太原秋季大气PM2.5中糖类物质的组成及来源解析  

Compositions and sources of carbohydrates in PM2.5 in September of Taiyuan

作　　者：史乃金 高博 郭送军 刘明 卢清 何秋生[3] 赵伟 黄绪 张智胜 陶俊 陈来国 SHI Naijin;GAO Bo;GUO Songjun;LIU Ming;LU Qing;HE Qiusheng;ZHAO Wei;HUANG Xu;ZHANG Zhisheng;TAO Jun;CHEN Laiguo(School of Resources,Environment and Materials,Guangxi University,Nanning 530004;State Environmental Protection Key Laboratory of Urban Environment&Ecology,South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510655;School of Environment and Safety,Taiyuan University of Science and Technology,Taiyuan 030024)

机构地区：[1]广西大学资源环境与材料学院,南宁530004 [2]生态环境部华南环境科学研究所,国家环境保护城市生态环境模拟与保护重点实验室,广州510655 [3]太原科技大学环境与安全学院,太原030024

出　　处：《环境科学学报》2020年第1期83-89,共7页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金面上项目(No.41573123,41773130,41773127)

摘　　要：糖类物质是一类重要的生物标志物,可用于大气颗粒物的来源识别.采用高效阴离子交换色谱-脉冲安培检测法(HPAEC-PAD)于2018年秋季对山西太原PM2.5中的糖类物质进行定量分析.结果表明,此次检测共检出8种糖类物质,包括4种糖醇(肌醇、赤藓糖醇、阿拉伯糖醇、甘露糖醇)、3种脱水糖(左旋葡聚糖、甘露聚糖、半乳聚糖)和1种单糖(葡萄糖).3种脱水糖总浓度明显大于其他糖类,且与PM2.5之间呈显著相关性(r=0.74、0.59、0.99),表明生物质燃烧对太原地区PM2.5有明显贡献.应用正定矩阵因子分解模型(PMF5.0)进行源解析发现,太原秋季(9月)PM2.5中的糖类物质主要来源于生物质燃烧、花粉和植物碎屑、真菌孢子和土壤灰尘4类.同时应用特征分子比值并结合太原地区农业生产情况识别出太原市的生物质燃烧源主要为硬木和作物残渣的混合贡献.Sugars are important bio-markers for source identification of atmospheric particulates.High-efficiency anion exchange chromatography-pulse amperometric detection(HPAEC-PAD)was used to quantitatively analyze the composition of carbohydrates in PM2.5 during September in Taiyuan.Eight sugar substances were measured,including 4 sugar alcohols(i.e.inositol,erythritol,arabitol and mannitol),3 anhydrosugars(i.e.levoglucosan,mannosan and galactosan)and 1 monosaccharide(glucose).The concentrations of anhydrosugars were significantly higher than those of other sugar concentrations and were well correlated with PM2.5 mass levels(r=0.74,0.59 and 0.99,respectively).In addition,source analysis by PMF5.0 model showed that PM2.5-borne sugars in Taiyuan were mainly from biomass burning,pollen and plant debris,fungal spores and soil dust.According to characteristic molecular ratios together with the local agriculture production situations,the mixture of hardwood and crop residues were concluded as the main biomass combustion sources in Taiyuan.

关 键 词：太原 秋季 糖类物质 PM2.5 生物质燃烧 

分 类 号：X51[环境科学与工程—环境工程]