广州某工业区大气中PCDD/Fs含量水平及其季节性变化特征  被引量:3

Seasonal Variation of Concentrations and Distribution Characteristics of PCDD/Fs in Atmosphere of an Industrial Area,Guangzhou

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作  者:青宪[1] 苏原[2] 苏青[3] 张素坤[1] 任明忠[1] 

机构地区:[1]环境保护部华南环境科学研究所,广州510655 [2]西南石油大学化学与化工学院,成都610500 [3]湖南师范大学资源与环境科学学院,长沙410012

出  处:《环境科学》2014年第2期464-469,共6页Environmental Science

基  金:环境保护公益性行业科研专项(2011467001;200909095-2)

摘  要:通过对广州某工业区大气中2,3,7,8-PCDD/Fs的季节性监测,并对大气中PCDD/Fs的浓度与季节性变化进行了分析.结果表明,该工业区大气中PCDD/Fs的浓度范围为2.33~75.4Pg·m-3,平均值为23.2Pg·m-3,毒性当量浓度I-TEQ范围为0.229-10.7Pg·m-3,平均值为2.00Pg·m-3,高于日本环境空气质量标准推荐年均值0.6Pg·m-3.该工业区PCDD/Fs浓度季节性变化明显,最高的季节为春季(37.8Pg·m-3),浓度最低的季节为夏季(13.5Pg·m。),其次为秋季(22.3Pg·m-3)和冬季(19.1Pg·m-3);毒性当量浓度变化高低顺序为:春季(5.58Pg·m。)〉夏季(1.06Pg·m-3)〉秋季(0.839Pg·m-3)〉冬季(0.525Pg·m-3).降雨、季风的季节性变化可能是引起大气中PCDD/Fs浓度季节性变化的原因.Atmospheric concentrations of 2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were measured seasonally in an industrial area of Guangzhou City. And seasonal variation of eoneentrations and distribution characteristics of 2,3,7,8- PCDD/Fs was investigated. The PCDD/Fs concentrations and corresponding I-TEQ (toxic equivalent quantity) values were in the range of 2. 33-75.4 pg·m-3 (mean =23.2 pg·m-3) and 0.229-10.7 pg·m-3 (mean =2.00 pg·m-3), respectively. The seasonal variation of PCDD/Fs concentrations was obvious, with the highest concentration was found in spring (37.8 pg·m-3) and the lowest in summer (13.5 pg· m-3). However, no obvious difference of concentrations was observed for autumn (22. 3 pg·m-3) and winter ( 19. 1 pg·m-3 ). The seasonal variation of I-TEQ values is as follows: spring (5.58 pg·m -3 ) 〉 summer ( 1.06 pg·m-3 ) 〉 autumn (0. 839 pg·m-3) 〉 winter (0. 525 pg·m-3 ). The influences of monsoon and rainfall on the concentration of PCDD/Fs in atmosphere are discussed.

关 键 词:环境空气 工业区 季节性变化 二噁英(PCDD/Fs) 分布特征 

分 类 号:X131.1[环境科学与工程—环境科学] X51

 

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