORDS

Copper
Cadmium
Toxicokinetics
Lampito maurutii

Received on: 10.10.2006

Accepted on: 11.12.2006



*Corresponding
 Author
ABSTRACT

Intevertebrates particularly earthworms are being used extensively in laboratory test of evaluating the toxicity of chemicals. Earthworms are also known to accumulate large concentration of metals into their tissues when exposed to contaminated soil. Bioavailability of metals to organism is strongly site specific and is controlled by the species of the metral, the organism are exposed and the ability of the organisms to reduce or eliminate metal and effect to vulnerable tissues by sequestration etc. Thus uptake of the metal by earthworms is not simply a case of bioavailability of the metal but also depends on the biokinetics of uptake, storage and excretion. The rate at which these process occur will determine the amount of metal in the organism at any one time and the toxicity of any contaminant. Toxicokinetics studies are of major importance in soil eco-toxicology since many effect can hardly be recognized in acute and chronic toxicity tests. Cadmium and copper are two of the toxic heavy metals. The general aim of the present study was to investigate toxicokinetic behaviour of heavy metals, copper and cadmium on earthworm Lampito mauritii. The sutdy revealed that the biokinetics process follows first order kinetic equation, But the rate of accumulation differs for the two metals