Mobility assessment of potentially toxic elements contained in flotation and cyanidation tailings dam from gold mine located in Brazil.

IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Anais da Academia Brasileira de Ciencias Pub Date : 2024-11-15 eCollection Date: 2024-01-01 DOI:10.1590/0001-3765202420240192
Danielle C DE Castro, Nathalia O A Dos Anjos, Daniel A Barcelos, Karoline K Ferreira, Fernanda A N G DA Silva, Fernanda V M Pontes, Aline M Dos S Teixeira, Zuleica C Castilhos
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Abstract

In Brazil, the recurring environmental impacts due to insufficient inspection and inadequate management of potentially toxic mining tailings have raised significant concerns. The study concentrates on examining the mobility of elements in flotation (ft) and cyanidation (ct) tailings from gold mining operations, following successive extractions. The influence of extractants on the release of elements from both ft and ct samples, including As, Cd, Cu, Cr, Pb, Se, and Zn, was examined and compared to the ABNT NBR 10004:2004 standard. The samples were obtained from a gold mining company in Brazil. Sequential extraction tests for ft and ct samples were conducted to simulate weathering effects, using solutions of 0.1 mol L-1 citric acid, 0.1 mol L-1 acetic acid, 0.1 mol L-1 oxalic acid, 0.1 mol L-1 ammonium acetate, and distilled water at pH 5.5. The results revealed that the established limits for Pb and Cd under the ABNT NBR 10004:2004 standard were exceeded in a 1:1 tailing-to-extractor ratio. In ct samples, both elements surpassed the standard limits for all extractors, except for Cd when using water. In ft samples, Pb exceeded the limits with all acids, while Cd exceeded the limits only in the presence of acetic acid and ammonium acetate.

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巴西金矿浮选和氰化尾矿坝所含潜在有毒元素的流动性评估。
在巴西,由于对具有潜在毒性的采矿尾矿检查不足和管理不善,经常出现环境影响,引起了人们的极大关注。本研究集中考察了金矿开采作业中的浮选(ft)和氰化(ct)尾矿在连续萃取后元素的流动性。研究考察了萃取剂对ft和ct样品中元素释放的影响,包括砷、镉、铜、铬、铅、硒和锌,并与 ABNT NBR 10004:2004 标准进行了比较。样品来自巴西的一家金矿公司。使用 0.1 mol L-1 柠檬酸、0.1 mol L-1 乙酸、0.1 mol L-1 草酸、0.1 mol L-1 乙酸铵和 pH 值为 5.5 的蒸馏水溶液,对ft 和 ct 样品进行了顺序萃取测试,以模拟风化作用。结果表明,在尾矿与提取物的比例为 1:1 的情况下,铅和镉的含量超出了 ABNT NBR 10004:2004 标准的规定限值。在 ct 样品中,除使用水提取镉外,所有提取器提取的这两种元素都超过了标准限值。在 ft 样品中,铅在所有酸中都超标,而镉仅在醋酸和醋酸铵中超标。
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来源期刊
Anais da Academia Brasileira de Ciencias
Anais da Academia Brasileira de Ciencias 综合性期刊-综合性期刊
CiteScore
2.20
自引率
0.00%
发文量
347
审稿时长
1 months
期刊介绍: The Brazilian Academy of Sciences (BAS) publishes its journal, Annals of the Brazilian Academy of Sciences (AABC, in its Brazilianportuguese acronym ), every 3 months, being the oldest journal in Brazil with conkinuous distribukion, daking back to 1929. This scienkihic journal aims to publish the advances in scienkihic research from both Brazilian and foreigner scienkists, who work in the main research centers in the whole world, always looking for excellence. Essenkially a mulkidisciplinary journal, the AABC cover, with both reviews and original researches, the diverse areas represented in the Academy, such as Biology, Physics, Biomedical Sciences, Chemistry, Agrarian Sciences, Engineering, Mathemakics, Social, Health and Earth Sciences.
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