Effects of Natural Organic Acids on Growth of Maize and Uptake of Chromium by Maize in Chromium Contaminated Soil
Seven natural organic acids were added to moderate artiﬁcial Cr-contaminated soil to investigate the effects of natural organic acids on growth of maize and phytoextraction of chromium by maize. The results showed that most organic acids promoted the height growth of maize except for humic acid in Cr-contaminated soil. The total dry weight increased only with oxalic acid treatment. The natural organic acids can change the dry matter distribution of the shoot and the root. The total uptake of chromium by the shoots of maize showed the highest with citric acid treatment (p<0.01), followed by succinic acid, tartaric acid and malic acid treatment, indicate that citric acid has the potential to be used for phytoremediation of Cr-contaminated soil.
Zhenyu Du and Chengbin Li
G. L. Cheng et al., "Effects of Natural Organic Acids on Growth of Maize and Uptake of Chromium by Maize in Chromium Contaminated Soil", Advanced Materials Research, Vol. 281, pp. 21-24, 2011