Sedimentary phosphorus immobilization with the addition of amended calcium peroxide material

Zhou, Jian; Li, Dapeng; Chen, Shutong; Xu, Yao; Geng, Xue; Guo, Chaoran; Huang, Yong

doi:10.1016/j.cej.2018.09.175

Cited by 45 publications

(2 citation statements)

References 36 publications

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“…Internal P loadings have been reported to be capable of supporting lake eutrophication for several decades without external P loadings. − Therefore, the control of internal P loading is a key to combat lake eutrophication. Thus far, several technologies have been developed to reduce internal P loadings. − With the advantages of easy operation and high efficiency, in situ sediment inactivation is commonly used to control internal P loadings. − Through sediment inactivation, mobile-P can be converted into inert forms, thereby reducing sediment P release. − For example, more than 25% of mobile-P can be transformed into inert-P in the top 4 cm of the sediment layer after sediment inactivation . At present, lanthanum- and/or aluminum-modified clays have been widely used as P inactivation agents in the field. , …”

Section: Introductionmentioning

confidence: 99%

Algal Settlement Inactivates Lanthanum/Aluminum Comodified Attapulgite: Implications for Phosphorus Control in Shallow Lakes

et al. 2022

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Phosphorus (P) inactivation agents have been widely used to control sediment P release for combating lake eutrophication. The settlement and decomposition of algal biomass from the overlying water can alter the microenvironment of the capping layer and potentially affect the performance of P inactivation agents. In this study, we explored the impacts of algal decomposition on the performance of lanthanum/aluminum comodified attapulgite (LAA), a commonly used P inactivation agent, and the underlying mechanisms through incubation experiments. The results showed that algal settlement and decomposition could inactivate LAA. After algal settlement, the amount of P locked in the LAA decreased by 11.8% relative to the control. Algal decomposition induced anoxia in the capping layer of LAA, which favored the growth of phosphate-solubilizing bacteria, thereby enhancing P release; meanwhile, driven by algal decomposition, more organic matter penetrated the capping layer and competed with P adsorption sites. The increased desorption ability and decreased adsorption ability inhibited the performance of LAA, increasing the P permeability of the capping layer. This study provides beneficial information for future field applications of P inactivation agents for lake restoration.

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Section: Introductionmentioning

confidence: 99%

Algal Settlement Inactivates Lanthanum/Aluminum Comodified Attapulgite: Implications for Phosphorus Control in Shallow Lakes

et al. 2022

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“…In-situ repair technology is widely used in engineering because it can avoid large-scale sediment excavation and subsequent treatment (Yin et al 2018;Abel & Akkanen 2019;Lin et al 2019). The solid-phase material capping technology in in-situ repair technology is mostly favored because of its moderate cost and simple operation (Fan et al 2017;Wang et al 2017;Zhou et al 2018;Zhu et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Preparation and application of an innovative integrated agent product for phosphorus control and oxygen release

Zhou

Liu

et al. 2021

Water Supply

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In this study, an oxygen-releasing and phosphorus-controlling agent (ORPC) consisting of calcium peroxide (CaO2), bentonite, cement, stearic acid (SA), citric acid (CA) and fine sand was synthesized successfully and used to purify rich-phosphorus river water. The removal of phosphorus using ORPC was studied in actual river water and the results found that over 75.0% phosphorus was removed by adding ORPC at 30 mL h−1 flow rate in the initial phosphorus concentrations of 0.76 mg L−1. The ORPC was further used to evaluate the changes of aluminum phosphate (Al-P), ferric phosphate (Fe-P) and calcium phosphate (Ca-P) in sediment. Fe-P, Al-P, and Ca-P in the sediment increased from 0.14, 0.196, and 1.63 mg g−1 to 0.159, 0.372, and 2.74 mg g−1 respectively within 28 days, indicating that the total dissolved phosphorus in the overlying water could be adsorbed by ORPC and further transformed into Al-P, Ca-P, and Fe-P in the sediment, thus inhibiting the release of endogenous phosphorus in sediment to water. Besides, the performance of ORPC with various contents of SA and CaO2 was investigated. In summary, ORPC can be employed to adsorb phosphorus in water and prevent phosphorus release from sediment, therefore achieving the purpose of controlling phosphorus and maintaining DO at a reasonable level.

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Using Aeration to Enhance Phosphorus Adsorption and Immobilization by the Sediment and LMB

Song

et al. 2020

Water Air Soil Pollut

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Sedimentary phosphorus immobilization with the addition of amended calcium peroxide material

Cited by 45 publications

References 36 publications

Algal Settlement Inactivates Lanthanum/Aluminum Comodified Attapulgite: Implications for Phosphorus Control in Shallow Lakes

Algal Settlement Inactivates Lanthanum/Aluminum Comodified Attapulgite: Implications for Phosphorus Control in Shallow Lakes

Preparation and application of an innovative integrated agent product for phosphorus control and oxygen release

Using Aeration to Enhance Phosphorus Adsorption and Immobilization by the Sediment and LMB

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