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Removal of acetaminophen (ACT) from aqueous solution by using nanosilica adsorbent: experimental study, kinetic and isotherm modeling

Akbar Eslami (Environmental and Occupational Hazards Control Research Center, Shahid Beheshi University of Medical Sciences, Tehran, Iran)
Zahra Goodarzvand Chegini (Department of Environmental and Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran)
Maryam Khashij (Department of Environmental Health Engineering, Kermanshah University of Medical Sciences, Kermanshah, Iran)
Mohammad Mehralian (Environmental Science and Technology Research Center, Department of Environmental Health Engineering, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran)
Marjan Hashemi (Environmental and Occupational Hazards Control Research Center, Shahid Beheshi University of Medical Sciences, Tehran, Iran)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 10 December 2019

Issue publication date: 6 January 2020

Abstract

Purpose

A nanosilica adsorbent was prepared and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and BET.

Design/methodology/approach

The optimum conditions for the highest adsorption performance were determined by kinetic modeling. The adsorbent was used for the adsorption of acetaminophen (ACT), and the parameters affecting the adsorption were discussed like pH, initial concentration, contact time and adsorbent dosage. The adsorbent have been characterized by SEM, XRD and BET analysis. The kinetic models including pseudo-first-order and pseudo-second-order with Langmuir and Freundlich isotherm models were applied to investigate the kinetic and isotherms parameters.

Findings

The adsorption of ACT increased to around 95% with the increase of nanosilica concentration to 30 g/L. Moreover, the adsorption process of ACT follows the pseudo-second-order kinetics and the Langmuir isotherm with the maximum adsorption capacity of 609 mg/g.

Practical implications

This study provided a simple and effective way to prepare of nanoadsorbents. This way was conductive to protect environmental and subsequent application for removal of emerging pollutants from aqueous solutions.

Originality/value

The novelty of the study is synthesizing the morphological and structural properties of nanosilica-based adsorbent (specific surface area, pore volume and size, shape and capability) and improving its removal rate through optimizing the synthesis method; and studying the capability of synthesis of nanosilica-based adsorbent for removal of ACT as a main emerging pharmaceutical water contaminant.

Keywords

Acknowledgements

Conflict of interest: No conflict of interest was declared by the authors.

Citation

Eslami, A., Goodarzvand Chegini, Z., Khashij, M., Mehralian, M. and Hashemi, M. (2020), "Removal of acetaminophen (ACT) from aqueous solution by using nanosilica adsorbent: experimental study, kinetic and isotherm modeling", Pigment & Resin Technology, Vol. 49 No. 1, pp. 55-62. https://doi.org/10.1108/PRT-06-2019-0057

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited