太湖五里湖表层沉积物中不同形态磷的分布特征
DISTRIBUTION CHARACTERISTICS OF DIFFERENT FORMS OF PHOSPHORUS IN SURFICIAL SEDIMENTS FROM WULI,TAIHU LAKE,CHINA
查看参考文献32篇
|
文摘
|
利用连续提取法(SEDEX)详细调查了太湖五里湖表层沉积物中不同形态磷的组成和分布特征.结果显示:其中磷的含量较高,受人为污染输入的影响较大,并且已经有了一定的释放.总磷的变化范围为2.05～4.05 mg/g,平均约为2.80 mg/g.总磷主要由无机磷组成(70%～90%),大多数无机磷为CDB溶液提取的铁结合态磷(75%～85%).CDB溶液的n(Fe)/n(P)都较小(2.0～5.3),说明CDB溶液提取的铁主要是以无定形态存在的,并且铁与磷酸盐之间的吸附可能已经达到了平衡状态.除底部个别样品以外,多数样品n(Corg)/n(Norg)较小(8.8～10.6),所有样品的n(Corg)/n(Porg)都较大(135～320),表明沉积物在早期成岩作用过程中,湖泊内源自生有机质降解时有机磷优先释放.无机磷,特别是铁结合态磷,在氧化还原条件变化的情况下,能够通过沉积物-水体界面被再次释放到水体中去,这可能对湖泊的水体质量和营养状况有一定的影响. |
|
其他语种文摘
|
In order to investigate the cycling and burial of phosphorus in Taihu Lake, the SEDEX method, a sequential extraction method for separating different forms of phosphorus was used in measuring phosphorus in surficial sediments. The sediments were sequentially extracted for loosely bound + exchangeable P, Fe-bound P, authigenic + biogenic + CaCOj-boundP, and detrital apatite + other inorganic P, and non-sequential total P and inorganic P, where the difference between total and inorganic P was assumed to be organic P. The results suggest the anthropogenic inputs can have very high impact on nutrients of the lake, and the release of phosphorus could have occurred in surface sediments. The concentrations of total P are very high in dry sediments, with an average value of ~ 2.80 mg/g, and a variation between 4.02 mg/g and 2.05 mg/g. Total P is composed mainly of inorganic P (70% - 90%), and most of inorganic phosphorus (75% - 85%) is the CDB-extractable iron oxide phase. The low Fe/P atomic ratios (2.0-5.3) indicate that the Fe compounds extracted with CDB have a lower proportion of relatively crystalline phases in all samples, and the absorption between iron and phosphorus could have apparently reached certain equilibrium. Except few bottom samples, organic C/N atomic ratios are lower (8.8 - 10.6), suggesting a lacustrine authigenic source of organic matter in the sediments. Moreover, organic C/P atomic ratios in all samples are usually higher than those of the particles of lacustrine living organisms (100: 1), which indicate that the organic phosphorus had been preferentially released via organic matter degradation during the early diagenesis process. Fe-bound phosphorus can be removed through the sediment-water interface by a variety of the redox conditions in the sediments, which could be have a distinct impact on water quality and trophic condition of the lake. |
|
来源
|
矿物学报
,2004,24(4):405-410 【核心库】
|
|
关键词
|
连续提取
;
磷形态
;
沉积物
;
太湖
|
|
地址
|
中国科学院,地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-4734 |
|
学科
|
环境科学基础理论 |
|
基金
|
中国科学院知识创新工程项目
;
中国科学院知识创新工程项目
;
国家973计划
|
|
文献收藏号
|
CSCD:1797559
|
参考文献 共
32
共2页
|
|
1.
Vollenweider R A. Scientific Fundamentals of the Eutrophication of Lake and Flowing Waters.
Scientific Fundamentals of the Eutrophication of Lake and Flowing Waters, with Particular Reference to Nitrogen and Phosphorus as Factors in Eutrophication,1968
|
CSCD被引
1
次
|
|
|
|
|
2.
Frink C R. Rational analysis of eutrophication in a connecticut lake [J].
Envir Sci Technol,1967,1:425-428
|
CSCD被引
10
次
|
|
|
|
|
3.
Garber K J. Internal phosphorus loading to shallow Edinbro Lake in northwestern Pennsylvania [J].
Hydrobiologia,1985,122(1):45-52
|
CSCD被引
17
次
|
|
|
|
|
4.
Emsley J. The phosphorus Cycle [A].
Natural and Biogeochemical Cycles,1980
|
CSCD被引
1
次
|
|
|
|
|
5.
Gunnars A. The role of iron and manganese [J].
Chem Commun,1990,4:51
|
CSCD被引
3
次
|
|
|
|
|
6.
Davison W. Iron and manganese in lakes [J].
Earth Sci Rev,1993,34:119-163
|
CSCD被引
35
次
|
|
|
|
|
7.
F llmi K B. The phosphorus cycle.
Earth Sci Rev,1996,40:55-124
|
CSCD被引
2
次
|
|
|
|
|
8.
蔡启铭. 前言[A].
太湖环境生态研究,1998
|
CSCD被引
7
次
|
|
|
|
|
9.
廖文根. 太湖水体中的磷负荷分析[J].
水利学报,1994,11:77-81
|
CSCD被引
4
次
|
|
|
|
|
10.
王晓蓉. 环境条件变化对太湖沉积物磷释放的影响.
环境化学,1996,15(1):15-19
|
CSCD被引
78
次
|
|
|
|
|
11.
李文朝. 东太湖表层沉积物的磷饱和度初步研究.
湖泊科学,1998,10(3):49-54
|
CSCD被引
10
次
|
|
|
|
|
12.
范成新. 太湖底泥及其间隙水中氮磷垂直分布及相互关系分析.
湖泊科学,2000,12(4):359-366
|
CSCD被引
113
次
|
|
|
|
|
13.
张路. 模拟扰动条件下太湖表层沉积物磷行为的研究.
湖泊科学,2001,13(1):35-42
|
CSCD被引
70
次
|
|
|
|
|
14.
袁旭音. 太湖北部底泥中氮、磷的空间变化和环境意义[J].
地球化学,2002,31(4):321-328
|
CSCD被引
35
次
|
|
|
|
|
15.
Ruttenberg K C. Development of a sequential extraction method for different forms of phosphorus in marine sediments [J].
Limnol Oceanogr,1992,37:1460-1482
|
CSCD被引
211
次
|
|
|
|
|
16.
Aspila K I. A semiautomated method for the determination of inorganic.
Aanlyst,1976,101:187-197
|
CSCD被引
72
次
|
|
|
|
|
17.
Koroleff F. Determination of nutrient [A].
Methods of Seawater Analysis,1976
|
CSCD被引
1
次
|
|
|
|
|
18.
Schelske C L. Recent changes in productivity and climate of Lake Ontario detected by isotopic analysis of sediments [J].
Limnol Oceanogr,1991,36:961-975
|
CSCD被引
20
次
|
|
|
|
|
19.
Wu F C. Geochemical processes of iron and manganese in a seasonally stratified lake affected by coal-mining drainage in China [J].
Limnol,2001,2:55-62
|
CSCD被引
2
次
|
|
|
|
|
20.
Bostrm B. Phosphorus release from lake sediments [J].
Arch Hydrobiol Beih Ergebn Limnol,1982,18:5-59
|
CSCD被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问