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在常规工艺的基础上,通过在混凝搅拌前投加氧化剂高锰酸钾及氯的方式去除水中铊。通过影响水中铊去除率的单因素试验,找出处理铊浓度为0.3μg/L的原水所需的合理的氧化剂的量为:高锰酸钾0.5~0.7 mg/L,次氯酸钠3~4 mg/L(以有效氯计),此时,铊去除率可达70%。调整试验水的pH为9.0~9.5,同时采用聚合硫酸铁作为絮凝剂,铊去除率可达80%。氧化剂及混凝剂的投加量应根据原水水质具体情况进行调整,但不得出现二次污染。
Based on the conventional process, the thallium in the water is removed by adding oxidant potassium permanganate and chlorine before the coagulation and stirring. Through the single-factor experiments that affect the removal rate of thallium in water, the reasonable amount of oxidant needed to treat raw water with thallium concentration of 0.3 μg / L was found to be 0.5-0.7 mg / L potassium permanganate, 3-4 mg / L (effective chlorine), this time, thallium removal rate of up to 70%. Adjusting the pH of the test water to 9.0-9.5, while using polymeric ferric sulfate as flocculant, thallium removal rate of up to 80%. Oxidants and coagulant dosage should be adjusted according to the specific circumstances of the raw water quality, but may not appear secondary pollution.