辽河支流条子河中多环芳烃和有机氯农药的时空分布及来源解析.doc

  辽河支流条子河中多环芳烃和有机氯农药 的时空分布及来源解析#  苏禹龙  1,2,3  1,2,3  1,2,3  1,2,3  1,2,3  1,2,3** 5 10 15 20 25 30 35 40 （1. 地下水资源与环境教育部重点实验室，长春 130012； 2. 水资源与水环境吉林省重点实验室，长春 130012； 3. 吉林大学环境与资源学院，长春 130012） 摘要：本研究沿辽河支流条子河布设 3 个采样断面，分别于春汛期、丰水期、平水期和枯水 期采集水样及表层沉积物样品，分析样品中 16 种多环芳烃（PAHs）和 8 种有机氯农药的含 量，并对这两类污染物在该区域的时空分布及来源进行分析。结果表明，条子河水中∑PAHs 浓度为 658.1~3096.6ng/L，均值（算术平均值，下同）为 1522.1ng/L；沉积物中∑PAHs 含 量为 775.7~2835.4ng/g，均值为 1374.0ng/g。条子河水和沉积物中均仅检出α、β和γ- 六六六（HCHs），滴滴涕（DDTs）均未检出。河水中∑HCHs 浓度为 5.36~16.57ng/L，均值 为 10.93ng/L；沉积物中∑HCHs 含量为 2.87~5.56ng/g，均值为 4.34ng/g。条子河水和沉积 物中的 PAHs 具有相似的时空分布特征，即 PAHs 浓度均为自上游至下游递减且枯水期平水 期春汛期丰水期。而河水和沉积物中的 HCHs 在时空分布方面呈现相反特征：水中 HCHs 浓度自上游至下游递增且丰水期春汛期平水期枯水期，沉积物中 HCHs 浓度自上游至下游 递减且枯水期平水期春汛期丰水期。PAHs 和 HCHs 的源解析表明：条子河中的 PAHs 主要 来自煤炭燃烧源和交通燃烧源，HCHs 主要来自历史上农药林丹的使用，近期没有新输入源。 关键词：环境科学；条子河；多环芳烃；有机氯农药；时空分布；源解析 中图分类号：X522 Temporospatial distribution and source identification of polycyclic aromatic hydrocarbons and organochlorine pesticides in Tiaozi River, a branch of Liaohe River Su Yulong1,2,3, Xu Xiaomeng1,2,3, Guo Zhiyong1,2,3, Liang Dapeng1,2,3, Hua Xiuyi1,2,3, Dong Deming1,2,3 (1. Key Lab of Groundwater Resources and Environment of Ministry of Education,Changchun 130012; 2. Key Lab of Water Resources and Aquatic Environment of Jilin Province,Changchun 130012; 3. College of Environment and Resources, Jilin University, Changchun 130012) Abstract: Water and surface sediment samples were collected from the Tiaozi River, a branch of Liaohe River, in spring, summer, autumn and winter. 16 primary polycyclic aromatic hydrocarbons (PAHs) and 8 typical organochlorine pesticides in these samples were determined by a GC-MS analyzer. In addition, the distribution and source of the organic pollutants were identified. Results indicated that the total PAHs levels in the water samples were 658.1~3096.6ng/L (arithmetic mean: 1522.1ng/L) and in the sediments were 775.7~2835.4ng/g (1374.0ng/g). α, β and γ-HCH were detected out in all the samples and the total HCHs were 5.36~