Mercury leaching characteristics of waste treatment residues generated from various sources in Korea.
Mercury leaching characteristics of waste treatment residues generated from various sources in Korea.
复制标题
DOI：
10.1016/j.wasman.2013.04.004
复制
发表时间：
2013-07
期刊：
影响因子：
8.1
通讯作者：
J. H. Cho;Y. Eom;J. Park;Sang-Bo Lee;Jihyung Hong;T. Lee
中科院分区：
文献类型：
--
作者：
J. H. Cho;Y. Eom;J. Park;Sang-Bo Lee;Jihyung Hong;T. Lee
本研究调查了韩国不同来源(城市、工业、医疗垃圾焚烧炉、污水污泥焚烧炉、炼油厂、燃煤电厂、钢铁制造厂、荧光灯回收器和水泥窑)产生的废物处理残渣(飞灰、底灰、污泥和磷粉)的汞(Hg)浸出特性。首先，对收集的31个残渣样品进行了汞含量分析和毒性特征浸出程序(TCLP)测试。汞含量分析表明，垃圾焚烧炉飞灰中汞含量高于其他残渣样品。然而，汞含量相近的飞灰样品的TCLP值随残渣类型的不同而变化很大。对低汞浸出率(RL)和高汞浸出率(RL)的飞灰样品进行了进一步分析，找出了影响汞浸出潜力的主要因素。低RL灰的缓冲能力高于高RL灰。汞形态分析结果表明，低RL值的飞灰主要由低溶解度的汞化合物(Hg2Cl2、Hg0或HgS)组成，而高RL值的飞灰含有20%以上的高溶解度汞化合物(HgCl2或HgSO4)。
In this study, mercury (Hg) leaching characteristics of the waste treatment residues (fly ash, bottom ash, sludge, and phosphor powder) generated from various sources (municipal, industrial, medical waste incinerators, sewage sludge incinerator, oil refinery, coal-fired power plant, steel manufacturing plant, fluorescent lamp recycler, and cement kiln) in Korea were investigated. First, both Hg content analysis and toxicity characteristic leaching procedure (TCLP) testing was conducted for 31 collected residue samples. The Hg content analysis showed that fly ash from waste incinerators contained more Hg than the other residue samples. However, the TCLP values of fly ash samples with similar Hg content varied widely based on the residue type. Fly ash samples with low and high Hg leaching ratios (RL) were further analyzed to identify the major factors that influence the Hg leaching potential. Buffering capacity of the low-RLfly ash was higher than that of the high-RLfly ash. The Hg speciation results suggest that the low-RLfly ashes consisted primarily of low-solubility Hg compounds (Hg2Cl2, Hg0or HgS), whereas the high-RLfly ashes contain more than 20% high-solubility Hg compounds (HgCl2or HgSO4).