摘要
采用化学沉淀法处理含镍废水,以硫化钠为沉淀剂,将废水中的镍离子以某种含镍沉淀的形式析出,从而达到净化废水的目的,考察硫化钠的投加量、反应速率、搅拌时间和pH值对废水中镍离子的去除率的影响。结果表明,在pH=6.0,硫化钠投加质量为4.0 g,即为理论值的1.1倍时,以30 r/min的转速搅拌反应30 min的条件下,模拟含镍废水的处理效果最佳,去除率达到95.2%,所得的沉淀物经X射线衍射仪检测显示为氢氧化镍沉淀,中间过程生成的硫化氢气体可继续对废水进行处理。
Sodium sulfide was used in the precipitation treatment of nickel wastewater. The effects of chemicals dosage, reaction time and pH value on the removal rate of the nickel ions in the wastewater were investigated. The results show that the excess ratio of Na2S is 1.1, with stiring 30 min at a rate of about 30 r/min, the removal rate of nickel is 95.2%, XRD analysis showes a dense nickel hydroxide precipitate. The hydrogen sulfide produced during the process can be used to treat the wastewater.
出处
《中国粉体技术》
CSCD
北大核心
2017年第4期94-97,共4页
China Powder Science and Technology
基金
上海第二工业大学研究生项目
编号:A01GY16F030
关键词
硫化钠
含镍废水
含镍沉淀
sodium sulfide
nickel wastewater
nickel precipitation
