ABSTRACT

Heavy metals with a high concentration value in the soil are detrimental to the soil ecosystem. In this study, 96 samples were taken from two soil sections (A-A, B-B) in the mouth of the Juanshui River to analyze heavy metal pollution. Soil pollution status and the ecological risk were investigated using Nemerow and the potential ecological risk index. The sources affecting pollution and pollution distribution characteristics were exhibited based on Inverse Distance Weighted (IDW), principal component analysis (PCA), and Statistics. Pollution in the soil of the mouth of the Juanshui River had reached a moderate level. Hg and Cd were the main potential ecological risk contributions. Coal burning and agricultural chemicals were the predominant pollution source in the study area. In order to avoid the soil of the river mouth becoming a secondary pollution source for water bodies and resulting in a vicious circle of heavy metal pollution, heavy metals in the soil of the river mouth of China should be mainly managed and controlled.

摘要

土壤中高浓度重金属对土壤生态系统有害。本研究选取了涓水河口两个土壤剖面（AA、BB）的96个样本，对重金属污染进行了分析。采用Nemerow和潜在生态风险指数调查土壤污染状况和生态风险。基于反距离加权法（IDW）、主成分分析法（PCA）和统计法展示影响污染源和污染分布特征。圈水河口土壤污染已达到中等水平。Hg和Cd是主要的潜在生态风险贡献。燃煤和农药是研究区的主要污染源。