The Neutralization Capacity and Acidification Potential of the Carbonate-Type Tailings in North Guangxi and Its Adjacent Areas,
详细信息
- 责任者：Lei Liangqi (School of Earth Science ; School of Chemical and Biologic Engineering ; Guilin University of Technology ; Guilin 541004 ; China) ; Song Ci’an
- 刊名：Journal of Mineralogy and Petrology
- 出版年：2010
- 卷期：30(4)
- 关键词：尾矿 ; tailings ; 碳酸盐岩型矿床 ; carbonate rock type deposit ; 环境污染 ; environmental pollution ; 广西 ; Guangxi Province
- 页码：p.106-113
- 图表：4 illus., 3 tables, 22 refs.
- 分类号：1800
- issnNo：ISSN1001-6872
- isbnNo：CN51-1143/TD
摘要
///The paper is to focus on the research of CTT-carbonate-type tailings (i.e.carbonate-rich tailings) discarded by the metal sulfide mines in north Guangxi and its adjacent districts.Methods such as X-ray diffraction, Sobek-ANC static test and Carb-ANC mineral calculation, NAG test, and Sobek-ABA, etc. were used to probe into CTT’s neutralization capacity and acidification potential,and define the threshold value for predicting acidification of CTT. The results demonstrate that: 1) the CTT can be classified into four types based on the ingredient of carbonate in tailings, they are calcite type, dolomite type,ankerite type and calcite-dolomite mixing type respectively; 2) the threshold values for predicting acidification of CTT’ are: ANC<400 kg H2SO4/t, sulfide-S (Sulfide-S=Total-S-Sulfate-S)>3.0 %, APR<1.4, NAPP>-50 kg H2SO4/t. In contrast with the threshold values used commonly in European-America states, the CCT’s ANC and Sulfide-S are about 40 and 10 times higher respectively; the APR (acid potential ratio) is also higher (common APR<1), while the NAPP (net acid production potential) is significantly lower (common NAPP>+20 kg H2SO4/t).
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