Removal of Sulfamethoxazole from Solution by Raw and Chemically Treated Walnut Shells

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2012 Jun 30

PMID 22744161

Citations 6

Authors

Salome Teixeira

Cristina Delerue-Matos

Lucia Santos

Affiliations

Soon will be listed here.

Abstract

Purpose: The sorption of sulfamethoxazole, a frequently detected pharmaceutical compound in the environment, onto walnut shells was evaluated.

Methods: The sorption proprieties of the raw sorbent were chemically modified and two additional samples were obtained, respectively HCl and NaOH treated. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric (TG/DTG) techniques were applied to investigate the effect of the chemical treatments on the shell surface morphology and chemistry. Sorption experiments to investigate the pH effect on the process were carried out between pH 2 and 8.

Results: The chemical treatment did not substantially alter the structure of the sorbent (physical and textural characteristics) but modified the surface chemistry of the sorbent (acid-base properties, point of zero charge-pH(pzc)). The solution pH influences both the sorbent's surface charge and sulfamethoxazole speciation. The best removal efficiencies were obtained for lower pH values where the neutral and cationic sulfamethoxazole forms are present in the solution. Langmuir and Freundlich isotherms were applied to the experimental adsorption data for sulfamethoxazole sorption at pH 2, 4, and 7 onto raw walnut shell. No statistical difference was found between the two models except for the pH 2 experimental data to which the Freundlich model fitted better.

Conclusion: Sorption of sulfamethoxazole was found to be highly pH dependent in the entire pH range studied and for both raw and treated sorbent.

Citing Articles

Adsorption characteristics of metal-organic framework MIL-101(Cr) towards sulfamethoxazole and its persulfate oxidation regeneration.

Huang X, Hu Q, Gao L, Hao Q, Wang P, Qin D RSC Adv. 2022; 8(49):27623-27630.

PMID: 35542695 PMC: 9083902. DOI: 10.1039/c8ra04789h.

Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar.

Al-Wabel M, Ahmad M, Rafique M, Akanji M, Usman A, Al-Farraj A Molecules. 2021; 26(15).

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Application of Fe-based metal-organic framework and its pyrolysis products for sulfonamide treatment.

Tran T, Nguyen D, Nguyen H, Nanda S, Vo D, Do S Environ Sci Pollut Res Int. 2019; 26(27):28106-28126.

PMID: 31363978 DOI: 10.1007/s11356-019-06011-2.

Adsorption of pharmaceuticals from biologically treated municipal wastewater using paper mill sludge-based activated carbon.

Silva C, Jaria G, Otero M, Esteves V, Calisto V Environ Sci Pollut Res Int. 2019; 26(13):13173-13184.

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Wang L Environ Sci Pollut Res Int. 2013; 20(7):4635-46.

PMID: 23288676 DOI: 10.1007/s11356-012-1421-z.

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