| 中温焙烧/钠化氧化法回收电镀污泥中的铬 |
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| 引用本文： | 郭茂新,沈晓明,楼菊青.中温焙烧/钠化氧化法回收电镀污泥中的铬[J].环境污染与防治,2009,31(4). |
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| 作者姓名： | 郭茂新 沈晓明 楼菊青 |
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| 作者单位： | 浙江工商大学环境科学与工程学院,浙江,杭州,310012 |
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| 基金项目： | 浙江省重点科技计划项目 |
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| 摘 要： | 采用中温焙烧/钠化氧化法从电镀污泥中回收铬.结果表明,影响铬浸出率的最主要因素为焙烧温度.电镀污泥与碳酸钠质量比、焙烧时间、水浸时间对铬浸出率的影响较接近,在水浸水固比为10.0 ; 1.0(质量比)、室温、焙烧温度为650℃、焙烧时间为2.0h、电镀污泥与碳酸钠质量比为1:1、水浸时间为60 min的最佳浸出条件下,铬浸出率为99.3%;去除氢氧化铝、氢氧化锌的最佳反应温度和pH分别为90～95℃和7.5;去除硫酸钠晶体的最佳pH为4.0,在最佳试验条件下,铬回收率为90.57%.
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| 关 键 词： | 中温焙烧/钠化氧化法 电镀污泥铬 回收 |
Research on the extraction process of chromium from electroplating sludge by intermediate temperature roasting-sodium oxidization method |
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| Guo Maoxin,Shen Xiaoming,Lou Juqing.Research on the extraction process of chromium from electroplating sludge by intermediate temperature roasting-sodium oxidization method[J].Environmental Pollution & Control,2009,31(4). |
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| Authors: | Guo Maoxin Shen Xiaoming Lou Juqing |
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| Institution: | Department of Environmental Engineering;Zhejiang Gongshang University;Hangzhou Zhejiang 310012 |
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| Abstract: | Chromium was reclaimed from electroplating sludge using intermediate temperature roasting-sodium oxidization method. Single factor experiments were conducted on the major factors influencing the extraction efficiency of chromium,which was at roasting temperature. The ratio of the sludge and sodium carbonate,the roasting time,and extraction time also affected the reclamation of chromium. Through the orthogonal experiments we found that the rate of chromium recovery reached 99.3% when the optimum process cond... |
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| Keywords: | intermediate temperature roasting-sodium oxidization method electroplating sludge extraction of chromium |
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