Agro-Environmental Protection Institute of Ministry of Agriculture, Key Laboratory of Production Environment and Agro-Product Safety, Tianjin, China.
Bull Environ Contam Toxicol. 2010 Sep;85(3):287-90. doi: 10.1007/s00128-010-0070-5. Epub 2010 Jul 18.
Representative soil samples (n = 86) of suburban areas in Tianjin (Xiqing, Dongli, Jinnan, Beichen) were evaluated for heavy metals. The results showed that the average concentration of Cr, Cu, Zn, As, Cd, Pb and Hg in soil of Tianjin suburban was 101.0, 67.0, 100.6, 9.5, 0.49, 52.5 and 0.97 mg/kg, respectively. Pollution of Cr and Zn were minimal compared to the other elements while concentrations of Cd and Hg were higher than their natural background values. Spatial variations of Cd, Hg, Pb and Cu in soil were illustrated; Pollution status and comparison in the four districts were also investigated. Higher concentrations of Hg and Cd were found in soils of Beichen than others indicating that Beichen was suffering from metal contamination. Principal Component Analysis in combination with local specific environment suggested that heavy metal contamination had different origination. Wastewater and sludge irrigation, air deposition might be the most important sources. These results, especially the spatial distribution of pollutants, would be helpful to develop proper management strategies and decrease source pollution by various remediation practices in Tianjin, China.
对天津市（西青、东丽、津南、北辰）郊区的 86 个有代表性的土壤样本进行了重金属评估。结果表明，天津市郊区土壤中 Cr、Cu、Zn、As、Cd、Pb 和 Hg 的平均浓度分别为 101.0、67.0、100.6、9.5、0.49、52.5 和 0.97mg/kg。与其他元素相比，Cr 和 Zn 的污染最小，而 Cd 和 Hg 的浓度高于其自然背景值。本文还说明了土壤中 Cd、Hg、Pb 和 Cu 的空间变化，调查了四个区的污染状况和比较。在北辰区的土壤中发现了更高浓度的 Hg 和 Cd，表明北辰区正在遭受金属污染。主成分分析结合当地特定环境表明，重金属污染有不同的来源。废水和污泥灌溉、大气沉降可能是最重要的来源。这些结果，尤其是污染物的空间分布，将有助于制定适当的管理策略，并通过各种修复实践在中国天津减少源污染。
