Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
University of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, FL 34945, USA.
J Hazard Mater. 2015 Dec 15;299:540-9. doi: 10.1016/j.jhazmat.2015.07.041. Epub 2015 Jul 20.
Three techniques (Isotope Ratio Analysis, GIS mapping, and Multivariate Statistical Analysis) were integrated to assess heavy metal pollution and source apportionment in peri-urban agricultural soils. The soils in the study area were moderately polluted with cadmium (Cd) and mercury (Hg), lightly polluted with lead (Pb), and chromium (Cr). GIS Mapping suggested Cd pollution originates from point sources, whereas Hg, Pb, Cr could be traced back to both point and non-point sources. Principal component analysis (PCA) indicated aluminum (Al), manganese (Mn), nickel (Ni) were mainly inherited from natural sources, while Hg, Pb, and Cd were associated with two different kinds of anthropogenic sources. Cluster analysis (CA) further identified fertilizers, waste water, industrial solid wastes, road dust, and atmospheric deposition as potential sources. Based on isotope ratio analysis (IRA) organic fertilizers and road dusts accounted for 74-100% and 0-24% of the total Hg input, while road dusts and solid wastes contributed for 0-80% and 19-100% of the Pb input. This study provides a reliable approach for heavy metal source apportionment in this particular peri-urban area, with a clear potential for future application in other regions.
三种技术（同位素比分析、GIS 制图和多元统计分析）被整合用于评估城市周边农业土壤中的重金属污染和来源分配。研究区域的土壤中镉（Cd）和汞（Hg）中度污染，铅（Pb）和铬（Cr）轻度污染。GIS 制图表明，Cd 污染源于点源，而 Hg、Pb、Cr 则可追溯至点源和非点源。主成分分析（PCA）表明，铝（Al）、锰（Mn）、镍（Ni）主要来源于自然源，而 Hg、Pb 和 Cd 则与两种不同的人为源有关。聚类分析（CA）进一步确定了化肥、废水、工业固体废物、道路灰尘和大气沉降为潜在来源。基于同位素比分析（IRA），有机肥料和道路灰尘分别占总 Hg 输入的 74-100%和 0-24%，而道路灰尘和固体废物分别占 Pb 输入的 0-80%和 19-100%。本研究为该特定城市周边地区的重金属源分配提供了一种可靠的方法，未来在其他地区具有明显的应用潜力。
