M. HOODAJI, M. NEDAEI NIA, S.A.A. MOOSAVI

The Effect of Compost on Release and Transport of Heavy Metals (Zn, Cu) in Soil

Abstract. The present study is aimed to examine the effect of consuming compost on transportation of copper and zinc in soil. There were four compost treatments and heavy metals (zinc and copper) and two control treatments (one compost soil and other compost-free soil) as a completely random design. The runoff every time was taken and determined the concentrations of copper and zinc, EC and pH. The results show that the concentration of zinc and copper during 12 times of leaching showed significant difference at %1. The treatment No.4 has the maximum Zn concentration in output runoff (3.3 mg/lit) having the highest added zinc in compare with the other treatments. The control treatment No.2 had the maximum copper concentration (0.1 mg/lit). The treatment No.1 had the minimum copper concentration, and despite the added copper (290 mg/lit) to the mixture of soil and compost, little copper transported in soil. Also pH and EC have significant difference (%1) during 12 times of leaching.

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