大文河流域土壤肥力质量与重金属污染分析

Le Hou, Niu Beibei, Li Xinju, Hongxin Shen, Li Fuqiang, W. Ying
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引用次数: 2

摘要

了解流域土壤肥力状况和重金属污染状况,对有针对性的环境管理和治理具有重要意义。以中国黄河下游地区的一个子流域——大文河流域为研究区。2019年10月共采集表层土壤样品107份,采样点主要位于大文河干流10 km范围内。基于实测土壤养分指标(有机质、全氮、全磷、全钾)和重金属含量(As、Hg、Cd、Cr、Pb),结合Nemerow指数法、土地积累指数法和一般Kriging插值法,评价了DRB土壤肥力和重金属污染的现状和空间分布。结果表明:DRB土壤肥力总体处于正常或低于正常水平,泰安市、新泰市和宁阳县部分地区土壤养分含量较高;研究区土壤重金属含量基本处于安全水平,但单项污染指数和地积指数表明,个别样品重金属污染程度为轻至中度,城市和工业集聚区重金属含量较高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of Soil Fertility Quality and Heavy Metal Pollution in the Dawen River Basin, China
Understanding the soil fertility status and heavy metal pollution is of great significance for targeted environmental management and governance in a basin. The Dawen River Basin (DRB), a sub-basin in the lower Yellow River area in China, was taken as the study area. A total of 107 surface soil samples were collected in the DRB in October 2019, and the sampling points were mainly located within 10 km of the mainstream of the Dawen River. Based on the measured soil nutrient indicators (organic matter, total nitrogen, total phosphorus, and total potassium) and heavy metal contents (As, Hg, Cd, Cr, and Pb), the status and spatial distribution of soil fertility and heavy metal pollution in the DRB were evaluated by combining the use of the Nemerow index method, the land accumulation index method, and the general Kriging interpolation method. The results showed that the soil fertility in the DRB was generally at a normal level or below, while some areas of Taian City, Xintai City, and Ningyang County had relatively high soil nutrient content. The content of heavy metals in the soil of the DRB was mainly at a safe level, but the single pollution index and geo-accumulation index implied that there was light to moderate pollution of heavy metals in individual samples, and the content of heavy metals in urban and industrial agglomerations is relatively high.
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