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
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. © 2023 Elsevier B.V.
Chemical Engineering Department, Widya Mandala Surabaya Catholic University, East Java, Surabaya, 60114, Indonesia; Collaborative Research Center for Zero Waste and Sustainability, Jl. Kalijudan 37, East Java, Surabaya, 60114, Indonesia; 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; School of Energy and Environment, Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong; Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China; Center for Sustainable Resource Science, RIKEN, Yokohama, 230-0045, Japan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan; 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
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