GYIG OpenIR  > 环境地球化学国家重点实验室
The oxygen isotopic composition of phosphate as an effective tracer for phosphate sources in Hongfeng Lake
Yongxue Ji;  Jingan Chen;  Runyu Zhang;  Yong Liu;  Jingfu Wang
2017
发表期刊Acta Geochimica
卷号36期号:4页码:619-625
摘要

In order to characterize the oxygen isotopic composition of internal phosphate and explore the possibility of using these data to identify phosphate sources, we measured oxygen isotopic compositions of phosphate (delta~(18)O_p) in sediment pore water in Hongfeng Lake,a typical deep-water lake in a mountainous area. These data, in combination with delta~(18)O_p in surface water samples and water column samples,were successfully used to identify phosphate sources. The delta~(18)O_p value of sediment pore water ranged from 15.2 to 15.8, with an average value of 15.5-the delta~(18)O_p value of internal phosphate. The delta~(18)O_p values decreased gradually through the water column from 19.4%o in surface water to 16.4 in deeper water,implying that internal phosphate had more negative delta~(18)O_p values than external phosphate. This finding was substantiated by horizontal variations in delta~(18)O_P values, which decreased with increasing distance from inflowing rivers. All collected evidence suggests that external and internal phosphate have distinctly different isotopic signatures and that these signatures have not been considerably altered by biological mediation in Hongfeng Lake. Therefore, delta~(18)O_P can be used to distinguish phosphate sources. A two-endmember mixing model showed that internal phosphate had an average contribution of 40%,highlighting the influence of internal phosphorus loading on aqueous phosphate and eutrophication. This study illustrates the need to reduce the internal phosphorus load from sediment and provides guidance for nutrient management and in-lake restoration treatment in Hongfeng Lake. The data presented here are limited, but serve to highlight the great potential of delta~(18)O_p as an effective tracer for identifying phosphate sources. Systematic investigations of the oxygen isotopic compositions of external phosphate,internal phosphate,and phosphate through the water column,in combination with in-lake P biogeochemical cycle study,would be desirable in further research.

关键词Phosphate Source Delta~(18)O_p Eutrophication Hongfeng Lake
收录类别EI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/7710
专题环境地球化学国家重点实验室
作者单位1.Institute of Geochemistry, Chinese Academy of Sciences, State Key Laboratory of Environmental Geochemistry, Guiyang, Guizhou 550081, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
第一作者单位中国科学院地球化学研究所
通讯作者单位中国科学院地球化学研究所
推荐引用方式
GB/T 7714
Yongxue Ji;Jingan Chen;Runyu Zhang;Yong Liu;Jingfu Wang. The oxygen isotopic composition of phosphate as an effective tracer for phosphate sources in Hongfeng Lake[J]. Acta Geochimica,2017,36(4):619-625.
APA Yongxue Ji;Jingan Chen;Runyu Zhang;Yong Liu;Jingfu Wang.(2017).The oxygen isotopic composition of phosphate as an effective tracer for phosphate sources in Hongfeng Lake.Acta Geochimica,36(4),619-625.
MLA Yongxue Ji;Jingan Chen;Runyu Zhang;Yong Liu;Jingfu Wang."The oxygen isotopic composition of phosphate as an effective tracer for phosphate sources in Hongfeng Lake".Acta Geochimica 36.4(2017):619-625.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
The oxygen isotopic (1082KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Yongxue Ji;Jingan Chen;Runyu Zhang;Yong Liu;Jingfu Wang]的文章
百度学术
百度学术中相似的文章
[Yongxue Ji;Jingan Chen;Runyu Zhang;Yong Liu;Jingfu Wang]的文章
必应学术
必应学术中相似的文章
[Yongxue Ji;Jingan Chen;Runyu Zhang;Yong Liu;Jingfu Wang]的文章
相关权益政策
暂无数据
收藏/分享
文件名: The oxygen isotopic composition of phosphate as an effective tracer for phosphate sources in Hongfeng Lake.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。