Fluidization characteristics and application of powdered La adsorbent for phosphorus removal

WU Yukai; WANG Zuobei; YANG Jie; CHEN Minquan; LIU Shuyan; CHEN Jinglin; CHEN Shaohua; WANG Wei; YE Xin

doi:10.13205/j.hjgc.202507015

Volume 43 Issue 7

Jul. 2025

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WU Yukai, WANG Zuobei, YANG Jie, CHEN Minquan, LIU Shuyan, CHEN Jinglin, CHEN Shaohua, WANG Wei, YE Xin. Fluidization characteristics and application of powdered La adsorbent for phosphorus removal[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(7): 134-144. doi: 10.13205/j.hjgc.202507015

Citation:

WU Yukai, WANG Zuobei, YANG Jie, CHEN Minquan, LIU Shuyan, CHEN Jinglin, CHEN Shaohua, WANG Wei, YE Xin. Fluidization characteristics and application of powdered La adsorbent for phosphorus removal[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(7): 134-144. doi: 10.13205/j.hjgc.202507015

Citation:

WU Yukai, WANG Zuobei, YANG Jie, CHEN Minquan, LIU Shuyan, CHEN Jinglin, CHEN Shaohua, WANG Wei, YE Xin. Fluidization characteristics and application of powdered La adsorbent for phosphorus removal[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(7): 134-144. doi: 10.13205/j.hjgc.202507015

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Fluidization characteristics and application of powdered La adsorbent for phosphorus removal

doi: 10.13205/j.hjgc.202507015

1. School of Environmental and Safety Engineering, Fuzhou University, Fuzhou 350108, China;
2. State Key Laboratory of Advanced Environmental Technology, Institute of Urban Environment, CAS, Xiamen 361021, China;
3. Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, CAS, Fuzhou 350002, China;
4. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350117, China

Received Date: 2024-05-20
Accepted Date: 2024-08-02
Rev Recd Date: 2024-06-22

Available Online: 2025-09-11

Abstract

Abstract

Adsorption is a prominent and highly effective method for managing wastewater that contains phosphorus：a nutrient that can cause eutrophication in water bodies. This process is particularly advantageous due to its high efficiency and the fact that it does not generate sludge， which is a common byproduct of other wastewater treatment methods. However， the use of powdered adsorbents，though often the most effective for phosphorus removal，poses challenges in traditional fixed-bed reactors. These challenges include flow interruptions， blockages， and the risk of reactor collapse due to the pressure exerted by the bed， all of which can significantly degrade the adsorbent's adsorption efficiency and the process's operational stability. In light of these issues， this study proposed a shift from fixed-bed adsorption to fluidized-bed adsorption as a potential solution. The fluidized-bed approach was investigated for its feasibility as a phosphorus adsorption reactor， using La₂（CO₃）₃-diatomite composites （La₂（CO₃）₃@Dia） as the adsorbent. The fluidization characteristics of this powdered adsorbent were scrutinized in a fluidized-bed setup， with key parameters such as the minimum fluidization velocity and terminal velocity being measured. These parameters are crucial for understanding the adsorbent’s behavior in the fluidized bed and optimizing reactor design. To derive a suitable fluidization parameter equation for the powdered adsorbent， the Ergun formula was employed—a widely accepted model for predicting the pressure drop across a packed bed， and by extension， the behavior of fluidized beds. The study further examined the effects of upward flow velocity on both phosphorus removal efficiency and adsorbent loss. It was found that maintaining the micro-fluidized bed diameter above 10 mm was beneficial， as it minimized the impact of wall friction on the measurement of the powdered adsorbent's fluidization parameters. The study derived optimal prediction formulas for both the minimum fluidization velocity and terminal velocity of powdered adsorbents， based on Ergun's coefficient correction formula and Planowski's universal formula， respectively. The experimental results of the fluidized adsorption experiments are promising： by controlling the upward flow velocity between the minimum fluidization velocity and the extraction velocity， the La₂（CO₃）₃@Dia composites achieved an average saturated adsorption capacity of 79.4% of their maximum capacity. Furthermore， the average adsorbent loss rate was measured at 11.3%， representing a significant improvement over fixed-bed reactor limitations. In conclusion， this study provides preliminary evidence supporting the use of fluidized beds as phosphorus adsorption reactors. It offers valuable theoretical guidance and empirical data to advance the practical implementation of powdered adsorbent absorption processes. By addressing the challenges associated with powdered adsorbents in fixed-bed reactors， this research contributes to the development of more efficient and stable wastewater treatment technologies that can help mitigate the environmental impacts of phosphorus pollution.
- fluidized-bed adsorption,
- powdered adsorbent,
- minimum fluidization velocity,
- terminal velocity,
- equation fitting

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References(35)

