Low-cost structured alginate-immobilized bentonite beads designed for an effective removal of persistent antibiotics from aqueous solution

Yuliana, Maria, Ismadji, Suryadi, Lie, Jenni, Santoso, Shella Permatasari, Soetaredjo, Felycia Edi, Waworuntu, Gladdy, Putro, Jindrayani Nyoo and Wijaya, Christian Julius (2022) Low-cost structured alginate-immobilized bentonite beads designed for an effective removal of persistent antibiotics from aqueous solution. Low-cost structured alginate-immobilized bentonite beads designed for an effective removal of persistent antibiotics from aqueous solution, 207 (1). p. 112162. ISSN 00139351, 10960953, Jurnal Internasional Bereputasi SJR(2020): 1.46, Q1, H-Index: 136

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Abstract

The removal of persistent antibiotics from the water bodies can be quite challenging. The present study deals with the removal of doripenem, one of the most stable and persistent antibiotics, from aqueous solution via adsorption technique using the low-cost structured alginate-immobilized bentonite (Alg@iB) beads which can be easily recovered after the process. Alg@iB possesses a porous interior and higher basal spacing compared with the acid-activated bentonite (iB). Its dsorption/desorption isotherm corresponds to type IV IUPAC classification and H4-type hysteresis loops, implying the presence of slit- or plane-shaped pores. The influences of four independent adsorption parameters, e.g., pH, initial doripenem concentrations (md), temperature (T), and Alg@iB loading (mc), on the removal rate of doripenem (Yd) are investigated. The maximum Yd (95.8% w/w) is obtained at pH = 5, mc = 1.4% w/v, T = 50 ◦C, and md = 250 mg/l. The study suggests that the adsorption of doripenem is spontaneous and endothermic. Further analysis using the multi-linear intra-particle diffusion (IPD) model indicates that the rate-governing step in this adsorption process is the physical diffusion from the bulk solution to the boundary layer of Alg@iB. However, the mechanism study also considers the chemical hydrogen binding between the hydronium ions of Alg@iB and hydroxyl groups of doripenem as one of the driving forces that promote adsorption. Alg@iB shows good reusability with Yd > 90% w/w up to five adsorption cycles. Based on the study, the Alg@iB beads exhibit excellent affinity to doripenem, indicating that an effective doripenem removal can be achieved using this sorbent material.

Item Type:	Article
Additional Information:	Jurnal Internasional Bereputasi SJR(2020): 1.46, Q1, H-Index: 136
Uncontrolled Keywords:	Antibiotics Doripenem Adsorption Alginate-immobilized bentonite beads Facile strategy Wastewater treatment
Subjects:	Engineering > Chemical Engineering
Divisions:	Journal Publication
Depositing User:	F.X. Hadi
Date Deposited:	14 Jul 2022 05:42
Last Modified:	02 Feb 2024 05:32
URI:	http://repository.ukwms.ac.id/id/eprint/31530

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