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以模拟遭受突发性镍污染的水体为研究对象,考察了化学沉淀法强化常规水处理工艺对镍污染原水的应急处理效果。结果表明,该方法能有效去除饮用水水源中的镍,可作为突发性饮用水水源镍污染的应急处理措施;pH对除镍效果有较大影响,故在水厂现有常规工艺基础上,通过调整混凝前原水的pH值,保证滤后水的pH值在9.0以上,即可使出厂水水质满足《生活饮用水卫生标准》(GB 5749—2006)要求;聚合氯化铝在高pH值条件下存在铝超标风险,故化学沉淀法除镍时宜选用三氯化铁作为混凝剂。
In order to simulate the water subjected to sudden nickel pollution, the effect of chemical precipitation on strengthening the emergency treatment of nickel-contaminated raw water by conventional water treatment was investigated. The results show that this method can effectively remove nickel from the drinking water source and can be used as an emergency measure to deal with the nickel pollution of sudden drinking water source. The pH has a great influence on the removal of nickel. Therefore, based on the existing conventional technology , By adjusting the pH value of the raw water before coagulation, to ensure that the filtered water pH value of 9.0 or more, you can make the water quality of the factory to meet the “drinking water health standards” (GB 5749-2006) requirements; PAC in the high Under the conditions of pH there is excessive risk of aluminum, so chemical precipitation should be used in addition to ferric chloride as ferric chloride coagulant.