农业工程学报2024，Vol.40Issue(3)：321-327,7.DOI:10.11975/j.issn.1002-6819.202309008
安徽矾矿土壤重金属污染源解析模型对比与优选
Comparison and preference of source analysis models for heavy metal contamination of soil from alum mines in Anhui Province,China
摘要
Abstract
Soil pollution is becoming increasingly serious due to resource exploitation in mining areas,which directly affects the stability of the surrounding soil and water environment,and the accurate prediction of heavy metal pollution source analysis has an important guiding role in scientific mine remediation and treatment.On the basis of the previous study,in order to improve the interpretation of the soil media model,positive matrix factorization(PMF)and absolute factor analysis-multiple linear regression(APCS-MLR)models,which have a high degree of maturity and accuracy in the evaluation of heavy metal source analysis in soils,were further selected to enrich the UNMIX model in the previous study.The results of the multiple receptor models analyzing the sources of heavy metal contamination and the contribution of the sources were combined with the ecological risk assessment method to determine the most suitable model in study area under quantitative conditions.The results showed that:1)the ecological high-risk areas were mainly concentrated in the south and east part of the study area,and Cd was the main risk element of the mine;the mean value of igeoaccumulation index was 3.75,which was highly consistant with the mean value of 731.22 for the potential ecological risk index though latter provided a more comprehensive evaluation of ecological hazards.2)Comparing the results of the three models,the PMF model resolved four pollution sources:coal combustion source,natural-traffic integrated source,natural source and atmospheric deposition source,and the source contribution rates are 38.15%,20.62%,24.28%and 16.95%,respectively.3)The fitted variables R2 in the PMF model reached to 0.96,which showed the best fitting effect.The PMF model refines source apportionment by accounting for sampling point errors and accurately ascertaining pollution sources and their contributions,making it highly suitable for complex mine-contaminated soils in realistic research settings.The findings of this study can provide a reference for tracing the origins of contaminants,which is essential for the remediation efforts of polluted soils following mining activities in the area.关键词
重金属/污染/模型/源解析/矿区生态修复/土壤环境管理Key words
heavy metals/pollution/models/source analysis/ecological remediation of mining areas/soil environmental management分类
农业科技引用本文复制引用
周蓓蓓,杨泽昊,安凤秋,李文倩,郭江,陈晓鹏,干彬,杨玉姣,杨强,范东亮,杨勰..安徽矾矿土壤重金属污染源解析模型对比与优选[J].农业工程学报,2024,40(3):321-327,7.基金项目
国家自然科学基金优秀青年科学项目(52222903) （52222903）
国家自然科学基金面上项目(41977007) （41977007）
陕西省科技厅项目一般项目农业领域(2022NY-078) （2022NY-078）
清洁能源与生态水利工程关键技术研究项目(QJNY-2019-01) （QJNY-2019-01）
