Adsorption of Omeprazole on Biobased Adsorbents Doped with Si/Mg: Kinetic, Equilibrium, and Thermodynamic Studies

Abstract

This paper proposes an easy and sustainable method to prepare high-sorption capacity biobased adsorbents from wood waste. A biomass wood waste (spruce bark) was employed to fabricate a composite doped with Si and Mg and applied to adsorb an emerging contaminant (Omeprezole) from aqueous solutions, as well as synthetic effluents loaded with several emerging contaminants. The effects of Si and Mg doping on the biobased material’s physicochemical properties and adsorptive performance were evaluated. Si and Mg did not influence the specific surface area values but impacted the presence of the higher number of mesopores. The kinetic and equilibrium data presented the best fitness by the Avrami Fractional order (AFO) and Liu isotherm models, respectively. The values of Qmax ranged from 72.70 to 110.2 mg g−1 (BP) and from 107.6 to 249.0 mg g−1 (BTM). The kinetic was faster for Si/Mg-doped carbon adsorbent, possibly due to different chemical features provoked by the doping process. The thermodynamic data showed that the adsorption of OME on biobased adsorbents was spontaneous and favorable at four studied temperatures (283, 293, 298, 303, 308, 313, and 318 K), with the magnitude of the adsorption correspondent to a physical adsorption process (ΔH° < 2 kJ mol−1). The adsorbents were applied to treat synthetic hospital effluents and exhibited a high percentage of removal (up to 62%). The results of this work show that the composite between spruce bark biomass and Si/Mg was an efficient adsorbent for OME removal. Therefore, this study can help open new strategies for developing sustainable and effective adsorbents to tackle water pollution.

Single-Step Modification of Brewer’s Spent Grains Using Phosphoric Acid and Application in Cheese Whey Remediation via Liquid-Phase Adsorption

“…This suggests a strong likelihood that the model with the lowest BIC value is the most appropriate choice. In this case, the Hill model proved to be the most suitable for describing the adsorption of lactose, BOD5, and COD onto AC PO4 [91,92].…”

Anodic oxidation of esomeprazole in water by carbon coated titanium (C/Ti) electrode: Optimization and degradation analysis

“…Adsorption using biobased adsorbants doped by Si/Mg and carbon nanotubes found nearly 60% removal of omeprazole from water. However, the adsorbents after adsorption of emerging pollutants pose risk to the environment as their disposal becomes a major problem [11,12]. Advanced oxidation processes such as photocatalysis and electrochemical oxidation has been of major interest in the scienti c community for the removal of CECs as they can mineralize the pollutants such as dyes, pharmaceuticals and other organic compounds into benign inorganic species [13,14,15,16,17].…”

Synthesis, Characterization, and Adsorption Properties of Nitrogen-Doped Nanoporous Biochar: Efficient Removal of Reactive Orange 16 Dye and Colorful Effluents

“…Activated carbon (ACs)/biochars are the most widely used adsorbents worldwide due to their intrinsic properties of high surface area and surface functionalities [ 14 ]. Biochars are successfully produced from biomass wastes such as coconut shells [ 15 ], sludges [ 16 ], wood wastes [ 17 ], and other by-products. In this work, spruce bark waste was utilized to produce carbon adsorbents.…”