pH对电解处理垃圾渗滤液的影响
Effect of pH value on electrolytic treatment of landfill leachate
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摘要: 在不同的pH值条件下对氯离子和重金属离子含量不同的渗滤液和邻硝基苯酚人工模拟废水进行了电解处理，着重考察了不同pH值条件下氯离子浓度和重金属离子种类对有机物电解去除效果的影响。结果表明，电解处理过程中， pH值对有机物电解去除效果的影响与渗滤液的水质有关，尤其与渗滤液中氯离子和重金属离子浓度以及重金属离子种类有关。在pH＝2的条件下电解处理氯离子和重金属离子含量均很低的渗滤液，有利于有机物的氧化去除；在pH=9的条件下电解处理氯离子和重金属离子浓度均较高的渗滤液，其COD的电解去除效果最好；在pH=2或pH=12的条件下电解处理氯离子浓度高而重金属离子浓度低的渗滤液，能促进有机物的氧化分解。在一定浓度范围内，渗滤液中无机变价离子的组成不同，电解处理垃圾渗滤液的最佳pH值也不同。Abstract: The landfill leachate and the onitrophenol artificial wastewater with different amounts of chloride ion and heavy metal ion was treated by electrolysis at different pH values. The influence of chloride ion concentqtion and heavy metal ion variety on the removal result of organic matters during the electrolytic treatment was mainly disscussed. It was indicated that the influence of pH value on the treatment result was correlated with the concentrations of chloride ion and heavy metal ion and the variety of heavy metal ion.When the wastwater with low concentration of chloride and low-concentration of metal ions was treated,the pH ＝2 of the liquor was favorable for the removal of organic matters.When the wastwater with high concentration of chloride and high concentration of metal ions was treated,the pH=9 of the liquor was most preferable for the removal of COD. When the wastwater with high concentration of chloride and low concentration of metal ions was treated, pH=5 and pH=12 could promote the oxidation of organic matters.In the some concentration rang,if the composition of inorganic variable valence ion in leachate was different,the most preferable pH value condition was different when the leachate was treated by electrolysis.
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Key words:
- pH /
- landfill leachate /
- o-nitrophenol /
- electrolysis /
- organic matter
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