| 宁夏不同土地利用方式土壤重金属生态风险评价及来源解析 |
| 摘要点击 1490 全文点击 14 投稿时间:2025-04-07 修订日期:2025-10-12 |
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| 中文关键词 土壤重金属 土地利用方式 污染评价 APCS-MLR模型 源解析 |
| 英文关键词 soil heavy metals land use patterns pollution assessment APCS-MLR model source analysis |
| DOI 10.13227/j.hjkx.202504084 |
| 作者 | 单位 | E-mail | | 陈轲林 | 宁夏大学生态环境学院, 银川 750021 | 2956352724@qq.com | | 李虹 | 宁夏农业环境保护监测站, 银川 750002 | | | 马建军 | 宁夏农业环境保护监测站, 银川 750002 | | | 张雅琪 | 宁夏大学林业与草业学院, 银川 750021 | | | 李玉蓉 | 宁夏大学林业与草业学院, 银川 750021 | | | 杨玲 | 宁夏大学生态环境学院, 银川 750021 | | | 冯乐英 | 宁夏大学林业与草业学院, 银川 750021 | | | 代睿明 | 宁夏大学生态环境学院, 银川 750021 | | | 马琨 | 宁夏大学生态环境学院, 银川 750021 宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 银川 750021 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地, 银川 750021 | | | 庞丹波 | 宁夏大学生态环境学院, 银川 750021 宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 银川 750021 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地, 银川 750021 | | | 陈林 | 宁夏大学生态环境学院, 银川 750021 宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 银川 750021 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地, 银川 750021 | chenlin198388@163.com |
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| 中文摘要 |
| 以宁夏地区不同土地利用方式土壤为研究对象,在分析测定样品中As、Hg、Cr、Ni、Cu、Zn、Cd和Pb含量特征的基础上,利用地累积指数和潜在生态风险指数评估金属污染风险,并结合相关性分析、主成分分析和绝对主成分得分-多元线性回归(APCS-MLR)模型对重金属污染来源进行溯源分析. 结果表明,旱地土壤重金属元素Hg、Zn和Cd的含量平均值,以及水浇地和水田土壤中的Hg、Cu、Zn、Cd和Pb的含量平均值均超过了宁夏的土壤背景值. 不同土地利用方式下土壤8种重金属含量平均值均低于风险筛选值和管制值;地累积指数和潜在风险指数均显示Hg和Cd在这3类用地中较其他元素污染最为严重,是3种不同用地方式土壤的主要污染因子;APCS-MLR模型分析显示,旱地的污染来源包括农业源、自然源、工业源和未知源,占比分别为36.6%、20.1%、14.1%和29.2%. 水浇地的污染来源为自然-交通-农业的混合源、农业源、工业源和未知源,占比分别为50.08%、31.32%、6.65%和11.94%. 水田的污染来源包括自然-农业的复合源、农业源、工业源和未知源,占比分别为46.81%、21.24%、12.65%和19.30%. 通过深入分析污染来源和影响因素,可为制定针对性的污染防控措施提供重要依据,推动了农业可持续发展及生态环境保护的进程. |
| 英文摘要 |
| Taking the soil with different land use patterns in Ningxia as the research object, based on the analysis and determination of the content characteristics of As, Hg, Cr, Ni, Cu, Zn, Cd, and Pb in the samples, the geoaccumulation index and the potential ecological risk index were used to evaluate the risk of metal pollution, and the traceability analysis of the sources of heavy metal pollution was carried out by combining correlation analysis, principal component analysis, and the absolute principal component score-multiple linear regression (APCS-MLR) model. The average contents of Zn and Cd, as well as the average contents of Hg, Cu, Zn, Cd, and Pb in irrigated and paddy field soils exceeded the soil background values in Ningxia. The eight heavy metals in the soil under different land use patterns were lower than the risk screening and control values. The land accumulation index and potential risk index showed that Hg and Cd were the most polluted compared to other elements in these three types of land and were the main soil pollution factors of the three different land use methods. The analysis of the APCS-MLR model showed that the pollution sources of dryland included agriculture, nature, industry, and their mixtures, accounting for 36.6%, 20.1%, 14.1%, and 29.2%, respectively. The pollution sources of irrigated land were nature, transportation-agriculture mixed sources, agricultural sources, industrial sources, and nature-transportation-agriculture-industry mixed sources, accounting for 50.08%, 31.32%, 6.65%, and 11.94%, respectively. The pollution sources of paddy fields included natural-agricultural composite sources, agricultural sources, industrial sources, and natural-agricultural-industrial mixed sources, accounting for 46.81%, 21.24%, 12.65%, and 19.30%, respectively. Through in-depth analysis of pollution sources and influencing factors, this study provides an important basis for formulating targeted pollution prevention and control measures and promotes the process of sustainable agricultural development and ecological environmental protection. |