PANHao-qi,ZHANGYa-qian,LONG Yue-sheng,et al.Effect of Calcium Carbonate/Kaolinite Composite on Phosphorus Composition Released from Sediment[J].China Water & Wastewater,2022,38(9):100-105.
Effect of Calcium Carbonate/Kaolinite Composite on Phosphorus Composition Released from Sediment
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第9期
Page:
100-105
Column:
Date of publication:
2022-05-01
- Keywords:
- calcium carbonate/kaolinite composite; sediment; phosphorus release; phosphorus composition
- Abstract:
- To solve the problem of endogenous phosphorus release in eutrophic rivers, a novel phosphorus load control material,namely kaolinite composite loaded with calcium carbonate (CLK)particles, was synthesized and its effect on phosphorus composition released from the sediment was investigated. CLK effectively inhibited phosphorus release from the sediment. The optimal dosage of CLK was 100 mg/g, and the concentration of soluble phosphorus in water was controlled at 0.021 mg/L within 2 h. The addition of CLK promoted the conversion of interchangeable phosphorus (Ex-P), aluminum-bound phosphorus (Al-P) and iron-bound phosphorus (Fe-P) to calcium-bound phosphorus (Ca-P) in the sediment. Among them, the content of Fe-P decreased by 17.31%, and the content of Ca-P increased by 27.91%, which effectively reduced the risk of phosphorus release from the sediment.
Last Update:
2022-05-01