Preparation of MIL100/MIL101-alginate composite beads for selective phosphate removal from aqueous solution

Eric Alvares; Stanley Tantoro; Christian Julius Wijaya; Kuan-Chen Cheng; Felycia Edi Soetaredjo; Hsien-Yi Hsu; Artik Elisa Angkawijaya; Alchris Woo Go; Chang-Wei Hsieh; Shella Permatasari Santoso

doi:10.1016/j.ijbiomac.2023.123322

Preparation of MIL100/MIL101-alginate composite beads for selective phosphate removal from aqueous solution

Int J Biol Macromol. 2023 Mar 15:231:123322. doi: 10.1016/j.ijbiomac.2023.123322. Epub 2023 Jan 21.

Affiliations

¹ Chemical Engineering Department, Widya Mandala Surabaya Catholic University, Surabaya 60114, East Java, Indonesia.
² Chemical Engineering Department, Widya Mandala Surabaya Catholic University, Surabaya 60114, East Java, Indonesia; Collaborative Research Center for Zero Waste and Sustainability, Jl. Kalijudan 37, Surabaya 60114, East Java, Indonesia.
³ Institute of Food Science and Technology, National Taiwan University, #1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan; Institute of Biotechnology, National Taiwan University, #1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, 91, Hsueh-Shih Road, Taichung 40402, Taiwan; Department of Optometry, Asia University, 500, Lioufeng Rd., Wufeng, Taichung 41354, Taiwan. Electronic address: kccheng@ntu.edu.tw.
⁴ School of Energy and Environment, Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, China; Shenzhen Research Institute of City University of Hong Kong, Shenzhen 518057, China.
⁵ Center for Sustainable Resource Science, RIKEN, Yokohama 230-0045, Japan.
⁶ Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
⁷ Department of Food Science and Biotechnology, National Chung Hsing University, South Dist., Taichung City 40227, Taiwan; Department of Medical Research, China Medical University Hospital, North Dist., Taichung City 404333, Taiwan.
⁸ Chemical Engineering Department, Widya Mandala Surabaya Catholic University, Surabaya 60114, East Java, Indonesia; Collaborative Research Center for Zero Waste and Sustainability, Jl. Kalijudan 37, Surabaya 60114, East Java, Indonesia. Electronic address: shella@ukwms.ac.id.

PMID: 36690234
DOI: 10.1016/j.ijbiomac.2023.123322

Abstract

Numerous studies have reported various approaches for synthesizing phosphate-capturing adsorbents to mitigate eutrophication. Despite the efforts, concerns about production cost, the complexity of synthesis steps, environmental friendliness, and applicability in industrial settings continue to be a problem. Herein, phosphate-selective composite adsorbents were prepared by incorporating alginate (Alg) with MIL100 and MIL101 to produce the MIL100/Alg and MIL101/Alg beads, where Fe³⁺ served as the crosslinker. The unsaturated coordination bond of MIL100 and MIL101 serves as a Lewis acid that can attract phosphate. The adsorption equilibrium isotherm, uptake kinetics, and effects of operating parameters were studied. The phosphate adsorption capacity of MIL100/Alg (103.3 mg P/g) and MIL101/Alg (109.5 mg P/g) outperformed their constituting components at pH 6 and 30 °C. Detailed evaluation of the adsorbent porosity using N₂ sorption reveals the formation of mesoporous structures on the Alg network upon incorporation of MIL100 and MIL101. The composite adsorbents have excellent selectivity toward anionic phosphate and can be easily regenerated. Phosphate adsorption by MIL100/Alg and MIL101/Alg was driven by electrostatic attraction and ligand exchange. Preliminary economic analysis on the synthesis of the adsorbents indicates that the composites, MIL100/Alg and MIL101/Alg, are economically viable adsorbents.

Keywords: Hard soft acid base theory; MOF-alginate composite; Phosphate adsorption.

MeSH terms

Adsorption
Alginates* / chemistry
Hydrogen-Ion Concentration
Kinetics
Phosphates / chemistry
Water / chemistry
Water Pollutants, Chemical* / chemistry

Substances

Alginates
Phosphates
Water
Water Pollutants, Chemical