Inhibition of phosphorus release from sediment-water interface in eutrophic waters using oxygen-loaded porous materials

LIU Ming; QIU Zile; LU Yang; WANG Ruxue; BAI Lanfeng; XIONG Shuangshuang; SHI Li; DOU Pengpeng

doi:10.13205/j.hjgc.202606010

Volume 44 Issue 6

Jun. 2026

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LIU Ming, QIU Zile, LU Yang, WANG Ruxue, BAI Lanfeng, XIONG Shuangshuang, SHI Li, DOU Pengpeng. Inhibition of phosphorus release from sediment-water interface in eutrophic waters using oxygen-loaded porous materials[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 92-100. doi: 10.13205/j.hjgc.202606010

Citation:

LIU Ming, QIU Zile, LU Yang, WANG Ruxue, BAI Lanfeng, XIONG Shuangshuang, SHI Li, DOU Pengpeng. Inhibition of phosphorus release from sediment-water interface in eutrophic waters using oxygen-loaded porous materials[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 92-100. doi: 10.13205/j.hjgc.202606010

Citation:

LIU Ming, QIU Zile, LU Yang, WANG Ruxue, BAI Lanfeng, XIONG Shuangshuang, SHI Li, DOU Pengpeng. Inhibition of phosphorus release from sediment-water interface in eutrophic waters using oxygen-loaded porous materials[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(6): 92-100. doi: 10.13205/j.hjgc.202606010

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Inhibition of phosphorus release from sediment-water interface in eutrophic waters using oxygen-loaded porous materials

doi: 10.13205/j.hjgc.202606010

1. School of Resources and Environment, Moutai Institute, Zunyi 564500, China;
2. Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China;
3. College of Environment and Ecology, Chongqing University, Chongqing 400044, China

Received Date: 2026-01-20
Accepted Date: 2026-02-27
Rev Recd Date: 2026-02-15

Available Online: 2026-07-06

Abstract

Abstract

Dissolved oxygen （DO） is crucial in controlling the migration of endogenous phosphorus in eutrophic waters. Current oxygenation technologies face issues such as high energy consumption and disturbance of sediments. Therefore， there is an urgent need to explore low-disturbance， pH-stable oxygenation strategies that do not introduce additional nitrogen and phosphorus loads， as well as their mechanisms for phosphorus inhibition. In this study， laboratory microcosm experiments were conducted using natural samples from eutrophic waters， DO microprofiles across the sediment-water interface were determined using microelectrodes， while diffusive gradients in thin films （DGT） were used to characterize the concentrations and spatial distributions of Fe， S， and P at the interface. In addition， a sequential extraction procedure was employed to quantify changes in different phosphorus fractions in the sediment. The results showed that after covering with the oxygen-loaded porous material， the DO concentration in the surface sediment increased by 6.58 times， the DO penetration depth increased by 1.33 times， the total phosphorus （TP） concentration in the overlying water decreased by 93.79%， and the phosphate （PO^3-₄-P） in the sediment interstitial water decreased by up to 45.75%. The sediment-water interface TP exchange flux changed from 0.0068 mg/（m²·d） to -0.014 mg/（m²·d）， shifting from a phosphorus source to a phosphorus sink. In the sediments， the stable phosphorus form （Res-P） increased by 5.22%， while the labile phosphorus form （NaHCO₃-P） decreased by 4.48%. Consequently， through coupling of redox-sensitive elements iron and sulfur， the immobilization of phosphorus in sediments was enhanced， reducing the release of endogenous phosphorus. The oxygen-loaded porous material inhibited phosphorus release from sediments by regulating interfacial dissolved oxygen， providing a theoretical basis for the scientific study of endogenous phosphorus control in eutrophic waters without altering pH conditions.
- oxygen-loaded porous material,
- sediment-water interface,
- endogenous pollution,
- phosphorus,
- dissolved oxygen

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References(42)

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