Availability and diffusion kinetic process of phosphorus in the water–sediment interface assessed by the high-resolution DGT technique

薄膜中的扩散梯度 沉积物 扩散 化学 环境化学 环境科学 沉积物-水界面 吸附 分析化学(期刊) 沉积(地质) 动能
作者
Yanwen Zhou,Haixiang Wang,Yinlong Zhang,Yiwei Cai,Hongbin Yin,Zhen Yang,Qiang Li,Hang Yuan
出处
期刊:Journal of Soils and Sediments [Springer Science+Business Media]
卷期号:21 (10): 3274-3288 被引量:4
标识
DOI:10.1007/s11368-021-02954-7
摘要

Desorption of phosphorus (P) bound to iron-containing minerals (Fe-P) is a crucial component of the eutrophication process in lakes. However, the main process and regulation mechanism of iron (Fe) and sulfur (S) on P release is little known because of a lack of in situ high-resolution data. High-resolution measurement evidence is needed to assess the availability and diffusion kinetic process of P at the water–sediment interface. Soluble reactive phosphate (SRP), ferrous ion (Fe2+), and sulfide (S2−) fluxes through the water–sediment interface in a freshwater lake were detected using the novel double-sided diffusive gradients in thin films (DGT) technique. Different P forms in solid sediment were also measured using the sequential extraction procedure. The diffusion fluxes across the water–sediment interface and dynamic diffusion parameters between solid sediment and solution were calculated using the DGT-induced fluxes in sediments and soils (DIFS) model. There was a clear decrease of the SRPDGT, Fe2+DGT, and S2−DGT fluxes from ~5 cm sediment depth to the water–sediment interface. The significant positive correlation between SRPDGT and Fe2+DGT fluxes in the whole profile demonstrates that Fe-P was a vitally important source of labile P in the solution phase. The significant positive fluxes of SRPDGT and Fe2+DGT indicated upward diffusion from the sediment particle toward the overlying water. This process further indicated the desorption and resupply of SRP and Fe2+ from the solid sediment phase and the synergistic effect between these two parameters. In addition, a gentler decline of R curves fitted with the DIFS model was found as the sediment depths increased, which suggesting the continuous resupply process from solid phase to pore water, especially under anaerobic conditions. The novel DGT technique in combination with DIFS analysis confirmed the considerable remobilization and transport capacity of labile P fractions including loosely adsorbed MgCl2-P and reductive Fe-P. These pools can diffuse from sediment particles to the interstitial and the overlying water, and can be further assimilated by organisms in shallow lacustrine ecosystem.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
大模型应助糖果采纳,获得10
刚刚
酷波er应助qianlan采纳,获得10
刚刚
刚刚
催化打工人完成签到,获得积分10
1秒前
MMP完成签到,获得积分10
1秒前
啊娴子发布了新的文献求助30
1秒前
甜美幻桃发布了新的文献求助10
1秒前
balabalabala发布了新的文献求助10
2秒前
2秒前
2秒前
周志轩66完成签到,获得积分20
2秒前
共享精神应助Giner采纳,获得10
2秒前
wendy完成签到,获得积分10
4秒前
霸气映之发布了新的文献求助10
4秒前
潦草发布了新的文献求助10
4秒前
17发布了新的文献求助10
4秒前
5秒前
WW发布了新的文献求助10
6秒前
青儿完成签到,获得积分10
6秒前
Ryan发布了新的文献求助10
7秒前
紧张的语海完成签到,获得积分10
7秒前
研友_LNVX1L发布了新的文献求助10
7秒前
Lucas应助许昊龙采纳,获得10
8秒前
my完成签到,获得积分10
9秒前
9秒前
10秒前
姜勇完成签到,获得积分10
10秒前
10秒前
w11完成签到,获得积分10
10秒前
新晋学术小生完成签到 ,获得积分10
10秒前
10秒前
罐罐儿应助潦草采纳,获得10
11秒前
Adler完成签到,获得积分10
11秒前
痴情的靖柔完成签到 ,获得积分10
11秒前
11秒前
小烟囱完成签到 ,获得积分10
12秒前
12秒前
李爱国应助乔乔采纳,获得10
12秒前
12秒前
Hayat应助night采纳,获得10
12秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969335
求助须知:如何正确求助?哪些是违规求助? 3514162
关于积分的说明 11172430
捐赠科研通 3249456
什么是DOI,文献DOI怎么找? 1794853
邀请新用户注册赠送积分活动 875437
科研通“疑难数据库(出版商)”最低求助积分说明 804809