摘要
以土壤环境地球化学研究为主线,以贵州省贵阳市8064km2为研究区域,将土壤重金属污染元素铅的空间分布规律与环境地球化学机理研究相结合,建立区域土壤环境地球化学基线,选用合适的判别指标判识自然作用过程与人类活动过程对土壤环境的影响。得到以下结论:贵阳市表层土壤中铅的基线值为14.8mg·kg-1,样品中铅元素含量大于70.1mg·kg-1的样品可能遭受人为污染的影响。地质累积指数分析结果显示贵阳市18%的表层土壤未受铅的污染,47%的表层土壤在无污染到中度污染之间,28%的中度污染,6%的表层土壤介于中度污染到强污染之间,1%的强污染。污染程度指数分析则显示贵阳市49.9%的表层土壤未受到铅的污染,铅的污染程度最大为8.11,总污染程度略大于0,即受到轻微污染。
The characteristics of environmental geochemistry of heavy metal pollutant plumbum （Pb） in the surficial soil of Guiyang,Guizhou,China was studied. The baseline concentration of Pb in soil and the geochemistry norms have been established to distinguish the nature or artificial influence on the environment. The statistical analysis indicated that the baseline of Pb in Guiyang was14.8 mg·kg^-1. Geoaccumulation Index analysis indicated that the unpolluted surface soils accounts for 18 %,47% between unpollution to mid-pollution,28% for mid-pollution,6% between mid-pollution to severe pollution,and only 1% severe pollution. The maximal of Pb contamination degree （CD） is 8.11. CD analysis indicated that the unpolluted surface soils accounts for 49.9%. The total Cd is slightly over zero. So surficial soil in Guiyang suffer slight Pb pollution.
出处
《生态环境》
CSCD
北大核心
2007年第4期1154-1159,共6页
Ecology and Environmnet
基金
贵州省自然科学基金项目(黔教科2004111)
关键词
铅
基线
污染
贵阳
土壤
Pb
baseline
pollution
Guiyang
soil