References

[1]	LIU B,GAI S,LAN Y,et al. Metal-based adsorbents for water eutrophication remediation:A review of performances and mechanisms[J]. Environmental Research,2022,212(Part B):113353.
[2]	WANG C,XU B F. Methods and technological advances in phosphorus removal from wastewater[J]. Low Temperature Architecture Technology,2016,38(8):37-38.王迟,徐冰峰.污水除磷的方法以及技术进展[J].低温建筑技术,2016,38(8):37-38.
[3]	GIZAW A,ZEWGE F,KUMAR A,et al. A comprehensive review on nitrate and phosphate removal and recovery from aqueous solutions by adsorption[J]. AQUA:Water Infrastructure,Ecosystems and Society,2021,70(7):921-947.
[4]	ZHU F Y,CAKMAK E K,CETECIOGLU Z. Phosphorus recovery for circular economy:application potential of feasible resources and engineering processes in Europe[J]. Chemical Engineering Journal,2023,454:140153.
[5]	ERGUN S,ORNING A A. Fluid flow through randomly packed columns and fluidized beds[J]. Industrial and Engineering Chemistry,1949,41(6):1179-1184.
[6]	ZHANG M Z,LIU Z,ZHANG L Q,et al. Effect of activated coke diameter on SO₂ adsorption in fixed-bed and entrained-flow reactors[J]. Huadian Technology,2020,42(10):22-27.张梦泽,刘志,张立强,等.粒径对活性焦固定床和气流床吸附SO₂过程的影响[J].华电技术,2020,42(10):22-27.
[7]	ZHANG Y,PAN B,SHAN C,et al. Enhanced phosphate removal by nanosized hydrated La (III) oxide confined in cross-linked polystyrene networks[J]. Environmental Science&Technology,2016,50(3):1447-1454.
[8]	YANG J L,ZHANG Y A,MA S H,et al. Effect of different particle sizes of modified fly ash on phosphate adsorption performance[J]. The Chinese Journal of Process Engineering,2020,20(11):1281-1288.杨建林,张宇鳌,马淑花,等.不同粒径改性粉煤灰对磷酸根吸附性能的影响[J].过程工程学报,2020,20(11):1281-1288.
[9]	LIU Z X. Estimation of surface velocity limits in fluidized beds[J]. Pharmaceutical Design,1980(6):33-34.李仲先.流化床中表面速度界限的估计[J].医药设计,1980(6):33-34.
[10]	LIU A Z,ZHANG W Y,LI H Y,et al. Experimental study on particle characteristics of liquid-solid fluidized bed[J]. China Powder Science and Technology,2021,27(3):43-49.刘阿珍,张卫义,李汉勇,等.液-固流化床颗粒流态化特性实验研究[J].中国粉体技术,2021,27(3):43-49.
[11]	YAO D,LIU M Y,LI X N. Residence time distributions of liquid phase in gas-liquid-solid mini-fluidized bed[J]. CIESC Journal,2018,69(11):4754-4762.姚东,刘明言,李翔南.小型气-液-固流化床液相的停留时间分布[J].化工学报,2018,69(11):4754-4762.
[12]	QIE Z P,ALHASSAWI H,SUN F,et al. Characteristics and applications of micro fluidized beds (MFBs)[J]. Chemical Engineering Journal,2022,428:131330.
[13]	YANG J,CHEN J L,LI R N,et al. Facile synthesis of La₂(CO₃)3-diatomite composites for the continuous removal of low-concentration phosphate[J]. International Journal of Environmental Science and Technology,2022,53:1-14.
[14]	NI C J. Density measurement of substances by pycnometer method[J]. Journal of Anshan Normal University,1991(3):51-52,94.倪成锦.比重瓶法测物质密度[J].鞍山师范学院学报,1991(3):51-52,94.
[15]	LIU M F,CHEN S F,LIU Y Y,et al. Characterization of sphericity and wall thickness uniformity of thick-walled hollow microspheres[J]. High Power Laser&Particle Beams,2014,26(2):159-163.刘梅芳,陈素芬,刘一杨,等.厚壁空心微球的球形度和壁厚均匀性的表征研究[J].强激光与粒子束,2014,26(2):159-163.
[16]	CUI B,XU M G,ZHANG T,et al. The study of porosity under constant temperature[J]. Gold,2006(1):21-24.崔波,许梦国,张滔,等.恒温状态下孔隙度的相关研究[J].黄金,2006(1):21-24.
[17]	Editorial Board of Methods for Monitoring and Analysis of Water and Wastewater. Methods for Monitoring and Analysis of Water and Wastewater[M]. 4th Ed. Beijing:China Environmental Science Press,2002:246-248.《水和废水监测分析方法》编委会.水和废水监测分析方法[M].四版.北京:中国环境科学出版社,2002:246-248.
