降低渗滤液中氰化物的试验研究
Experimental Study on Reducing Cyanide in Leachate
钟琦 1张千帆 2李行德1
作者信息
- 1. 云南大地丰源环保有限公司,云南 昆明 650401;云南大地绿坤环保科技有限公司,云南 昆明 650401
- 2. 云南大地丰源环保有限公司,云南 昆明 650401
- 折叠
摘要
云南省某危险废物处理中心填埋场所产生的渗滤液总氰化物最高为 9.72 mg/L,pH值为 6.23.为了使危废中心所产生的二次废物可低成本、高效率的处理后将氰化物降低至国家污水排放标准《GB8578-1996》,对化学沉淀法进行工艺研究.结果表明,300 g 渗滤液中加入硫酸调节 pH 值为 2～3,再加入硫酸亚铁1%和聚合硫酸铁0.33%,调节pH值在5～6,加入聚合氯化铝 0.3%和少量 0.1%的聚丙烯酰胺溶液做絮凝剂,可使渗滤液中氰化物降低至国家污水排放标准《GB5978-1996》中所规定的氰化物 0.5 mg/L,氰化物去除率约为98.48%.
Abstract
The highest total cyanide in leachate from landfill site of a hazardous waste treatment center in Yunnan Province was 9.72 mg/L.The pH value is 6.23.In order to make the secondary waste generated by the hazardous waste center can be treated with low cost and high efficiency,the cyanide can be reduced to the national sewage discharge standard GB8578-1996.The process of chemical precipitation was studied.The re-sult shows that,sulfuric acid was added to300 g leachate to adjust the pH value to2-3,then add ferrous sulfate1%(wt%)and polyferric sul-fate 0.33%(wt%),to adjust the pH at 5-6,and add 0.3%(wt%)polyaluminum chloride and a small amount of 0.1%polyacrylamide solu-tion as flocculant.The cyanide in the leachate can be reduced to 0.5 mg/L of cyanide as stipulated in the national sewage discharge standard GB5978-1996.The cyanide removal rate was about 98.48%.
关键词
渗滤液/氰化物/铁盐沉淀法/氧化法Key words
Percolate/Cyanide/Iron Salt Precipitation Method/Oxidation Method引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据