Effect of LMWOAs on Maize Remediation of Cadmium and Plumbum Pollution in Farmland

Plant extraction is a thorough remediation method to remove heavy metals from soil. Chelating agents can enhance the effect of soil by plants. In this study, low molecular weight organic acids (LMWOAs), such as citric acid (CA), tartaric (TA) and polyaspartate (PASP), were added farmland contaminated with Cd Pb combined corn absorption Cadmium (Cd) Plumbum (Pb). The effects LMWOAs on growth yield maize, concentrations in each part rhizosphere pH, total cadmium lead content DTPA-Cd studied. enrichment, transport ability maize analyzed, calcium chloride (CaCl2) was compared. results showed that: (1) Exogenous increased biomass compared no material (CK), CA 6.33%. (2) promoted uptake all parts distribution organs follows: straws > roots cobs kernels kernels. line GB 13078-2017 China, which could be used feed maize. (3) enhanced enrichment roots. PASP had good Pb. CaCl2 capacity straw. (4) Compared CK, amount decreased 6.93–26.99% 2.74–6.79%, respectively. promote concentration soil, most significant increase pH value 0.03–0.14 units. removal has comprehensive effect.