影响中国近地面γ-HCH浓度和沉积量的贡献源评估  

Sources of γ-HCH in Chinese air at near-surface level and deposited to Chinese soil

作　　者：田崇国[1] 任南琪[1] 马建民[2] 李一凡[1,2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,城市水资源与水环境国家重点实验室,国际持久性有毒物质联合研究中心,黑龙江哈尔滨150090 [2]加拿大环境部科学技术局

出　　处：《中国环境科学》2009年第9期897-901,共5页China Environmental Science

基　　金：中国-北美林丹合作项目

摘　　要：采用CanMETOP模型,模拟了2005年欧洲(去除前苏联所占区域)、印度、中国和前苏联4个主要的γ-HCH土壤残留区域的γ-HCH通过挥发、大气传输和沉积对中国环境的影响.结果表明,中国东部和西部地区近地面的年均浓度分别为10～100pg/m3和1～10pg/m3.中国本地源对东中部和东北部的浓度贡献在90%以上,对东南部地区的贡献为30%～80%,印度源对该地区的贡献为10%～30%;印度源对西部的近地面浓度贡献在50%以上;欧洲源和前苏联源主要影响西北地区,贡献比例均在10%左右.中国本地源对东北区域的总沉积贡献最大(75%),西北区域和南部区域的总沉积均以印度源贡献为主,贡献比例分别为63%和67%.整个中国,年总沉积量为691t,贡献比例依次为印度源(55.1%),中国源(31.6%),欧洲源(3.6%),前苏联源(2.5%).CanMETOP model was employed to assess the contributions to γ-HCH in Chinese air and soil from four major γ-HCH residual regions, including India, the former Soviet Union （FSU）, Europe （excluding the FSU）,and China itself in 2005. Modeled annual average air concentrations of γ-HCH at 1.5 m height above ground surface ranged for 10-100 pg/m^3 in eastern region, and 1-10 pg/m^3 in western region of China. The former was mainly due to Chinese source （30%-80%）, while the major of the later was attributable to Indian source （〉 50%）. The European and FSU sources both mostly contributed to the Chinese northwestern region （10%）. The contributions of deposition in China were also different in different area. Chinese source dominated the deposition of γ-HCH in the northeastern area （75%）, while Indian source made the largest contribution in northwestern （63%） and southern （67%） areas of China. For whole China, annual total deposition of γ-HCH in 2005 was 691 t, among which, 55.1% was from India, 31.6% was from China, 3.6% was from Europe, and 2.5% was from the FSU.

关 键 词：模拟 Γ-HCH 中国 大气远距离传输 

分 类 号：X131[环境科学与工程—环境科学]