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澳门南湾湖钻孔沉积物中自由态和束缚态的多环芳烃
引用本文:郝永梅,李春雷,罗孝俊,麦碧娴,盛国英,傅家谟. 澳门南湾湖钻孔沉积物中自由态和束缚态的多环芳烃[J]. 环境科学, 2006, 27(2): 235-240
作者姓名:郝永梅  李春雷  罗孝俊  麦碧娴  盛国英  傅家谟
作者单位:上海市水产研究所,上海市水产品质量监督检验站,上海,200433;中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州,510640;复旦大学环境科学与工程系,上海,200433;中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州,510640
基金项目:中国科学院知识创新工程项目(KZCX3-SW-121);国家重点基础研究发展规划(973)项目(2003CB415002);国家自然科学基金项目(40272129);广东省自然科学基金项目(010504)
摘    要:研究自然条件下沉积物中有机污染物沉积后的环境行为,考察澳门南湾湖钻孔沉积物中自由态和束缚态PAHs的含量与分布.研究表明,自由态PAHs以4-环、6,7-环和5-环为主,其质量百分贡献分别为28.7%~40.6%、17.6%~29.6%和13.2%~28.2%;而束缚态PAHs则以4-环、3-环和2-环为主,质量百分贡献分别为42.3%~55.8%、20.2%~35.8%和7.8%~18.8%.说明低分子量PAHs比高分子量PAHs更容易进入沉积有机质的孔隙中.自由态PAHs的垂直分布特征受区域经济发展及环境治理进程的影响,束缚态PAHs的含量一方面受控于PAHs的输入量,另一方面与沉积有机质的结构(特别是聚合程度)有关,随着沉积埋藏时间的延长有利于各化合物从自由态向束缚态转变.

关 键 词:钻孔沉积物  多环芳烃  自由态与束缚态  澳门
文章编号:0250-3301(2006)02-0235-06
收稿时间:2005-01-28
修稿时间:2005-01-282005-03-18

Free and Bound PAHs in a Sediment Core from Nam Van Artificial Lake of Macao
HAO Yong-mei,LI Chun-lei,LUO Xiao-jun,MAI Bi-xian,SHENG Guo-ying and FU Jia-mo. Free and Bound PAHs in a Sediment Core from Nam Van Artificial Lake of Macao[J]. Chinese Journal of Environmental Science, 2006, 27(2): 235-240
Authors:HAO Yong-mei  LI Chun-lei  LUO Xiao-jun  MAI Bi-xian  SHENG Guo-ying  FU Jia-mo
Affiliation:Shanghai Fisheries Research Institute, Shanghai Testing & Supervising Station on Aquatic Products Quality, Shanghai 200433, China.
Abstract:To study the posts-depositional behaviors of organic pollutants in natural conditions, concentrations and distributions of free and bound PAHs in a sediment core from Nam Van artificial Lake of Macao were investigated. Result indicate that free PAHs are predominated by 4-ring, 6,7-ring, and 5-ring PAHs, with the mass percentages of 28.7% to approximately 40.6%, 17.6% to approximately 29.6%, and 13.2% to approximately 28.2%, respectively, and for bound PAHs, the main components are 4-ring, 3-ring, and 2-ring ones, with mass percentages 42.3% to approximately 55.8%, 20.2% to approximately 35.8%, and 7.8% to approximately 18.8%, respectively, which suggeste that PAHs with low molecular weight are more prone to entering the micro-pores of sediment organic matters. Vertical profile of free PAHs concentrations in sediment core, to some degree, is correlated with the degree of regional economy development and the proceeding of environmental management. The concentrations of bound PAHs in the sediment core are controlled by the total PAHs mass input to the sediments and the structure (especially the polymerization) of sediment organic mater. The sediment burying favors the transformation of free form to bound form for PAH compounds.
Keywords:sediment core  PAHs  free and bound  Macao
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