铁粉-Fenton氧化处理络合铜镍废水的研究
关键字: Fenton；铁粉；电镀废水Title Study on treatment of electroplating wastewater containing copper ions , nickel ions , complexing agents by iron powder assisted Fenton process。
Abstract
Electricplating wastewater typically contains organics and metal ions. The study explored the feasibility of a sequential procedure (the combination of the Fenton method and the Hydroxide precipitation ), for treating electric plating wastewater, and established the optimum parameters for it. The effects of initial pH、H2O2 initial Concentration、Fe、reaction time、reaction temperature、pH of Hydroxide precipitation、Precipitants were investigated. Conclusions show that at pH=3,[H2O2]=3.33g/L, Fe=15g/L,T=25℃，t=90min, pH of Hydroxide precipitation was 10,the optimistic conditions are determined 69.51% of COD、99.28% of Cu2+、99.27% of Ni2+ removal were achieved. At the same condition, when the Ca(OH)2 was used as the Precipitant, 69.51% of COD、99.28% of Cu2+、99.27% of Ni2+ removal were achieved. So the efficiency of Ca(OH)2 was better than NaOH. This treatment was in preparation for the next biochemical processing to make the emission of the wastewater reach the national discharge standard.
Key words: Fenton ;iron powder; electric plating wastewater
目次
1 绪论 1
1.1 水资源 1
1.1.1 我国水资源及污染现状 1
1.1.2 水体中的重金属污染 1
1.1.3 铜镍废水的来源及危害 2
1.2 国内外对铜镍废水的处理方法 3
1.3 Fenton反应的发展概况 3
1.4 Fenton反应的机理 5
1.5 影响Fenton反应的因素 6
1.5.1 Fe2+浓度的影响 7
1.5.2 H2O2浓度的影响 8
1.5.3 pH的影响 9
1.5.4 反应温度的影响 10
1.5.5 反应时间的影响 11
2 铁粉-Fenton氧化处理络合铜镍废水 12
2.1 实验部分 12
2.1.1 实验试剂和仪器 12
2.2 实验方法 13
2.3 分析方法 14
2.4 实验结果与讨论 14
2.4.1 反应初始pH值对去除率的影响 14
2.4.2 H2O2投加量对去除率的影响 16
2.4.3 Fe投加量对去除率的影响 17
2.4.4 反应时间对COD去除率的影响 19
2.4.5 反应温度对去除率的影响 20
2.4.6 沉淀pH对去除率的影响 22
结论 24
参考文献 26
1 绪论
1.1 水资源
水是人类最宝贵的自然资源。谁是地球的血液，是人类生存的命脉。然而，水绝非取之不尽、用之不竭，它是一种不可替代的有限自然资源。对水资源滥采滥用以及无节制的排放污水废水将会危机人类自身的生存。人类必须自省自律，应该探讨水循环的合理发展途径，对保护人类的生存环境以及文持人类社会可持续发展的问题加以重视，水污染防治与水资源利用必须有机地结合起来。