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学科主题: Environmental Sciences
题名: CONTAMINATION ASSESSMENT AND POTENTIAL MOBILITY OF SEDIMENT PHOSPHORUS FROM DIANCHI LAKE, CHINA
作者: Chang, Fengyi1, 2; Pan, Xiaojie3, 4; Li, Yanhui1, 2; Li, Dunhai1; Li, Genbao1; Liu, Yongding1
通讯作者: Liu, YD, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, 7 S Donghu Rd, Wuhan 430072, Hubei Province, Peoples R China
关键词: Phosphorus ; Phosphorus fractions ; Dianchi Lake ; Sediments ; Sequential extraction ; Eutrophication
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2010
卷: 19, 期:1, 页:42-49
收录类别: SCI
文章类型: Article
部门归属: [Chang, Fengyi; Li, Yanhui; Li, Dunhai; Li, Genbao; Liu, Yongding] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China; [Chang, Fengyi; Li, Yanhui] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Pan, Xiaojie] Chinese Acad Sci, Wuhan 430079, Peoples R China; [Pan, Xiaojie] Minist Water Resources, Inst Hydroecol, Wuhan 430079, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Basic Research Programs of China [2008CB418002]; Project of Chinese Academy of Sciences [KZCX1-YW-14-1, KZCX2-YW-426]
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Dianchi Lake has been hyper-eutrophicated in the last decades, which is caused directly by the phosphorus loading. In order to understand the relationship between sediment phosphorus and eutrophication in the lake, we investigated the water and sediment samples in twelve cores, and evaluated the phosphorus release potential of five phosphorus fractions with a sequential extraction scheme. The results suggested that total sediment phosphorus in Dianchi Lake varied greatly. The concentration tended to decrease from north to south cores in horizontal and with the depth in vertical. The maximum concentration of total phosphorus was 4.15 mg/g dry weight, and was observed in the upper 5 cm of site S1. For sediment fractions of Dianchi Lake, metallic oxide-phosphorus was maximum phosphorus species and had high potential release risk to act as internal phosphorus sink. Correlation analysis showed that both reactive ferric-Fe bound phosphorus and metallic oxide-phosphorus in sediment were positively related to TP concentration of overlying water. In addition, a positive correlation was also observed between the sediment metallic oxide-phosphorus and chlorophyll a concentration in overlaying water. The effect of sediment characteristics on phosphorus fractions represented that reactive ferric-Fe bound phosphorus of sediment decreased with the decrease of oxidation-reduction potential, and residual-phosphorus increased with the increase of organic matter.
英文摘要: Dianchi Lake has been hyper-eutrophicated in the last decades, which is caused directly by the phosphorus loading. In order to understand the relationship between sediment phosphorus and eutrophication in the lake, we investigated the water and sediment samples in twelve cores, and evaluated the phosphorus release potential of five phosphorus fractions with a sequential extraction scheme. The results suggested that total sediment phosphorus in Dianchi Lake varied greatly. The concentration tended to decrease from north to south cores in horizontal and with the depth in vertical. The maximum concentration of total phosphorus was 4.15 mg/g dry weight, and was observed in the upper 5 cm of site S1. For sediment fractions of Dianchi Lake, metallic oxide-phosphorus was maximum phosphorus species and had high potential release risk to act as internal phosphorus sink. Correlation analysis showed that both reactive ferric-Fe bound phosphorus and metallic oxide-phosphorus in sediment were positively related to TP concentration of overlying water. In addition, a positive correlation was also observed between the sediment metallic oxide-phosphorus and chlorophyll a concentration in overlaying water. The effect of sediment characteristics on phosphorus fractions represented that reactive ferric-Fe bound phosphorus of sediment decreased with the decrease of oxidation-reduction potential, and residual-phosphorus increased with the increase of organic matter.
关键词[WOS]: SOIL-PHOSPHORUS ; RELEASE ; WATER ; FRACTIONS ; PHOSPHATE ; NITROGEN ; IRON ; PH
语种: 英语
WOS记录号: WOS:000274402900006
ISSN号: 1018-4619
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/13727
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Wuhan 430079, Peoples R China
4.Minist Water Resources, Inst Hydroecol, Wuhan 430079, Peoples R China

Recommended Citation:
Chang, Fengyi; Pan, Xiaojie; Li, Yanhui; Li, Dunhai; Li, Genbao; Liu, Yongding.CONTAMINATION ASSESSMENT AND POTENTIAL MOBILITY OF SEDIMENT PHOSPHORUS FROM DIANCHI LAKE, CHINA,FRESENIUS ENVIRONMENTAL BULLETIN,2010,19(1):42-49
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