Heavy Metals Transfer from Soil to Grass Types in Tannery Sludge Compost Amended Soil

The Cr, Cu, Zn, and Ni accumulations in three different grass types were investigated with doses of 0% (control), 5%, 10%, 25%, and 50% tannery sludge compost (TSC) application to soil. The pot experiments showed that 5% and 10% TSC amendment enhanced the grass seed mixture (GSM) and Ecopalmix species while 50% TSC disrupted the plant growth. The TSC addition considerably increased the Cr concentrations in plants depending on the extreme Cr level in the TSC. The order of metals mobility according to the transfer coefficient (T-c) values was found as Zn > Cu > Cr > Ni