物探与化探2012，Vol.36Issue(5)：869-873,5.
兰州市表层土壤中汞的生态地球化学评价
THE EVALUATION OF Hg ECOLOGICAL GEOCHEMISTRY OF SURFACE SOIL IN LANZHOU
摘要
Abstract
Based on analyzing the spatial distribution patterns of surface soil and atmospheric (dry and wet) deposition of Lanzhou covering 1 663 km2,the authors concluded that the average content of Hg in surface soil is 0. 14 x 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. According to the National Environmental Quality Standards for Soil ,the area of Grade I Hg quality in surface soil of Lanzhou reaches 1 376. 1 km2,while Grade II ,III,IV possesses 246. 8 km2,31.7 km3 and 8.4 km2 respectively. The area of Grade I accounts for 82.75% of the whole study area,while the percentage for Grade II ,III,IV is 14. 84%,1.91% and 0.51% ,respectively. It is found that the areas of Grade HI and IV are mainly distributed around the Petrochemical Plant of Xigu District and Lanzhou Second Heat and Power Factory in Chengguan and Qilihe districts.关键词
汞污染/地球化学特征/生态评价/兰州市Key words
Hg pollution/geochemical characteristics/ecological evaluation/Lanzhou分类
天文与地球科学引用本文复制引用
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):869-873,5.
