ABSTRACT
In the process of the ore mining, the sulfide mineral reacts with the air, water, and microbe, occurring a series of physical and chemical reactions, such as leaching, oxidation, hydrolysis, forming a low PH sulfuric acid-high iron sulfate solution, and a variety of metal ions were released, which mainly content Cu2+ (40-200 mg ⋅ L−1), Zn2+ (10-200 mg ⋅ L−1), Pb2+ (1-30 mg ⋅ L−1) and Cd2+ (0.1-10 mg ⋅ L−1) etc. The toxicity of heavy metals in wastewater not only pollute the water seriously, effect the yield and quality of crop, bur also enrich and expand in the food chain very easily, finally do harm to human health by accumulating in some organ cause chronic intoxication. Therefore, seeking a economic and practical method to eliminate the harm based on the characters of the acidic mining wastewater, guaranteeing the sustainable development of mineral resources development has received much attention from the government and the society.
