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红树植物落叶碎屑对海水中多环芳烃的吸附作用

陆志强1,2;郑文教3;马丽4   

  1. 1集美大学水产学院, 福建厦门 361021;2集美大学福建省高校水产科学技术与食品安全重点实验室, 福建厦门 361021; 3厦门大学生命科学学院 福建厦门 361005;4国家海洋局第三海洋研究所, 福建厦门 361005
  • 收稿日期:2007-08-13 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10

Adsorption of polycyclic aromatic hydrocarbons in seawater by mangrove leaf litter.

LU Zhi-qiang1,2;ZHENG Wen-jiao3;MA Li4   

  1. 1Fisheries College of Jimei University, Xiamen 361021, Fujian, China;2Key Laboratory of Science and Technology for Aquaculture and Food Safety, Xiamen 361021, Fujian, China; 3School of Life Sciences, Xiamen University, Xiamen 361005, Fujian, China; 4Third Institute of Oceanography of the State Oceanic Administration, Xiamen 361005, Fujian, China
  • Received:2007-08-13 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10

摘要: 在实验室条件下,研究了海水中多环芳烃(PAHs)(含低分子量PAHs苊、菲和屈以及高分子量PAHs苯并[g,h,i]芘)浓度分别为40、400和4 000 μg·L-1时,红树植物秋茄(Kandelia candel)和白骨壤(Avicennia marina)不同分解状态落叶碎屑对PAHs的吸附作用。结果显示:在同等PAHs浓度下,秋茄和白骨壤落叶碎屑对4种PAHs的吸附总量相近,树种间或分解状态间的吸附差异不显著;随着PAHs浓度的增加,2种红树植物落叶碎屑对4种PAHs的吸附率均呈现逐渐增加的趋势;PAHs浓度较低时,落叶碎屑对屈和菲有较高的吸附率或选择性吸附,PAHs浓度较高时,落叶碎屑对苯并[g,h,i]芘吸附率提高。上述结果表明,不同分解状态下的红树植物落叶碎屑对海水中PAHs均有较强吸附能力,及时清除落叶碎屑,是去除海水中PAHs的有效途径之一。

关键词: 小麦, 根系活力, 旗叶, 衰老

Abstract: Under laboratory conditions, this paper studied the adsorption of different concentration (40, 400 and 4 000 μg·L-1) polycyclic aromatic hydrocarbons (PAHs) including low molecular weight acenaphthylene, phenathrene and chrysene and high molecular weight benzo[g,h,i]perylene in seawater by the leaf litters of Kandelia candel and Avicennia marina at different decomposition status. The results showed that at the same concentrations, the total amount of test PAHs adsorbed by the K. candel and A. marinaleaf litters had no significant difference, in spite of their decomposition status. The adsorbed amount of the PAHs tended to increase with their increasing concentrations. The litters had a higher adsorption rate of or exhibited selective adsorption to phenathrene and chrysene when the PAHs concentrations were lower, and had a higher adsorption rate of benzo[g,h,i]perylene when the PAHs concentrations were higher. These results indicated that mangrove leaf litter at different decomposition status had higher adsorption rates of PAHs in seawater. It is suggested that cleaning up the mangrove leaf litter in time could be one of the most effective ways to remove PAHs from seawater.

Key words: Wheat, Root activity, Flag leaf, Senescence