广州市不同功能区大气二英含量和分布特征研究  

The distribution characteristics of PCDD/Fs in the atmosphere at different areas of Guangzhou City

作　　者：苏青[1,2] 任明忠[2] 张素坤[2] 万大娟[1] 青宪[2] 宁慧平[2] 

机构地区：[1]湖南师范大学资源与环境科学学院,长沙410081 [2]环境保护部华南环境科学研究所,广州510655

出　　处：《环境科学学报》2012年第11期2704-2711,共8页Acta Scientiae Circumstantiae

基　　金：公益性行业科研专项(No.200909095B)~~

摘　　要：应用气相色谱-高分辨率质谱仪(GC-HRMS)对广州市秋冬季6个区域环境空气样品中的17种2,3,7,8-氯代二英含量进行了检测.结果表明,广州市各观测区域大气中二英毒性当量浓度范围为0.151～2.230pg.m-3,均值为0.418pg.m-3.各观测区域空气中二英毒性当量浓度分布存在一定的差异,本研究的背景区、居民住宅区和商业区二英毒性当量浓度较低且水平相近,分别为(0.294±0.099)、(0.305±0.115)、(0.308±0.102)pg.m-3.交通枢纽区、郊区和工业区二英毒性当量浓度相对较高,分别为(0.342±0.049)、(0.423±0.113)和(0.838±0.704)pg·m-3.广州市不同功能区二英毒性当量浓度呈现背景区<住宅区<商业区<交通枢纽区<郊区<工业区的分布特点.与2004年相比,广州市城区二英毒性当量浓度有所下降,郊区毒性当量浓度有所上升.In this research, seventeen kinds of atmospheric PCDD/Fs components sampled from six regions of Guangzhou City in autumn were determined using GC/HRMS. The results demonstrated that the toxic equivalent （TEQ） of PCDD/Fs were in the range of O. 151 to 2. 230 pg·m^-3 anti an average value was 0. 418 pg·m^-3. Moreover, the levels of atmospheric PCDD/Fs components were associated with regional environment. The results verified that the lower and similar TEQ of PCDD/Fs were （0. 294 ±0.099） , （0. 305 ±0. 115） and （0. 308 ±0. 102） pg·m^-3 in the background, residential area and commercial district, respectively. Meanwhile, the TEQ levels in transport hub area, suburban and industrial areas were higher with the values as （0. 342 ± 0. 049 ） , （0. 423 ± 0.113 ） and （0. 838 ± 0. 704 ） pg·m^-3, respectively. Furthermore, TEQ distribution trend in functional urban regions of Guangzhou City ranked as background 〈 residential area 〈 commercial district 〈 transport hub area 〈 suburban 〈 industrial district. Additionally, compared with that of 2004, the average TEQ in 2011 decreased in urban area and increased in suburban area.

关 键 词：广州市 环境空气 二英 含量分布 

分 类 号：X51[环境科学与工程—环境工程]