洪湖市某地区土壤环境质量评价

An assessment of the soil environmental quality in a certain area of Honghu City

基于对洪湖市某地区土壤中的主要重金属元素的分布、赋存状态和含量的研究,依据土壤环境质量评价指标,确定八种主要重金属元素(Hg、Cd、Pb、Cu、Zn、Cr、Ni及As)作为评价对象。根据国家土壤环境质量标准,采用一票否决法,结果表明,该区土壤中重金属有害元素Cd对土壤环境的影响最为明显,该区Ⅰ级、Ⅱ级土壤面积227.71km^2,占总面积的84.96%;Ⅲ级、Ⅳ级土壤面积40.31km^2,占总面积的15.04%。上述研究对洪湖市的环境保护和城市土壤污染治理具有十分重要的意义。

Based on an analysis of the distribution, modes of occurrence and the content of major heavy metal elements insoil in the study area of Honghu City in this paper, the authors identified eight major heavy metal elements （Hg〉Cd〉Pb、 Cu〉Zn〉Cr〉Ni〉 As） as evaluation objects in the light of the soil environmental quality evaluation iNational Environmental Quality Standards for Soil and through the method of one-vote vmost significant influence on the soil environment is cadmium of the heavy metal elements in the soil. The area of Grade I and n in surface soil reaches 227.71 square kilometers,while the area of Grades Ⅲ and Ⅳ possesses 40.3 1 square kil-ometers. The area of Grade Ⅰ and Ⅱ accounts for 84.96% of the whole area, while the percentage for Grade Ⅲ and Ⅳ is 15.04 %/The study is of great importance to the environmental protection and urban soil pollution control of Honghu City.