Preliminary study on the treatment of Japanese permutite on farmlands polluted by heavy metals

This study investigated the absorbability of Japanese permutite on water and soil polluted by heavy metals under experimental and field conditions. The results showed that, the absorbing effect of Japanese permutite on cadmium ion in water was very significant and the absorption rate was above 97% under experimental condition. Moreover, in the same case, absorbing effects of Japanese permutite on heavy metals (Pb, Cr, Cu, Cd) in soil showed no relationship with pH value, but were positively related to the input of Japanese permutite. On the other hand, under field conditions, the absorbing effects of Japanese permutite on heavy metals (Pb, Cu, Cr) in soil were also very good and the absorbance was positively related to the input of permutite. When the amount of permutite was 500 kg/667m2, the purification rates of the Japanese permutite on Pb, Cu and Cr in soil were above 95.4%, 85.3% and 57.4%, respectively.