摘要
于2006年至2007年在台州电子垃圾拆解区和市区对照点采集了不同季节的大气细颗粒物样品,利用离子色谱对颗粒物中氯离子(Cl-)、硝酸根(NO3-)、硫酸根(SO42-)、草酸根(C2O42-)、钠离子(Na+)、铵离子(NH4+)、钾离子(K+)、钙离子(Ca2+)、镁离子(Mg2+)等水溶性离子进行了分析.结果表明,电子垃圾拆解区大气细颗粒物中离子总浓度在夏季、秋季和冬季采样期间分别为16.85μg.m-3、48.76μg.m-3和64.24μg.m-3,是PM2.5质量浓度的主要组成部分,其中NO3-、SO42-和NH4+占离子总浓度的80%左右.Na+、Ca2+和Mg2+主要存在于粗颗粒物中,而其它离子主要存在于细颗粒物中.电子垃圾拆解区PM2.5中存在高浓度的氯离子,塑料焚烧可能是其主要来源.
PM2.5 samples were collected in the E-waste dismantling area and at the reference urban site in Taizhou in 2006 and 2007.Ionic species including chloride（Cl^-）,nitrate（NO-3）,sulfate（SO2-4）,oxalate（C2O2-4）,sodium（Na^＋）,ammonium（NH＋4）,potassium（K^＋）,calcium（Ca^2＋） and magnesium（Mg^2＋） were analyzed by ion chromatography.Results showed that the total concentration of these ions in the E-waste dismantling area was 16.85 μg·m^-38.76 μg·m^-3nd 64.24 μg·m^-3n summer,autumn and winter sampling periods.Nitrate,sulfate and ammonium accounted for about 80% of the total ions.Na^＋,Ca^2＋ and Mg^2＋ existed mainly in coarse particles,while other ions mainly in fine particles.High concentrations of chloride were detected in PM2.5 from the E-waste dismantling area.Combustion of plastics is most likely the main source of the particulate chloride in the E-waste dismantling area.
出处
《环境化学》
CAS
CSCD
北大核心
2011年第3期693-697,共5页
Environmental Chemistry
基金
国家自然科学基金(20877052)
上海市教委优秀青年教师专项资助
