本文選題：大氣沉降 + 重金屬��； 參考：《中國環(huán)境科學(xué)》2017年11期

【摘要】：通過中國知網(wǎng)、ISI Web of Science、萬方、維普和Google scholar數(shù)據(jù)庫,檢索1995~2015年公開發(fā)表的關(guān)于我國大氣重金屬元素沉降的文獻(xiàn),分析研究我國大氣干、濕沉降中重金屬元素含量特征及時(shí)空變化,大氣重金屬沉降通量特征及時(shí)空變化.文獻(xiàn)數(shù)據(jù)統(tǒng)計(jì)分析結(jié)果表明:近20年來我國大氣降塵中Cu、Zn、Pb、Cr、Cd、As、Ni、Hg的均值或中位值含量均超過GB15618-1995《土壤環(huán)境質(zhì)量標(biāo)準(zhǔn)》中的一級(jí)標(biāo)準(zhǔn)值,超標(biāo)倍數(shù)分別為3.0、7.4、7.9、1.1、16.5、1.5、1.2、2.3倍;我國大氣降水中Pb、Hg含量的均值或中位值超過我國地表水Ⅰ類水質(zhì)標(biāo)準(zhǔn);與1995~2005年相比,2006~2015年我國大氣降塵中Pb、Cr、Cd、As、Mn、Ni均值或中位值含量降低了32%~50%;我國南方大氣降塵中Cu、Zn、Pb、Cr、Cd、Ni和Hg的平均含量較北方高出60.9%、44.2%、137.5%、34.2%、68.0%、7.3%和25.0%,而As和Mn則低于北方;我國大氣干濕沉降中Cu、Zn、Pb、Cr、Cd、As、Mn、Ni、Hg的年沉降通量均值或中位值分別為(10.99±14.74),(78.87±313.23),(21.81±64.53),(10.38±48.10),(0.37±1.84),(2.54±3.85),(48.00±193.40),(4.79±13.56),(0.04±0.16)mg/(m2·a);與1995~2005年相比,2006~2015年我國大氣干濕沉降中Cu、Zn、Pb、Cr、Mn的沉降通量均值或中位值分別高出了11.6%、37.3%、39.1%、95.9%、117.6%,As、Ni、Hg的沉降通量均值或中位值分別降低了41.0%、21.8%、50.0%;我國北方Cu、Zn、Cr、As、Mn、Ni的沉降通量均值或中位值較南方高出42.6%、16.3%、96.8%、130.5%、307.1%、124.2%,而南方的Pb、Cd沉降通量均值或中位值高出北方22.9%、30.3%.在控制土壤重金屬大氣干濕沉降污染源時(shí)應(yīng)優(yōu)先針對(duì)Cd、Pb、Hg采取措施.
[Abstract]:Based on the Web of Science, Wanfang, Weip and Google scholar databases of China, this paper searched the literature published from 1995 to 2015 on the deposition of heavy metal elements in the atmosphere of China, and analyzed and studied the characteristics and temporal and spatial changes of heavy metal elements in dry and wet deposition of the atmosphere in China. Characteristics of atmospheric heavy metal deposition fluxes and temporal and spatial variations. The results of statistical analysis of literature data show that the average or median values of CuOZnPbPbCU / CrPbPbC / CrPbCU / NII / Hg in recent 20 years are higher than those of the first class standard of GB15618-1995 (soil Environmental quality Standard), and the ratio of exceeding the standard is 3. 0 / 7. 4 / 7. 9 / 1 / 1 / 16.51.52 / 2 / 2. 3 times, respectively. The average or median value of PBG Hg content in the precipitation of China is higher than the water quality standard of class I of surface water in China. Compared with that from 1995 to 2005, the average value or median value of PbCrCrCrCrcdcdcdcdcdcdcdcnmnmnnn in atmospheric dust fall in our country decreased by 320.500.The average contents of CuOZnPbPbPbPbPbCrncncdncdcdcncdcdcdcncdcncdcncdcncncn and Hg in the south of China were higher than those in the north by 60.99.2137.5C and 25.0%, while the contents of as and mn were lower than those in the north. 鎴戝浗澶ф皵騫叉箍娌夐檷涓瑿u,Zn,Pb,Cr,Cd,As,Mn,Ni,Hg鐨勫勾娌夐檷閫氶噺鍧囧，

本文編號(hào)：1878127