[18]	LI X,LIU M,LI Y. Hydrodynamic behavior of liquid-solid micro-fluidized beds determined from bed expansion[J]. Particuology,2018,38:103-112.
[19]	PRELLBERG T,OWCZAREK A L. Pseudo-first-order transition in interacting self-avoiding walks and trails[J]. Computer Physics Communications,2002,147(1/2):629-632.
[20]	ZHANG Y F,DUAN N,WU K M,et al. Performance of diatomite-zeolite complex absorbent for phosphorus adsorption from aqueous solution[J]. Bulletin of the Chinese Ceramic Society,2013,32(7):1420-1426.张银凤,段宁,吴克明,等.硅藻土-沸石复合吸附剂对水中磷的吸附性能研究[J].硅酸盐通报,2013,32(7):1420-1426.
[21]	LI Q,DUAN H Y,GAO J Q,et al. Research on phosphorus removal performance of portland blast furnace slag cement[J]. Journal of Zhengzhou University (Engineering Science),2022,43(3):73-80.李强,段浩宇,高镜清,等.矿渣硅酸盐水泥除磷性能研究[J].郑州大学学报(工学版),2022,43(3):73-80.
[22]	BACELO H,PINTOR A M A,SANTOS S C R,et al. Performance and prospects of different adsorbents for phosphorus uptake and recovery from water[J]. Chemical Engineering Journal,2020,381:122566.
[23]	ZIVKOVIC V,BIGGS M J,ALWAHABI Z T. Experimental study of a liquid fluidization in a microfluidic channel[J]. AIChE Journal,2013,59(2):361-364.
[24]	ZHANG W Y,CHEN H,FANG C J. Improved calculation equation of the minimum fluidization velocity for solid-liquid fluidization system[J]. Petro-Chemical Equipment,2011,40(1):5-9.张卫义,陈罕,方陈靖.液-固流态化最小流态化速度计算方法改进[J].石油化工设备,2011,40(1):5-9.
[25]	WEN C Y,YU Y H. Mechanics of fluidization[J]. Chemical Engineering Progress Symposium Series,1966,62:100-111.
[26]	BOURGEOIS P,GRENIER P. The ratio of terminal velocity to minimum fluidising velocity for spherical particles[J]. The Canadian Journal of Chemical Engineering,1968,46(5):325-328.
[27]	SAXENA S C,VOGEL G J. The measurement of incipient fluidization velocities in a bed of coarse dolomite at temperature and pressure[J]. Transactions of the Institution of Chemical Engineers,1977,55:184.
[28]	NAKAMURA M,HAMADA Y,TOYAMA S,et al. An experimental investigation of minimum fluidization velocity at elevated temperatures and pressures[J]. The Canadian Journal of Chemical Engineering,1985,63(1):8-13.
[29]	ZHENG Z,YAMAZAKI R,JIMBO G. Minimum fluidization velocity of large particles at elevated-temperatures[J]. Kagaku Kogaku Ronbunshu,1985,11:115-117
[30]	TANG C,LIU M,LI Y. Experimental investigation of hydrodynamics of liquid-solid mini-fluidized beds[J]. Particuology,2016,27:102-109.
[31]	ZOU D L,ZHOU Y. Research on the minimum fluidizing velocity of pyrite ore[J]. Journal of Jilin Institute of Chemical Technology,1997(3):21-23.邹东雷,周游.硫铁矿物料最小流化速度的研究[J].吉林化工学院学报,1997(3):21-23.
[32]	DING D C. Engineering calculation of critical velocity and settling velocity of granular materials[J]. S P&BMH Related Engineer,2009(5):1-7,51.丁德承.颗粒物料临界速度和沉降速度的工程计算[J].硫磷设计与粉体工程,2009(5):1-7,51.
[33]	ZHAO H. Modulating the residence time and distribution of particles with different sizes in fluidized bed[D]. Beijing:University of Chinese Academy of Sciences (Institute of Process Engineering,Chinese,Academy of Sciences),2017.赵虎.流化床中不同粒径颗粒停留时间及其分布的调控研究[D].北京:中国科学院大学(中国科学院过程工程研究所),2017.
[34]	GONG M Y,LI X G,DU W,et al. Research progress on fluid catalyst attrition[J]. Tribology,2007,117(1):91-96.公铭扬,李晓刚,杜伟,等.流化催化剂磨损机制的研究进展[J].摩擦学学报,2007,117(1):91-96.
[35]	WANG J,WANG Y,HUANG X,et al. Adsorption dynamics and breakthrough characteristics based on the fluidization condition[J]. Environmental Science,2014,35(2):678-683.王君,王瑶,黄星,等.基于流态化作用的吸附反应动力学和穿透特征[J].环境科学,2014,35(2):678-683.