微电解法对高浓度染料废水的脱色作用研究  

Study on decoloration of high concentration dyestuff wastewater through micro-electrolysis

作　　者：郭杰[1] 曾光明[1] 张盼月[1] 李明[1] 

机构地区：[1]湖南大学环境科学与工程系,长沙410082

出　　处：《安全与环境学报》2005年第5期102-105,共4页Journal of Safety and Environment

摘　　要：以难生化降解的甲基橙为实验染料,采用铁碳微电解法对高浓度染料废水脱色进行模拟实验.主要研究了水力停留时间(HRT)、温度和pH值对色度去除率的影响和铁碳床的再生条件.室温(20℃)条件下,最佳实验条件为:HRT=30 min,pH=5-6,铁碳床运行周期为20 h.废水温度提高有利于提高脱色效果.实验结果表明,400mg/L的甲基橙实验水样,在最佳实验条件下经过微电解法处理,色度去除率可达85%以上,CODCr去除率达到30%左右.在相同实验条件下,铁碳微电解法处理混合染料废水,色度去除率降低到64.7%.铁碳床运行失效后,用6%～8%的稀硫酸循环再生1 h,可继续使用,运行效果良好,但运行周期有所缩短.This paper intends to introduce the authors＇ study on the micro-electrolysis method to be applied to the decoloration of high concentration dyestuff wastewater with hard biodegradable methyl orange as a test dyestuff. At the same time, we have also investigated such factors as the influence of hydraulic＇, retention time （HRT）. temperature and pH value on color removal, and the regeneration conditions of iron-carbon bed. As we found, under 20℃, the optimal operation conditions were HRT=30min, pH=5-6, and the running period was 20 h. As a result, the increase of temperature helps to improve the color removing efficiency, The color removal rate of the test wastewater with 400mg/L methyl orange proves to be higher than 85% with the CODCr removal rate increasing by 30% after proper treatment by micro-electrolysis at the optimal operation conditions. Under the same conditions, when the mix-dyestuff wastewater was treated, the highest color removal rate was only 64.7% . After 1h regeneration with 6%-8% H2SO4, the disabled iron-carbon bed regained the work capacity, but the running period was made to be shortened.

关 键 词：环境工程 染料废水 微电解法 铁碳床 脱色 

分 类 号：X505[环境科学与工程—环境工程]