期刊
WASTE MANAGEMENT
卷 28, 期 12, 页码 2653-2666出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2008.01.008
关键词
-
资金
- Spanish Ministry of the Environment [2.5-206/2005/2]
- Diputacion Foral de Bizkaia (EKINBERRI). INASMET, ACERALIA
- Iurreta Corporation S.A.
Mixtures of wastes were prepared to improve on the characteristics of the individual ingredients as Technosols, with special attention given to heavy metal extractability. An anaerobic digested sewage sludge and a CaO-treated aerobic sludge were used. A mixture of the two sludges (50:50 DW basis) was also prepared to provide a third type of sludge. The residues were mixed with other types of waste, such as fly ash, Linz-Donowitz slag, foundry sand, shot blasting machine scrap, fettling and barley straw. Extractability of Cu, Cr, Ni, and Zn by 0.01 M CaCl2 extraction (Me-CaCl2) was carried out, and leachability of these elements was estimated by acidification of an aqueous Suspension of the mixtures with 0.5 N acetic acid (Me-acetic). The total concentrations of the metals were also determined (Me-T). The Me-CaCl2/Me-T ratios for Cu and Ni (means: 4.0% and 3.1%) were higher than those for Cr and Zn (means: 0.07% each). The mean Me-acetic/Me-T ratios followed the order Ni, Zn, Cu, and Cr (19.5K, 4.1%, 3.7%, and 0.09%, respectively). The results highlight the existence of complex interactions among organic matter solubility, pH and heavy metal extractability. (c) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据