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随着工业的不断发展,重金属废水、废渣、污泥等排于环境,污染水源,使水体重金属含量不断增加,对人类产生的危害日益严重。目前尽管有许多重金属处理方法,但用羟基氯化铝和明矾作为混凝剂来混凝沉淀去除水中重金属的报道为数还不多。因此,为了研究和解决水中重金属的有效、实用的处理技术,我们采用羟基氯化铝和明矾作为混凝剂,进行混凝沉淀去除水中六价铬、砷、汞的试验研究。首先在室温17℃、水温13℃,水pH7的条件下,选择出最佳混凝剂浓度。结果以每
With the continuous development of industry, heavy metal waste water, waste residue, sludge and the like are discharged from the environment and pollute the water source, causing the heavy metal content of the water body to continuously increase and the harm to human beings has become increasingly serious. At present, although there are many heavy metal treatment methods, there are only a few reports on coagulation and sedimentation of heavy metals in water using hydroxy-aluminum chloride and alum as coagulants. Therefore, in order to study and solve the effective and practical treatment technology of heavy metals in water, we use aluminum hydroxychloride and alum as coagulant to carry out coagulation and sedimentation to remove hexavalent chromium, arsenic and mercury in water. First, at room temperature 17 ℃, water temperature 13 ℃, water pH7 conditions, choose the best coagulant concentration. The result is per