红树植物落叶碎屑对海水中多环芳烃的吸附作用

红树植物落叶碎屑对海水中多环芳烃的吸附作用

3

陆志强1,2

　郑文教

333

　马　丽

4

(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)

摘　要　在实验室条件下,研究了海水中多环芳烃(P AH s )(含低分子量P AH s 苊、菲和艹屈

以及高分子量P AH s 苯并[g,h,i]芘)浓度分别为40、400和4000μg ・L -1

时,红树植物秋茄(Kandelia candel )和白骨壤(A vicennia m arina )不同分解状态落叶碎屑对P AH s 的吸附作用。结果显示:在同等P AH s 浓度下,秋茄和白骨壤落叶碎屑对4种P AH s 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P AH s 浓度的增加,2种红树植物落叶碎屑对4种P AH s 的吸附率均呈现逐渐增加的趋势;P AH s 浓度较低时,落叶碎屑对艹屈和菲有较高的吸附率或选择性吸附,P AH s 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P AH s 均有较强吸附能力,及时清除落叶碎屑,是去除海水中P AH s 的有效途径之一。关键词　红树植物;落叶碎屑;多环芳烃;吸附中图分类号　X171　文献标识码　A 文章编号　1000-4890(2008)05-0858-04Adsorpti on of polycycli c aro ma ti c hydrocarbon s i n seawa ter by mangrove leaf litter 1LU

Zhi 2qiang 1,2,ZHENG W en 2jiao 3,MA L i 4(1

F isheries College of J i m ei U niversity,X iam en

361021,Fujian,China;2

Key L aboratory of Science and Technology for A quaculture and Food

Safety,X iam en 361021,Fujian,Ch ina;3

School of L ife S ciences,X iam en U n iversity,X iam en

361005,Fujian,China;4

Third Institute of O ceanography of the S tate O ceanic A dm inistration,X iam en 361005,Fu jian,Ch ina ).Ch inese Journal of Ecology ,2008,27(5):858-861.

Abstract:Under laborat ory conditi ons,this paper studied the ads or p ti on of different concentra 2

ti on (40,400and 4000μg ・L -1

)polycyclic ar omatic hydr ocarbons (P AH s )including l ow mo 2lecular weight acenaphthylene,phenathrene and chrysene and high molecular weight benz o[g,h,i ]perylene in sea water by the leaf litters of Kandelia candel and A vicennia m a rina at different de 2compositi on status .The results showed that at the sa me concentrati ons,the t otal a mount of test P AH s ads orbed by the K .candel and A.m arina leaf litters had no significant difference,in s p ite of their decompositi on status .The ads orbed a mount of the P AH s tended t o increase with their in 2creasing concentrati ons .The litters had a higher ads or p ti on rate of or exhibited selective ads or p 2ti on t o phenathrene and chrysene when the P AH s concentrati ons were l ower,and had a higher ads or p ti on rate of benz o [g,h,i ]perylene when the P AH s concentrati ons were higher .These re 2sults indicated that mangr ove leaf litter at different decompositi on status had higher ads or p ti on rates of P AH s in sea water .It is suggested that cleaning up the mangr ove leaf litter in ti m e could be one of the most effective ways t o re move P AH s fr om sea water .Key words:mangr ove;leaf litter;polycyclic ar omatic hydr ocarbons;ads or p ti on .

3福建省自然科学基金(D0710025)和国家海洋局青年海洋科学基金计划资助项目(2004103)。33通讯作者E 2mail:zheng wenjiao2008@sina 收稿日期:2007208213 接受日期:2007212221

红树林生长在热带、亚热带陆海交汇的海湾河

口区,是海岸河口生态系统重要的初级生产者(林

鹏,1997)。落叶分解形成有机碎屑是红树林湿地高生产力的重要原因之一,也为河口区异养生物提供了丰富的食物源(林鹏和陈荣华,1991;W afar et

a l .,1997)。同时,红树林湿地高初级生产力、富含

有机碎屑和有机碳等特征使其大量吸收和蓄积有机

生态学杂志Chinese Journal of Ecol ogy 2008,27(5):858-861