Effects of Inorganic and Organic Acids on Heavy Metals Leaching in Contaminated Sediment
نویسندگان
چکیده
Leaching properties of Pb, Cd, Zn, Cu at pH of 2-6 using different inorganic acids (hydrochloric acid, sulfuric acid, nitric acid) and organic acids (acetic acids, citric acid, malic acid, succinic acid) aiming at polluted sediment at downstream of a non-ferrous metal smelting enterprise is discussed. Results showed that leaching concentrations of 4 metals decreased with increasing pH. Among all the organic acids, the acetic acid showed exceptional leaching ability in a wide pH range of 2-5. Organic acids leached more heavy metals than inorganic acids did. Leaching concentration of heavy metals followed the descending order: Zn>Cd>Pb>Cu.
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