强化混凝对造币废水中镍的去除研究  

Study on Removal of Nickel from Mint Wastewater by Enhanced Coagulation

作　　者：辛成[1] 谭唯[2] 王群[2] 柴彬[2] 李涛[2] 刘亚淳[2] 

机构地区：[1]四川省地质工程勘察院,四川成都610072 [2]西南交通大学地球科学与环境工程学院,四川成都610031

出　　处：《四川师范大学学报（自然科学版）》2016年第4期576-580,共5页Journal of Sichuan Normal University（Natural Science）

基　　金：国家自然科学基金(51178134)

摘　　要：为了考察不同条件下强化混凝工艺对某造币废水中镍的去除效果,采用预氧化及调节p H值的方法,得到镍去除效果的最佳条件.结果表明:采用氢氧化钠调节p H值对镍的去除效果优于用氢氧化钙调节p H值时镍的去除效果;采用氢氧化钠调节p H=9.5时,可以达到很好的去除效果,其去除率可达99.95%;芬顿试剂预氧化能力要强于次氯酸钠的预氧化能力,当p H=8.5及p H=9.5时,随着芬顿投加量的增加,镍的去除率有所增加,其最佳实验条件是p H=8.5,硫酸亚铁的投加量为78.4 mg/L,过氧化氢投加量为52.8 mg/L,镍去除率可达93.82%;以及p H=9.5时,硫酸亚铁的投加量为58.8 mg/L,过氧化氢投加量为39.6 mg/L,镍去除率可达99.95%.Preoxidation and coagulation sedimentation were used to remove the nickel of the inorganic wastewater from a mint, using calcium hydroxide and sodium hydroxide to adjust pH to select the optimal reaction condition. The results are as follows： the re- moval of nickel by using sodium hydroxide is better than that by using calcium hydroxide. The removal of nickel is the best when the pH is 9.5 by using the sodium hydroxide and the rate of removal is up to 99.95%. And the preoxidation ability of Fenton reaction is better than that of Sodium hypochlorite, when the pH is 8.5 and 9.5, respectively, The removal rate of nickel is increased with the in- creasing of Fenton＇ s quantity, and the removal rate of nickel is up to 93.82% when the pH is 8.5 with the concentration of ferrous sul- fate of 78.4 mg/L and the concentration of hydrogen preoxide of 52. 8 mg/L. Whst＇ s more, the removal rate of nickel is up to 99.95% when the pH is 9.5 with the concentration of ferrous sulfate of 58.8 mg/L, and the concentration of hydrogen preoxide of 39.6 mg/L.

关 键 词：强化混凝 预氧化 造币废水 镍 

分 类 号：X703.1[环境科学与工程—环境工程]