Water-soluble characteristics of chlorine in char derived from municipal solid wastes
Water-soluble characteristics of chlorine in char derived from municipal solid wastes
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DOI：
10.1016/j.wasman.2005.04.012
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发表时间：
2006-01-01
期刊：
影响因子：
8.1
通讯作者：
Tanaka, N.
中科院分区：
文献类型：
--
作者：
Hwang, I. H.;Matsuto, T.;Tanaka, N.
对城市生活垃圾焦炭中的氯进行了表征，并根据其水溶性对其进行了定量：易溶、难溶和非水溶氯。为此，进行了水洗、加热或碳化的四个循环过程。为了确定不溶于水的氯的性质，对洗后的焦炭进行了额外的热处理和碱酸洗涤工艺。研究发现，较大的焦炭颗粒(0.5-1.0 mm)对非水溶氯量有显著贡献。通过粉碎和硝酸-氢氟酸消解，确定了影响大颗粒焦炭氯释放的因素。粉碎对非水溶氯的释放是无效的，而大约32%的非水溶氯是通过硝酸-氢氟酸消化来提取的。因此，非水溶氯的存在很可能源于其化学性质，而不仅仅是其物理性质。(C)2005爱思唯尔有限公司。保留所有权利。
Chlorine in char derived from municipal solid waste (MSW) was characterized and quantified based on its water solubility: easily water-soluble, hardly water-soluble, and non-water-soluble chlorine. For that, a four-cycle process of water-washing, heating or carbonation were carried out. In order to confirm the characteristics of non-water-soluble chlorine, additional thermal treatment and an alkali-acid washing process were applied to washed char. It was found that a large particle size of char (0.5-1.0 mm) significantly contributed to the amount of non-water-soluble chlorine. Pulverization and HNO3-HF digestion were performed to identify a factor to interfere chlorine release from char with a large particle size. Pulverization was proven ineffective for release of non-water-soluble chlorine, whereas approximately 32% of non-water-soluble chlorine was extracted by HNO3-HF digestion. Therefore, the presence of non-water-soluble chlorine is likely to originate from its chemical property rather than simply from its physical one. (c) 2005 Elsevier Ltd. All rights reserved.