Adsorption of Tetracycline by Magnetic Mesoporous Silica Derived from Bottom Ash—Biomass Power Plant

Phan Thi Hong Hanh, Khamphe Phoungthong, Suchada Chantrapromma, Patcharanan Choto, Chuleeporn Thanomsilp, Piyanuch Siriwat, Nuttachat Wisittipanit and Thitipone Suwunwong ()
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Phan Thi Hong Hanh: Industrial Ecology in Energy Research Center, Faculty of Environmental Management, Prince of Songkla University, Songkhla 90112, Thailand
Khamphe Phoungthong: Industrial Ecology in Energy Research Center, Faculty of Environmental Management, Prince of Songkla University, Songkhla 90112, Thailand
Suchada Chantrapromma: Division of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
Patcharanan Choto: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Chuleeporn Thanomsilp: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Piyanuch Siriwat: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Nuttachat Wisittipanit: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Thitipone Suwunwong: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand

Sustainability, 2023, vol. 15, issue 6, 1-13

Abstract: In recent years, the contamination of the aquatic environment with antibiotics, including tetracyclines, has drawn much attention. Bottom ash (BA), a residue from the biomass power plant, was used to synthesize the magnetic mesoporous silica (MMS) and was utilized as an adsorbent for tetracycline (TC) removal from aqueous solutions. The MMS was characterized by Fourier transform-infrared (FTIR), X-ray diffraction (XRD) pattern, and scanning electron microscopy (SEM). Optimum conditions were obtained in overnight incubation at 60 °C, a pH of 6–8, and an adsorption capacity of 276.74 mg/g. The isotherm and kinetic equations pointed to a Langmuir isotherm model and pseudo-first-order kinetic optimum fitting models. Based on the very low values of entropy changes (Δ S° ), the negative value of enthalpy changes (Δ H° ) (−15.94 kJ/mol), and the negative Gibbs free-energy changes (Δ G° ), the adsorption process was physisorption and spontaneous.

Keywords: antibiotic contamination; tetracycline; solid waste; adsorption mechanisms (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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