Remediation Effect of Aluminum Containing Compound Soil Conditioners on Cadmium and Plumbum Contaminated Soil and Vegetables

Some kinds of compound soil conditioners were made from zero-valent aluminium, sulfur and calcium hydroxide according to a certain weight proportion of those materials. And a soil-pot trial was conducted to test effects of using them on vegetable yield, contents of cadmium and plumbum in vegetable, and the available contents in soils. Results indicate that, on the basis of “Pollution soil + chemical fertilizer” (i.e., treatment of “PS+CF”), it would increase vegetable’s yield, and decrease the contents of cadmium and plumbum of vegetable, enhance soil’s pH, but reduce the available contents of Cd and Pb in soils to a certain extent by using those soil conditioners (i.e., treatment of “PS+CF+Al1”, “PS+CF+Al2”, “PS+CF+Al3” and “PS+CF+Al4”).Among them, the effects of treatment “PS+CF+Al4” were relatively the best, and has a good application prospect in the field of soils, which were suffered from the contaminated by heavy metals Cd or Pb.