Prераrаtiоn оf Lаnthаnum Сrоsslinkеd Саlсium Pеrоxidе/Sерiоlitе/Sоdium Аlginаtе Соmроsitе Hуdrоgеls аnd Thеir Eliminаtiоn Pеrfоrmаnсе fоr Endоgеnоus Phоsрhоrus

被引：0
|
作者：
Qu S.-T. [1 ,2 ]
Shan S.-J. [1 ,2 ]
Wang C.-M. [1 ,2 ]
Wu L.-Y. [1 ,2 ]
Li D.-P. [1 ,2 ]
Huang Y. [1 ,2 ]
机构：
[1] School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou
[2] Environment Biotechnology Research Institute, Suzhou University of Science and Technology, Suzhou
来源：
Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 04期
关键词：
calcium peroxide; eutrophication control; lanthanum; phosphate; slow-release hydrogels; sodium alginate（SA）;
D O I：
10.13227/j.hjkx.202303132
中图分类号：
学科分类号：
摘要：
CPS60@SA/La composites were developed through sodium alginate coating and lanthanum ion crosslinking using nano-calcium peroxide-loaded sepiolite as the basic skeleton. Then，their phosphorus removal performance and mechanisms in eutrophic water bodies were investigated through batch adsorption experiments and characterization analyses. The results showed that as-prepared composites had good oxygen release and phosphorus removal ability，and nano-calcium peroxide and lanthanum sites were recognized as the main active components. With the increase in the CPS60@SA/La hydrogel dosage，the phosphorus removal efficiencies increased accordingly. The removal process of CPS60@SA/La for high-concentration phosphorus followed the description of the pseudo-second-order kinetic model and Langmuir isotherm model，with a maximum adsorption capacity of 198. 25 mg·g-1（20℃）. The as-prepared CPS60@SA/La exhibited good phosphate removal performance in the pH range of 3-9，and the coexistence of F-，HCO3-，CO32-，and HA had a slight inhibition effect on the phosphorus removal by CPS60@SA/La. In the actual river water，CPS60@SA/La composites could slowly release oxygen and maintain the concentration of dissolved oxygen of approximately 8. 51 mg·L-1，which could provide good conditions for the aerobic microorganisms at the sediment-water interface，with good removal and inactivation ability for phosphate in both overlying and pore water，and their removal performance was stable. Thus，its use is expected to enhance the self-purification ability of surface water bodies. © 2024 Science Press. All rights reserved.
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页码：2160 / 2170
页数：10
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