Characterization and treatment of comtaminants of emerging concern in mine effluents

该项目涉及三所大学、一个研究中心和四个矿业合作伙伴，旨在 矿山废水中新出现的关注污染物(CECs)的表征和处理在…的背景下 本研究认为，矿山废水中的CEC包括四类：1)新污染物(如：锰、硒、锑)； 常见污染物(如砷、铜、锌)，但在敏感环境中目标浓度非常低， 例如寒冷的气候；3)难以处理的污染物(如硫酸盐、盐度)；以及4)含氮化合物 (氨、亚硝酸盐和硝酸盐)。其中一些污染物目前是通过水生毒性进行监测的。 评估。预计在不久的将来会有具体的排放标准，但很难遵守。 由于CECs治疗的操作挑战，包括复杂的化学、持久性、 氧化或还原条件的要求，缺乏经过验证的Batea，以及对以下方面的知识不足 混合污染物和可变出水水质的最佳效率条件。因此，未来 矿业公司在水管理方面的优先事项应：1)改善/发展可持续处理 CECS技术；2)限制剩余盐度的产生；3)产生稳定的污泥。这项研究旨在 矿山废水特性与CECs性能改进的研究进展 处理过程以3个目标为中心：O1)彻底表征来自4个活性物质的流出物 用于CECs识别的地雷；O2)CECs的处理，重点是浓度和温度；以及 含CECs的实际矿山废水处理前后的水毒性评价。这个 方法学将包括实际流出物的特征，然后是模拟和可处理性测试 实际流出物，并对最佳性能溶液进行毒性评估。一个具体的目标是发展 用于CECs的准确形态分析和处理的方案。所获得的结果将允许通过一个 对技术和环境方面的高级理解，更好的潜在应用 规模，在工业合作伙伴的网站和加拿大其他地方。该项目将培养3名博士和2名PDF。

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.