摘要
对取自青藏高原古里雅冰帽的冰芯上部20m的样品中有毒金属镉反映的大气污染进行了研究、利用电感耦合等离子体质谱仪对镉的浓度进行了检测,镉的浓度在2.28—301pg·ml^-1,平均为51pg·ml^-1,镉的浓度高于极地雪冰相应时间内的浓度.冰芯对应的时间跨度从1900年到1901年,在这一时间段内镉的浓度呈增加趋势.在八十年代至1900年的这一时间段内增加趋势更明显,反映了人类活动对该地区大气的污染呈明显的上升趋势 分析表明镉主要来自西亚及南亚有关国家的污染物.镉的浓度在1900年达到最大,与这一年发生的海湾战争期间大量的石油燃烧有关.
The atmosphere pollution recorded by cadmium in the Guliya ice core from Qinghaitibet plateau is studied in this paper. The concentrations of Cadmium are determined by ICP-MS. The concentrations are in the range of 2.28-301pg·ml-1 with an average value of 51 pg·ml-1, which is higher than that of polar snow and ice. The concentrations of cadmium present a increasing trend from 1900 to 1991, especially in 1980 's, which indicates that the atmosphere pollution by human activity was increasing during this time. The sources of cadmium are mainly related to the pollution of western and southern Asian countries. The high concentration of cadmium in 1991 may be related with pollutants origining from the oil fire during Gulf war this year.
出处
《环境化学》
CAS
CSCD
北大核心
2000年第2期176-180,共5页
Environmental Chemistry
基金
国家重点基础发展规划G1998040800经费资助
中国科学院青藏高原研究项目KZ951-Al-204和KZ95T-06经费资助
中国科学院兰州冰川冻土研究所冰芯与寒区开放实验开放基金资助
国家自然科学基金49801004资助
关键词
镉
冰芯
青藏高原
大气污染
大气监测
cadmium, human activity, icecore, Qinghaitibet plateau.
