Heavy metal impact assessment using a chemical speciation and index-based approach**

使用化学形态和基于指数的方法进行重金属影响评估**

• 批准号: 533630-2018
• 负责人: Li, Jianbing
• 金额: $ 1.82万
• 依托单位: University of Northern British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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=657453
• 关键词: Heavy; metal; impact; assessment; using

This project aims to develop a more practical method for evaluating the impact of heavy metals in freshwater sediments by integrating chemical speciation with index evaluation, through a study in a proposed mining project area with naturally elevated metal concentrations. The local baseline concentrations of selected heavy metals will be established, and the chemical speciation characteristics of metals in sediments will be analyzed. A multivariate statistical analysis will be conducted to explore the sources of metals, and an index-based impact assessment will then be carried out using multiple indices, such as enrichment factor, contamination factor, and geo-accumulation index. The spatial distribution of metal concentrations and various index values will be analyzed to provide valuable insight for identifying the "hot spots" of heavy metal impacts in the study area. The results will help the industrial partner to effectively plan their future mining activities to minimize possible environmental impacts. Close collaboration with the industrial partner will be maintained during each phase of this project, and the related findings will provide sound basis for exploring further opportunities of research collaboration with the industrial partner. The proposed methods can also be applied to other similar impact assessment studies associated with resource development in Canada.

该项目旨在通过在金属浓度自然升高的拟议采矿项目区进行研究，将化学形态分析与指数评价相结合，开发一种更实用的方法，用于评价淡水沉积物中重金属的影响。将确定选定重金属的当地基线浓度，并分析沉积物中金属的化学形态特征。将进行多变量统计分析，以探索金属的来源，然后使用富集系数、污染系数和地质累积指数等多个指数进行基于指数的影响评估。分析了重金属浓度的空间分布和各种指数值，为确定研究区重金属影响的“热点”提供了有价值的见解。研究结果将有助于工业合作伙伴有效地规划其未来的采矿活动，以尽量减少可能的环境影响。在本项目的每个阶段，将与工业伙伴保持密切合作，相关的研究结果将为探索与工业伙伴进行进一步研究合作的机会提供良好的基础。所提出的方法也可以应用到其他类似的影响评估研究与加拿大的资源开发。