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: $ 7.48万
• 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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=660754
• 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，旨在表征和处理矿山废水中的新兴关注污染物（CEC）。在本研究的背景下，矿井废水中的CEC包括四类：1）新污染物（例如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，** 如寒冷气候; 3）难以处理污染物（例如硫酸盐、盐度）;和4）氮化合物 **（氨、亚硝酸盐和硝酸盐）。目前通过水生毒性 ** 评估对其中一些污染物进行监测。预计在不久的将来会有具体的排放标准，但由于CEC处理的操作挑战，包括复杂的化学性质、持久性、** 对氧化或还原条件的要求、缺乏经过验证的最佳环境评估以及对污染物混合物和可变污水质量的最佳效率条件的了解不足，这些标准将难以遵守。因此，矿业公司在水资源管理方面的未来优先事项应该是：1）改进/开发CEC的可持续处理技术; 2）限制残余盐度的产生; 3）产生稳定的污泥。该研究旨在提高对矿井废水特征的认识和改善CEC处理工艺的性能，主要围绕3个目标：O 1）彻底表征4个活跃 ** 矿井的废水，以识别CEC; O2）CEC处理，重点是浓度和温度;和O3）** 在处理含有CEC的实际矿井废水之前和之后进行水生毒性评价。** 方法将包括对实际流出物的表征，然后用模拟和 ** 真实的流出物进行可处理性测试，以及对最佳性能溶液进行毒性评价。一个具体的目标是制定准确的物种形成分析和治疗CEC的 ** 协议。通过对技术和环境方面的深入了解，所取得的成果将使工业伙伴和加拿大其他地方能够更好地大规模应用。该项目将培养3名博士和2名PDF。