xperimental study on phytoremediation of reclaiming substrate contaminated by heavy metal

In this study, the effects on the growth of cabbage, Chinese cabbage and rape planted on fly ash plus vinasse substrate and fly ash plus sewage sludge substrate were studied and the remediation of cabbage, Chinese cabbage and rape on heavy metal Cd, Cu and Zn was discussed by calculating absorption coefficient, transmission coefficient and absorption modulus. The conclusions were that: the absorption coefficient, Transmission coefficient and absorption modulus of cabbage, Chinese cabbage and rape increased along with the time lapsed and it indicated the remediation effects of the plants in anaphase were better than that in prophase; the results showed cabbage, had effective functions in phytoremediation on heavy metal Cd, rape had some potential in phytoremediation on Cu and cabbage was better than Chinese cabbage and rape in absorption on Zn; absorption modulus was an ideal index which can estimate the ability of phytoremediation on heavy metal, because it took into account the above-ground biomass of plants and the heavy metal gross in plant root-layer.