Development of a Neutral Mine Drainage Prediction Method Using Modified Kinetics Tests and Assessment of Sorption Capacities.

IF 2.1 4区 环境科学与生态学 Q3 WATER RESOURCES
Mine Water and the Environment Pub Date : 2025-01-01 Epub Date: 2025-01-21 DOI:10.1007/s10230-025-01023-6
Vincent Marmier, Benoît Plante, Isabelle Demers, Mostafa Benzaazoua
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引用次数: 0

Abstract

Prediction of neutral mine drainage (NMD) chemistry is difficult with the predictive tools developed for acid mine drainage (AMD). To address this problem, a methodology to assess NMD risk was developed using Lac Tio Mine waste rock as a positive control. The methodology compares the maximum potential for contaminant release (in this case, nickel) using the waste rock's total metal content and the sorption capacity of the material (qmax) combined with a mineralogical assessment and modified kinetic leaching experiments that use a chelating agent to prevent immobilization processes from occurring. The results indicate that the potential NMD risk associated with Lac Tio waste rock would be assessed as probable with the proposed methodology. Indeed, the total nickel concentrations in the Lac Tio waste rock range from 270 to 590 mg/kg. The nickel is found in Ni-rich pyrites, which proved to effectively leach when no immobilization occurred (using ethylenediaminetetraacetic acid, or EDTA, leaching). The material's sorption capacities were between 127 and 197 mg/kg of Ni. The sorption capacity to total Ni content ratio of the material was < 1, indicating that the material has fewer sorption sites for Ni than Ni contained within the material, thereby underscoring the potential risk of Ni leaching over time. The approach proposed in this work provides an additional tool for the assessment water quality risk associated with NMD.

Supplementary information: The online version contains supplementary material available at 10.1007/s10230-025-01023-6.

基于修正动力学试验和吸附能力评价的中性矿井排水预测方法的发展。
随着酸性矿井水预测工具的发展,中性矿井水(NMD)化学预测变得困难。为了解决这一问题,开发了一种评估NMD风险的方法,使用Lac Tio矿山废石作为阳性对照。该方法利用废石的总金属含量和材料的吸附能力(qmax),结合矿物学评估和改进的动力学浸出实验(使用螯合剂防止固定过程的发生),比较污染物释放的最大潜力(在本例中为镍)。结果表明,采用所建议的方法,可以评估与Lac Tio废石有关的潜在NMD风险。事实上,Lac Tio废岩中总镍浓度在270 ~ 590 mg/kg之间。镍是在富镍的黄铁矿中发现的,当没有固定发生时(使用乙二胺四乙酸或EDTA浸出),它被证明是有效的浸出。该材料对Ni的吸附量在127 ~ 197 mg/kg之间。补充资料:网上有补充资料,网址:10.1007/s10230-025-01023-6。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.00
自引率
14.30%
发文量
62
审稿时长
3 months
期刊介绍: Mine Water and the Environment welcomes original contributions that address either technical questions or practical issues related to the evaluation, prediction, prevention, or control of water problems at mining operations or their impact on the environment. The journal and its audience is interdisciplinary. Manuscripts should convey new technical information and be of potential interest to researchers and/or practitioners in this field. Laboratory and field experiments, modelling efforts, studies of relevant field sites, technical evaluations of new technology, and engineering applications are all appropriate.
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