环境科学
環境科學
배경과학
CHINESE JOURNAL OF ENVIRONMENTAL SCIENCE
2015年
3期
809-816
,共8页
覃蔡清%王永敏%彭玉龙%王定勇
覃蔡清%王永敏%彭玉龍%王定勇
담채청%왕영민%팽옥룡%왕정용
汞%汞形态%湿沉降%沉降量%重庆
汞%汞形態%濕沉降%沉降量%重慶
홍%홍형태%습침강%침강량%중경
mercury%mercury species%precipitation%deposition fluxes%Chongqing
于2013年4月至2014年3月连续1 a,利用湿沉降自动采样器采集了重庆缙云山的雨水样品,分析了样品中不同形态汞的含量,并计算其沉降量.结果表明,降水中总汞( THg)、溶解态汞( DHg)、颗粒态汞( PHg)、活性汞( RHg)、总甲基汞(MeHg)、溶解态甲基汞(DMeHg)、颗粒态甲基汞(PMeHg)的含量范围分别为7.47~120.11、2.51~43.03、2.28~77.99、0.14~15.14、2.58×10-2~101.62×10-2、0.30×10-2~72.29×10-2、1.45×10-2~63.55×10-2 ng·L-1.在计算各形态汞体积加权平均含量( VWM )的基础上,分别算出其年沉降通量为：42.71、23.51、19.20、5.87、0.61、0.34、0.27μg·( m2·a)-1. MeHg占THg的比例是0.07％~3.79％(平均1.34％),而PHg占THg的比例以及PMeHg占MeHg的比例分别是10.49％~89.30％(平均49.95％)、4.31％~98.86％(平均43.14％).除MeHg外,其它形态汞的含量和沉降量都表现出了明显的季节变化特征,THg、DHg、PHg的含量均为冬季最高而夏季最低,RHg的含量在春冬季明显高于秋夏季. THg、DHg、MeHg、DMeHg的沉降量与降雨量具有相同的季节变化趋势,均为春季﹥夏季﹥秋季﹥冬季,RHg的沉降量也是春季最大,而冬季最小.缙云山大气汞沉降不仅受到降雨量、降雨频率以及其它气象条件的影响,也受到了人为活动的干扰.
于2013年4月至2014年3月連續1 a,利用濕沉降自動採樣器採集瞭重慶縉雲山的雨水樣品,分析瞭樣品中不同形態汞的含量,併計算其沉降量.結果錶明,降水中總汞( THg)、溶解態汞( DHg)、顆粒態汞( PHg)、活性汞( RHg)、總甲基汞(MeHg)、溶解態甲基汞(DMeHg)、顆粒態甲基汞(PMeHg)的含量範圍分彆為7.47~120.11、2.51~43.03、2.28~77.99、0.14~15.14、2.58×10-2~101.62×10-2、0.30×10-2~72.29×10-2、1.45×10-2~63.55×10-2 ng·L-1.在計算各形態汞體積加權平均含量( VWM )的基礎上,分彆算齣其年沉降通量為：42.71、23.51、19.20、5.87、0.61、0.34、0.27μg·( m2·a)-1. MeHg佔THg的比例是0.07％~3.79％(平均1.34％),而PHg佔THg的比例以及PMeHg佔MeHg的比例分彆是10.49％~89.30％(平均49.95％)、4.31％~98.86％(平均43.14％).除MeHg外,其它形態汞的含量和沉降量都錶現齣瞭明顯的季節變化特徵,THg、DHg、PHg的含量均為鼕季最高而夏季最低,RHg的含量在春鼕季明顯高于鞦夏季. THg、DHg、MeHg、DMeHg的沉降量與降雨量具有相同的季節變化趨勢,均為春季﹥夏季﹥鞦季﹥鼕季,RHg的沉降量也是春季最大,而鼕季最小.縉雲山大氣汞沉降不僅受到降雨量、降雨頻率以及其它氣象條件的影響,也受到瞭人為活動的榦擾.
우2013년4월지2014년3월련속1 a,이용습침강자동채양기채집료중경진운산적우수양품,분석료양품중불동형태홍적함량,병계산기침강량.결과표명,강수중총홍( THg)、용해태홍( DHg)、과립태홍( PHg)、활성홍( RHg)、총갑기홍(MeHg)、용해태갑기홍(DMeHg)、과립태갑기홍(PMeHg)적함량범위분별위7.47~120.11、2.51~43.03、2.28~77.99、0.14~15.14、2.58×10-2~101.62×10-2、0.30×10-2~72.29×10-2、1.45×10-2~63.55×10-2 ng·L-1.재계산각형태홍체적가권평균함량( VWM )적기출상,분별산출기년침강통량위：42.71、23.51、19.20、5.87、0.61、0.34、0.27μg·( m2·a)-1. MeHg점THg적비례시0.07％~3.79％(평균1.34％),이PHg점THg적비례이급PMeHg점MeHg적비례분별시10.49％~89.30％(평균49.95％)、4.31％~98.86％(평균43.14％).제MeHg외,기타형태홍적함량화침강량도표현출료명현적계절변화특정,THg、DHg、PHg적함량균위동계최고이하계최저,RHg적함량재춘동계명현고우추하계. THg、DHg、MeHg、DMeHg적침강량여강우량구유상동적계절변화추세,균위춘계﹥하계﹥추계﹥동계,RHg적침강량야시춘계최대,이동계최소.진운산대기홍침강불부수도강우량、강우빈솔이급기타기상조건적영향,야수도료인위활동적간우.
Concentrations of mercury ( Hg) species in precipitation were measured during the period from April 2013 to March 2014 in Jinyun Mountain, Chongqing, and corresponding deposition fluxes were also estimated. The result showed that the ranges of concentration of total mercury ( THg) , dissolved mercury ( DHg) , particulate mercury ( PHg) , reactive mercury ( RHg) , total methyl mercury (MeHg), dissolved methyl mercury (DMeHg), particulate methyl mercury (PMeHg) were 7. 47-120. 11, 2. 51-43. 03, 2. 28-77. 99, 0. 14-15. 14, 2. 58 × 10 -2-101. 62 × 10 -2 , 0. 30 × 10 -2-72. 29 × 10 -2 , and 1. 45 × 10 -2-63. 55 × 10 -2 ng·L-1 , respectively. And their estimated annual deposition fluxes were 42. 71, 23. 51, 19. 20, 5. 87, 0. 61, 0. 34 and 0. 27 μg·(m2·a) -1, respectively. The proportion of MeHg in THg ranged from 0. 07% to 3. 79% with a mean value of 1. 34%, and both PHg and PMeHg in precipitation accounted for approximately 50% of THg ( ranged from 10. 49% to 89. 30%) and TMeHg ( ranged from 4. 31% to 98. 86%) . Obvious seasonal variations of Hg concentrations and deposition fluxes were observed, with the highest VWM levels of THg, DHg and PHg occurring in winter and the lowest value occurring in summer. And the RHg concentrations in precipitation in winter and spring were significantly higher than those found in summer and autumn. The variations of deposition fluxes of THg, DHg, MeHg, DMeHg had a similar seasonal trend with the rainfall, decreasing from spring to summer and to autumn and then to winter. The maximum deposition fluxes of RHg also appeared in spring and the minimum value occurred in winter. The wet deposition of Hg in Jinyun Mountain was influenced by rain amount, rainfall frequency and other meteorological conditions. Hg levels in the precipitation were also affected by human activities.
