| 宋铮宇,王振亮,段壮.皖北农业区灌溉水重金属元素及典型离子浓度特征、来源及风险评价[J].矿产勘查,2026,17(5):912-921 |
| 皖北农业区灌溉水重金属元素及典型离子浓度特征、来源及风险评价 |
| Characteristics, source, and risk assessment of heavy metals and typical Ions in irrigation water of the northern Anhui agricultural region, China |
| 投稿时间：2025-12-25 |
| DOI：10.20008/j.kckc.202605014 |
| 中文关键词: 谯城区 灌溉水 重金属 生态风险 PMF |
| 英文关键词: Qiaocheng District irrigation water heavy metals ecological risk PMF |
| 基金项目:本文受安徽省2023年度第一批公益性地质工作项目(2023-g-1-14)资助。 |
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| 中文摘要: |
| 皖北地区是中国重要的粮食主产区，灌溉水环境质量直接关系到区域粮食安全与农田生态系统健康。为系统揭示皖北地区灌溉水中重金属及典型离子的的含量水平、空间分布特征及生态风险，本文以亳州市谯城区为研究区，采集地表水样品 87件和机井水样品 63件，测定 As、Hg、Cd、Cr(Ⅵ)、Pb、Cu、Zn以及 CN-、Cl-和 F-等指标。采用正定因子矩阵分析(PMF)模型对主要元素来源进行解析，并结合单因子污染指数、内梅罗综合污染指数和潜在生态风险指数对灌溉水污染风险进行综合评价。结果表明，研究区灌溉水中重金属等浓度水平较低，地表水和机井水均呈现明显的低地球化学背景特征。Hg仅在地表水中检出，Cd、Cr(Ⅵ)和 CN-在两类水体中浓度普遍较低，整体以自然背景控制为主。PMF源解析结果显示，地表水中元素来源以农业活动贡献为主，其次为交通及局地工业活动；地下水中元素组成则主要受地质背景控制，人为扰动影响相对有限。污染风险评价结果表明，除 Cl-和 F-在个别采样点存在一定污染风险外，其余重金属污染程度和潜在生态风险均处于较低水平。总体来看，研究区灌溉水环境质量良好，重金属污染风险处于较低水平。本研究可为皖北地区灌溉水环境质量评价及农业水资源管理提供基础地球化学背景数据。 |
| 英文摘要: |
| The northern Anhui region is one of China’s major grain-producing areas, and the quality of irriga-tion water is closely related to regional food security and the health of agroecosystems. To systematically reveal theconcentration levels, spatial distribution characteristics, and ecological risks of Heavy metals and typical ions in irri-gation water in northern Anhui, Qiaocheng District of Bozhou City was selected as the study area. A total of 87 sur-face water samples and 63 groundwater samples from irrigation wells were collected and analyzed for As, Hg, Cd, Cr(Ⅵ), Pb, Cu, Zn, as well as CN-, Cl-, and F-. A Positive Matrix Factorization (PMF) model was applied to identify themajor sources of elements, and the single-factor pollution index, Nemerow comprehensive pollution index, and po-tential ecological risk index were used to comprehensively assess pollution risks. The results show that the overallconcentrations of PTEs in irrigation water are relatively low, and both surface water and groundwater exhibit dis-tinctly low geochemical background characteristics. Mercury was detected only in surface water, indicating that itmainly originates from atmospheric deposition and surface inputs associated with industrial activities; meanwhile,Cd, Cr(Ⅵ), and CN-exhibited generally low concentrations in both types of water and were predominantly con-trolled by natural background levels. PMF source apportionment suggests that surface water elements are primarilyinfluenced by agricultural activities, followed by traffic emissions and localized industrial inputs, whereas groundwa-ter composition is mainly governed by geological background conditions, with relatively limited and spatially local-ized anthropogenic disturbances. Pollution risk assessment indicates that except for Cl-and F-, which pose certainpollution risks at a few sampling sites, the contamination levels and potential ecological risks of other heavy metalsremain low. Overall, the irrigation water quality in the study area is favorable, and the risk of heavy metal pollutionis generally controllable. This study provides fundamental geochemical background data to support irrigation waterquality assessment and agricultural water resource management in northern Anhui. |
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