摘要
本文根据灌区污染源的类型,重点选择了酚、氰化物、汞、铬、砷五种有害元素为评价因素,通过布、采样(土样、粮食样)分析取得近600个数据.依据国家有关标准以及土壤粮食污染积累起始值,采用土、粮结合的四级评价法,综合分析了灌区农由环境污染现状与环境质量评价结果。分析了各单项污染物的污染范围、程度以及灌区农田环境污染与污染源的关系.
Based on the types of pollutant sources in the irrigated areas, this paper takes five poisonous elements: phenol, cyanogen compound, mercury, chromium and arsenic for appraisal for appraisal factors, and has gained nearly six hundred data through arranging sample points, Sampling (Soil and grain) and analysing the samples. According to the concerned standard of our country as well as the initial value accumulated in the pollution of soil and grain and by using the four-class appraisal method of the combination of soil and grain, the paper gives an all-around of the present situation of the polluted environment on the farmland in the irriga- ted areas and the appraisal result of the environment quality. Besides, the paper also gives an analysis of the range and the degree where the environment of the farmland in the irrigated areas is polluted by each pollutant and the relation' between the polluted environment and the pollutant source.
关键词
污染源
环境污染
环境质量评价
pollutant source
apprasial factor
environmental pollution
apprasial of environmental quality
