Kinetic Study of the Adsorption of Natural Organic Matter From Aqueous Solution by Surfactant Modified Zeolite

Vosoughi Niri, Mehdi; Mahvi, Amir Hosein; Mohammadi, Mohammad Javad; Takdastan, Afshin; Zahedi, Amir; Hashemzadeh, Bayram

doi:https://doi.org/10.17795/jjhs-29867

Kinetic Study of the Adsorption of Natural Organic Matter From Aqueous Solution by Surfactant Modified Zeolite

Document Type : Research Article

Authors

Mehdi Vosoughi Niri ¹ ^¶

Amir Hosein Mahvi ²^{, 3}

Mohammad Javad Mohammadi ¹^{, 4}

Afshin Takdastan ¹

Amir Zahedi ¹

Bayram Hashemzadeh ⁵

¹ Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran

² Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, IR Iran

³ National Institute of Health Research, Tehran University of Medical Sciences, Tehran, IR Iran

⁴ Razi Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran

⁵ Department of Environmental Health, Khoy School of Nursing and Public Health, Urumia University of Medical Sciences, Urumia, IR Iran

https://doi.org/10.17795/jjhs-29867

Abstract

Background: The presence of natural organic matter (NOM) in raw water sources is unfavorable and has long been a problem for water supply industries. Natural zeolite is a low cost material that can be found in nature. Zeolite can be modified and used for removal of NOM from aqueous solutions.
Objectives: In this study, for the first time, the efficiency of modified natural Iranian zeolite obtained from Semnan mines was investigated for removal of NOM from aqueous solution.
Materials and Methods: In this study, batch studies were set up to evaluate the effects of initial pH, contact time and also the initial NOM concentrations on adsorption behavior. The effective initial pH values were in acidic ranges for adsorption of the NOM by surfactant modified zeolite (SMZ). Kinetic studies showed that the adsorption of NOM by SMZ was a gradual process.
Results: The batch kinetics experiments showed that NOM adsorption by the adsorbents followed the pseudo-second order model. Results showed that the acidic pH is optimum for adsorption of NOM by SMZ.
Conclusions: The findings of this study show that natural zeolite modified with sodium dodecyl sulfate, as a cationic surfactant, is a promising adsorbent for removal of NOM.

Keywords

Natural Organic Matter

Adsorption Kinetics

Zeolites

Sodium Dodecyl Sulfate