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| 大石围天坑群地下河沉积物中PAHs的污染特征 | |
| 引用本文： | 孔祥胜,祁士华,OramahIT,黄保健,张原.大石围天坑群地下河沉积物中PAHs的污染特征[J].环境科学与技术,2011,34(8):42-48,159. |
| 作者姓名： | 孔祥胜 祁士华 OramahIT 黄保健 张原 |
| 作者单位： | 1. 中国地质大学(武汉)教育部生物地质和环境地质重点实验室,湖北武汉430074;中国地质科学院岩溶地质研究所,广西桂林541004;中国地质科学院岩溶生态系统与石漠化治理重点开放实验室,广西桂林541004 2. 中国地质大学(武汉)教育部生物地质和环境地质重点实验室,湖北武汉,430074 3. 中国地质科学院岩溶地质研究所,广西桂林,541004 |
| 基金项目： | 中国地质科学院岩溶地质研究所所控项目(200720) |
| 摘 要： | 为探索喀斯特地下河沉积物中多环芳烃(PAHs)的污染特征、来源,研究选择典型的广西乐业大石围天坑群地下河进行,沿途采集7个断面的沉积物样品,利用气相色谱-质谱(GC-MS)对16种优控PAHs进行定量分析.结果表明,大石围天坑群地下河上层沉积物中总PAHs浓度为37.75～1 662.72 ng/g,下层沉积物为43.... |
| 关 键 词： | 多环芳烃 大石围天坑群 地下河 沉积物 喀斯特 污染特征 |
Contaminant and Sources of Polycyclic Aromatic Hydrocarbons in Sediments from Bailang Underground River in Karst Area,Guangxi |
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| KONG Xiang-sheng,QI Shi-hua,OramahIT,HUANG Bao-jian,ZHANG Yuan.Contaminant and Sources of Polycyclic Aromatic Hydrocarbons in Sediments from Bailang Underground River in Karst Area,Guangxi[J].Environmental Science and Technology,2011,34(8):42-48,159. | |
| Authors: | KONG Xiang-sheng QI Shi-hua OramahIT HUANG Bao-jian ZHANG Yuan |
| Institution: | KONG Xiang-sheng1,2,3,QI Shi-hua1,Oramah IT1,HUANG Bao-jian2,ZHANG Yuan1(1.Key Laboratory of Biogeology and Environmental Geology of Ministry of Education,China University of Geosciences,Wuhan 430074,China,2.Institute of Karst Geology,Chinese Academy of Geological Science,Guilin 541004,3.Key Openning Laboratory of Rock Ecosystem and Desertilizing Control,China University of Geoseiences,China) |
| Abstract: | In order to understand the contaminant and source of polycyclic aromatic hydrocarbons(PAHs) in sediments of Bailang Underground River in typical karst area,sediment samples were collected from 7 sections,and then 16 priority polycyclic aromatic hydrocarbons were analyzed using GC-MS.Results showed that the concentration of total PAHs in upper layer sediments ranged from 37.75 ng/g～1,662.72 ng/g,while that of underlayer sediments ranged from 43.46 ng/g～1,220.79 ng/g.Concentration of PAHs did not obviously change between the upper layer and the underlayer.Predominant PAHs in sediments of the entrance were 4～6 rings,while that of outlet were 2～3 rings.Comparison with other areas in the world,concentrations of PAHs in sediments from Bailang Underground River was lower.The study discovered that underground river rises consumingly purification function to sewage because of sedimentation and adsorption.Analysis of pollution sources indicated county area is both petrogenic and pyrogenic sources,while village areas are grass and wood and fuel coal combustion sources.Comparison of component profiles of PAHs between soil in Tiankeng and sediment in underground river discovered that cool trap effect of karst Tiankeng along underground river plays an important role to input sediment for PAHs,so that concentration of PAHs in sediment of Dashiwei Tiankeng increased by 106%.The ecological risk assessment showed that concentrations of PAHs in sediments tend to be a range of low risk. |
| Keywords: | polycyclic aromatic hydrocarbons(PAHs) Dashiwei Tiankeng group Bailang Underground River sediment karst ecological risk |
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