Abstract：Based on analyzing the spatial distribution patterns of surface soil and atmospheric (dry and wet) deposition of Lanzhou covering 1663 km2, the authors concluded that the average content of Hg in surface soil is 0.14×10-6 with the peak value being 6.38×10-6, and that burning coal is the main source of Hg in surface soil. The annual mean value of total Hg content in air of Lanzhou is 28.62×10-9,whereas the value during the heating period and non-heating period is 48.48×10-9 and 9.42×10-9,respectively. Ac-cording to the National Environmental Quality Standards for Soil, the area of Grade I Hg quality in surface soil of Lanzhou reaches 1376.1 km2, while Grade Ⅱ, III, Ⅳ possesses 246.8 km2, 31.7 km2 and 8.4 km2 respectively. The area of Grade I accounts for 82.75% of the whole study area, while the percentage for GradeⅡ,III,Ⅳ is 14.84%,1.91% and 0.51%, respectively. It is found that the areas of Grade III and Ⅳ are mainly distributed around the Petrochemical Plant of Xigu District and Lanzhou Second Heat and Power Factory in Chengguan and Qilihe districts.
刘文辉, 李春亮, 吴永强, 王习礼. 兰州市表层土壤中汞的生态地球化学评价[J]. 物探与化探, 2012, 36(5): 869-873.
LIU Wen-hui, LI Chun-liang, WU Yong-qiang, WANG Xi-li. THE EVALUATION OF Hg ECOLOGICAL GEOCHEMISTRY OF SURFACE SOIL IN LANZHOU. Geophysical and Geochemical Exploration, 2012, 36(5): 869-873.
[1] 中国环境监测中心.中国土壤背景值图集[M].北京:中国环境科学出版社,1990.[2] Adriano D C.Trace elements in the terrestrial environment[M].New York:Springer-Verlag,1986:1-532.[3] 成杭新,庄广民,招传东,等.北京市土壤Hg污染的区域生态地球化学评价[J].地学前缘,2008,15(5):126-143.[4] 何红蓼,李冰,杨红霞,等.环境样品中痕量元素的化学形态分析:分析技术在化学形态分析中的应用[J].岩矿测试,2005,24(1):51-58.[5] 王起超, 沈文国, 麻壮伟.中国燃煤汞排放量估算[J].中国环境科学,1999,19(4):318-321.[6] 杨丽萍,陈发虎.兰州大气降尘污染物来源研究[J].环境资源学报,2002,22(4):499-502.[7] 苏静,程金平,叶笑风,等.汞在兰州市多介质环境中的分布特征及成因初探[J].农业环境科学学报,2007,26(1):381-385.[8] 李天杰.土壤环境学[M].北京:高等教育出版社,1995.[9] 杨苏才,曾静静,王胜利,等.兰州表层土壤Cu、Pb、Zn、Hg污染评价及成因分析[J].干旱区资源与环境,2004,18(8):28-31.
