应用地质累积指数评价抚顺市PM10中元素的污染

2006-2007年采暖季、风沙季和非采暖季分别在抚顺市的6个采样点采集PM10样品,用等离子体原子发射光谱(ICP-AES)法测定样品中Ti、Al、Mn、Mg、Ca、Na、K、Cu、Zn、As、Pb、Cr、Ni、Co、Cd、Fe、V等17种元素的含量,并用地质累积指数对其污染状况进行初步评价。结果表明:(1)从PM10中元素在不同采样点的含量看,抚顺市PM10中Ti、Mn、Mg、Cu、Zn、Pb、Cr、Ni、Co这9种元素在各采样点间的差别较大;Al、Ca、Na、K、As、Cd、Fe、V这8种元素差别较小。(2)从PM10中元素在不同采样季的含量看,抚顺市PM10中Mn、Mg含量的季间差别较大,其余15种元素季间差别较小。(3)Zn、Cd污染较重;Ti、Al、Mg、Ca、Na、K、As、Fe和V污染较轻;其他6种元素在6个采样点和3个采样季污染程度差别较大。(4)水库采样点各元素污染级别均不是最高;新华采样点PM10中Cu、Zn、Pb、Cr、Ni、Co、Cd污染级别均较高。(5)3个采样季PM10中Cd、Zn污染均较重,属于重度或严重污染;在采暖季PM10中Cu、Pb、Cr的地质累积指数较风沙季、非采暖季大;在非采暖季PM10中Mn、Co受到的污染比采暖季和风沙季稍严重。

Applying the geoaccumulation index to evaluate element pollution of PM10 in Fushun

PM10 samples were collected at six sites in heating season,windy season and non-heating season from 2006 to 2007 in Fushun.The concentrations of 17 elements(Ti,Al,Mn,Mg,Ca,Na,K,Cu,Zn,As,Pb,Cr,Ni,Co,Cd,Fe,V) in the samples were determined by ICP-AES technique.Then the geoaccumulation index was applied to assess the pollution level.The evaluation results were as follows:(1) by contrast with the concentrations of 17 elements in the six sampling sites,the concentrations of 9 elements(Ti,Mn,Mg,Cu,Zn,Pb,Cr,Ni and Co) in PM10 among six sampling sites were obviously different and there was no significant difference of the other 8 elements(Al,Ca,Na,K,As,Cd,Fe and V).(2) Comparing the concentrations of 17 elements in the three sampling seasons,the concentrations of Mn,Mg elements in PM10 among sampling seasons were remarkablely different,and the difference of remaining 15 elements were insignificant.(3) The more seriously polluted elements were Zn and Cd.And the pollution levels of Ti,Al,Mg,Ca,Na,K,As,Fe and V were slight.In addition,the difference of pollution levels of the other 6 elements among six sampling sites and three sampling seasons were obvious.(4) The pollution level of each element in Shuiku sampling site was not the highest;the pollution levels of Cu,Zn,Pb,Cr,Ni,Co and Cd in Xinhua sampling site were relatively higher.(5) The pollution of Cd and Zn in three sampling seasons was heavy,and their pollution degree can be classified as heavy or serious pollution.The values of geoaccumulation index for Cu,Pb and Cr elements in heating season were bigger than those in the other seasons.The contaminations of Mn and Co elements in non-heating season were heavier than those in the other seasons.