化学沉淀法对金属铍的去除性能试验研究

Removal of beryllium from water by chemical precipitation

研究了化学沉淀法对水中铍的去除效果及最大应对能力。结果表明,投加5 mg/L三氯化铁或聚合硫酸铁,调节原水pH≥7.5,或投加5 mg/L聚合氯化铝或硫酸铝,调节原水pH≥7.0,均可将原水中0.01 mg/L左右的铍降低至《生活饮用水卫生标准》限值(0.002 mg/L)以内。投加5 mg/L铁盐或硫酸铝可有效应对原水质量浓度为10倍标准限值的铍,当原水铍质量浓度超过标准限值的10倍时,可采用5 mg/L聚合氯化铝应对。

The efficiency of chemical precipitation on the removal of beryllium from water and the maximum response ability were investigated. The results indicated that 0.01 mg/L beryllium in raw water could be effectively decreased to lower than the limited value of the Standards for Drinking Water Quality （0. 002 mg/L）with dosing of ferric chloride or polyferrie sulfate at 5 mg/L, and regulating pH ≥7.5, or dosing polyaluminum chloride or aluminum sulfate at 5 mg/L and regulating pH ≥ 7.0. Ferric salt or aluminum sulfate at the dosage of 5 mg/L could effectively treat raw water if the concentration of beryllium is 10 times mass of the limited value. Polyaluminum chloride at the dosage of 5 mg/L could be used to treat the raw water with a concentration of beryllium exceeding 10 times mass of the limited value.