Characterization and treatment of comtaminants of emerging concern in mine effluents

矿山废水中新出现的污染物的表征和处理

• 批准号: 530091-2018
• 负责人: Neculita, CarmenMihaela
• 金额: $ 8.86万
• 依托单位: Université du Québec en Abitibi-Témiscamingue
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697948
• 关键词: Characterization; treatment; comtaminants; emerging; concern

This project involves three universities, one research center, and four mining industry partners, and aims at the characterization and treatment of contaminants of emerging concern (CECs) in mine effluents. In the context of this study, the CECs in mine effluents include four categories: 1) new contaminants (e.g. Mn, Se, Sb); 2) common contaminants (e.g. As, Cu, Zn), but with very low target concentrations in sensitive environments, such as the cold climate; 3) difficult to treat contaminants (e.g. sulfate, salinity); and 4) nitrogen compounds (ammonia, nitrites, and nitrates). Some of these contaminants are currently monitored via aquatic toxicity assessment. Specific discharge criteria are expected in the near future, but they would be difficult to comply with because of the operational challenges for CECs treatment, including a complex chemistry, persistency, requirements of oxidizing or reducing conditions, lack of a proven BATEA, and insufficient knowledge as to the optimal efficiency conditions with mixtures of contaminants and variable effluent quality. Thus, future priorities of mining companies in water management should: 1) improve/develop sustainable treatment technologies for CECs; 2) limit residual salinity creation; and 3) produce stable sludge. The study, which aims knowledge advancing on the characterization of mine effluents and performance improvement of CECs treatment processes, is centered around 3 objectives: O1) thorough characterization of effluents from 4 active mines for CECs identification; O2) treatment of CECs, with focus on concentration and temperature; and O3) evaluation of aquatic toxicity, before and after treatment of actual mine effluents containing CECs. The methodology will consist of characterization of actual effluents, followed by treatability testing with mock and real effluents, and toxicity evaluation of the optimal performance solution. A specific goal is to develop protocols for accurate speciation analysis and treatment of CECs. The results obtained would allow, through an advanced understanding of the technological and environmental aspects, better potential applications on a large scale, on the sites of the industrial partners and elsewhere in Canada. The project will train 3 PhD and 2 PDF.

该项目涉及三所大学，一个研究中心和四个采矿业合作伙伴，旨在 表征和处理矿井废水中的新兴关注污染物（CEC）。背景下 本研究中，矿井废水中的CEC包括四类：1）新污染物（如Mn、Se、Sb）; 2） 常见污染物（如As、Cu、Zn），但在敏感环境中目标浓度非常低， 如寒冷的气候; 3）难以处理的污染物（如硫酸盐、盐度）;以及4）氮化合物 （氨、亚硝酸盐和硝酸盐）。其中一些污染物目前通过水生毒性监测 考核预计在不久的将来会有具体的排放标准，但很难遵守 由于CEC处理的操作挑战，包括复杂的化学，持久性， 氧化或还原条件的要求，缺乏经证实的最佳环境评估，以及对以下方面的知识不足 最佳效率条件与污染物的混合物和可变的出水水质。因此，未来 矿业公司在水资源管理方面的优先事项应：1）改善/发展可持续处理 CEC技术; 2）限制残余盐度的产生; 3）产生稳定的污泥。该研究旨在 关于矿井废水特性和CEC性能改进的知识进展 处理过程，是围绕3个目标：O 1）彻底表征废水从4个活性 O2）CEC的处理，重点是浓度和温度; O3） 评价水生毒性，之前和之后的实际矿山废水含有CEC的处理。的 方法将包括实际流出物的表征，然后用模拟和 真实的废水，和毒性评价的最佳性能的解决方案。一个具体目标是发展 准确的物种形成分析和CEC治疗方案。所获得的结果将允许，通过一个 对技术和环境方面的深入了解，更好地在大型 规模，在工业合作伙伴和加拿大其他地方的网站上。该项目将培养3名博士和2名PDF。