文章摘要
李 斌,解启来,刘昕宇,汤嘉骏.流溪河水体多环芳烃的污染特征及其对淡水生物的生态风险[J].农业环境科学学报,2014,33(2):367-374.
流溪河水体多环芳烃的污染特征及其对淡水生物的生态风险
Pollution and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons by Species Sensitivity Distributions in the Liuxi River, South China
  
DOI:10.11654/jaes.2014.02.023
中文关键词: 多环芳烃  物种敏感性分布  淡水生物  生态风险评价  流溪河
英文关键词: polycyclic aromatic hydrocarbons  species sensitivity distributions  freshwater organisms  ecological risk assessment  Liuxi River
基金项目:
作者单位
李 斌 华南农业大学资源环境学院 广州 510642土壤环境与废物资源农业利用广东高校重点实验室 广州 510642 
解启来 华南农业大学资源环境学院 广州 510642土壤环境与废物资源农业利用广东高校重点实验室 广州 510642 
刘昕宇 华南农业大学资源环境学院 广州 510642土壤环境与废物资源农业利用广东高校重点实验室 广州 510642珠江流域水环境监测中心 广州 510611 
汤嘉骏 华南农业大学资源环境学院 广州 510642土壤环境与废物资源农业利用广东高校重点实验室 广州 510642 
摘要点击次数: 2660
全文下载次数: 2298
中文摘要:
      利用自动固相萃取-气相色谱/质谱技术,研究广州市流溪河流域18个采样点水体中16种优控PAHs的污染水平、组成特征,并进行生态风险评估。结果表明,水体中PAHs总量在107.5~672.0 ng·L-1之间,平均含量为185.9 ng·L-1;就组成特征而言,水体中PAHs以2环(23.4%)、3环(51.8%)和4环(15.2%)为主;与国内外其他河流水体相比,∑PAHs含量水平处于较低水平。通过构建8种常见PAHs对淡水生物的物种敏感性分布曲线,计算出8种PAHs对不同淡水生物的5%危害浓度(HC5)及其预测无效应浓度(PNEC);进而分析了8种PAHs的生态风险,并对比脊椎动物和无脊椎动物对8种PAHs的敏感性差异。通过评估流溪河水体中PAHs的联合生态风险,8种PAHs对所有物种的生态风险大小依次为苯并[a]芘>蒽>荧蒽>菲>萘>芘>芴>苊;而且8种PAHs对无脊椎动物的毒性与生态风险明显高于脊椎动物。与其他水体相比,流溪河水体中PAHs确实存在一定的生态风险,但尚较低。
英文摘要:
      Assessment of polycyclic aromatic hydrocarbons(PAHs) in water is critical to water quality. In this study, 16 priority PAHs in water samples(n=18) collected from the Liuxi River, a drinking water source of Guangzhou city, were measured using automatic solid-phase extraction and gas chromatography-mass spectrometer(GC-MS). Their ecological risks to aquatic organisms were evaluated by Species Sensitivity Distributions(SSD). Total concentrations of 16 PAHs ranged from 107.5 ng·L-1 to 672.0 ng·L-1, with a mean value of 185.9 ng·L-1, which was lower than those reported for other river waters in both China and other countries. The PAHs in the water samples were dominated by 3-ring(51.8%), followed by 2-ring(23.4%) and 4-ring(15.2%) components. The ecological risk of PAHs to all species decreased in order of benzo(a) pyrene>anthracene>fluoranthene>phenanthrene>naphthalene>pyrene>fluorene>acenaphthene. The toxicities and ecological risks of PAHs were significantly higher to invertebrates than to vertebrates. However, the risk quotient values of PAHs to all speices were below 0.5, suggesting relatively low risks of PAHs in the water of Liuxi River .
HTML    查看全文   查看/发表评论  下载PDF阅读器