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引用本文:孙小静,张战平,朱广伟,秦伯强.太湖水体中胶体磷含量初探.湖泊科学,2006,18(3):231-237. DOI:10.18307/2006.0306
SUN Xiaojing,ZHANG Zhanping,ZHU Guangwei,QIN Boqiang.Content of colloidal phosphorus in water of Lake Taihu, China. J. Lake Sci.2006,18(3):231-237. DOI:10.18307/2006.0306
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太湖水体中胶体磷含量初探
孙小静1,2, 张战平3, 朱广伟1, 秦伯强1
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.中国科学院研究生院, 北京 100039;3.浙江大学环境与资源学院, 杭州 310028
摘要:
为了探明太湖水体中胶体磷含量,更深入认识营养盐在大型浅水湖泊中的循环过程和机理,分别从太湖的梅梁湾和贡湖湾两个不同类型的湖区采集水样,利用切向流超滤方法分离出胶体物质,对太湖水体中胶体磷含量进行了初步研究.结果表明:太湖水体春季胶体磷含量在0.017-0.029mg/L间,其中梅梁湾藻型湖区胶体磷含量范围是0023-0.029mg/L,贡湖湾草型湖区胶体磷含量在0.017-0.022mg/L间.梅梁湾水体胶体磷占总磷比例平均为28.6%;而贡湖湾胶体磷占总磷比例平均达到39.3%.梅梁湾水体真溶解态磷含量显著高于贡湖湾水体,达贡湖湾的4倍.与澳大利亚的17个湖泊相比,太湖属胶体磷含量偏低的湖泊,但相对于海洋的研究结果,太湖胶体磷含量明显偏高.
关键词:  胶体    切向流超滤  太湖  浅水湖泊
DOI:10.18307/2006.0306
分类号:
基金项目:国家自然科学基金项目(40203007);中国科学院知识创新工程重大项目(KZCX1-SW-12);国家“十五”重大科技专项(863计划)(2002AA601011)共同资助
Content of colloidal phosphorus in water of Lake Taihu, China
SUN Xiaojing1,2, ZHANG Zhanping3, ZHU Guangwei1, QIN Boqiang1
1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China;3.College of Environmental and Resource Sciences, Zhejiang University,Hangzhou 310028, P. R. China
Abstract:
Concentration of colloidal phosphorus in Lake Taihu, China, was determined in this paper. Lake water was sampled in April, 2005. Cross-flow filtration technique was applied to extract colloid from the water. The result shows that colloidal phosphorus concentration in Lake Taihu varied from 0.017 to 0.029 mg/L. In Meiliang Bay, an algae type zone, it is 0.023-0.029 mg/L; while in Gonghu Bay, a grass type zone, it is 0.017-0.022 mg/L. The colloidal phosphorus account for 28.6% of total phosphorus (TP) in Meiliang Bay, and account for 39.3% of total phosphorus (TP) in Gonghu Bay, respectively. The true-dissolved phosphorus in Meiliang Bay is four times of that in Gonghu Bay.
Key words:  Colloid  phosphorus  cross-flow ultrafiltration  Lake Taihu  shallow lake
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