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Chemical methods and phytoremediation of soil contaminated with heavy metals. Chemosphere 41, 229-234.
| Chen H.M., Zheng, C. R., Tu, C., Shen, Z. G. (2000).
| The effects of chemical amendments (calcium carbonate (CC), steel sludge (SS) and furnace slag (FS)) on the growth and uptake of cadmium (Cd) by wetland rice, Chinese cabbage and wheat grown in a red soil contaminated with Cd were investigated using a pot experiment. The phytoremediation of heavy metal contaminated soil with vetiver grass was also studied in a field plot experiment. Results showed that treatments with CC, SS and FS decreased Cd uptake by wetland rice, Chinese cabbage and wheat by 23-95% compared with the unamended control. Among the three amendments, FS was the most efficient at suppressing Cd uptake by the plants, probably due to its higher content of available silicon (Si). The concentrations of zinc (Zn), lead (Pb) and Cd in the shoots of vetiver grass were 42-67%, 500-1200% and 120-260% higher in contaminated plots than in control, respectively. Cadmium accumulation by vetiver shoots was 218 g Cd/ha at a soil Cd concentration of 0.33 mg Cd/kg. It is suggested that heavy metal-contaminated soil could be remediated with a combination of chemical treatments and plants.
The effects of chemical amendments on the growth and uptake of cadmium by wetland rice, Chinese cabbage and wheat grown in a red soil contaminated with Cadmium were investigated using a pot experiment. The phytoremediation with vetiver grass was studied in a field experiment. Treatments with calcium carbonate, steel sludge and furnace slag decreased uptake by plants by 23-95% compared with the untreated control, with furnace slag being most effective at suppressing Cd uptake. Cadmium uptake by vetiver grass was 218g Cd/ha soil at a soil concentration of 0.33 mg Cd/kg. It is suggested that heavy metal-contaminated soil could be remediated with a combination of chemical treatments and plants.
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