title: Removal of natural organic matter (NOM) from an aqueous solution by NaCl and surfactant-modified clinoptilolite.
abstract: Zeolitic tuffs are found in different parts of the world. Iranian zeolite is a low-cost material that can be frequently found in nature. Surfactant-modified zeolite (SMZ) can be used for the adsorption of natural organic matter (NOM) from aqueous solutions. The adsorption study was conducted to evaluate the adsorption capacity of SMZ; furthermore, the effects of contact time, initial pH, and the initial adsorbent dose on the adsorption process were investigated in a batch system. The kinetic studies showed that the adsorption of NOM on SMZ was a gradual process. The optimum initial pH values for the adsorption of NOM on SMZ were in the acidic ranges. The batch kinetic experiments showed that the adsorption followed the pseudo-second-order kinetic model with good correlation coefficients. The equilibrium data were well described by the Langmuir isotherm model. The results show that the natural zeolite being modified with NaCl and hexadecyltrimethylammonium bromide as a cationic surfactant was an appropriate adsorbent for the removal of NOM.
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Mehdi Vosoughi
authors.initials: MV
authors.lastname: Niri
authors.affiliation: National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran E-mail: mvn_20@yahoo.com.
authors.forename: Amir Hosein
authors.initials: AH
authors.lastname: Mahvi
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Alimohammadi
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Shirmardi
authors.affiliation: National Exploration Directorate Oil Company, NIOC, Iran.
authors.forename: Hafez
authors.initials: H
authors.lastname: Golastanifar
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Mohamma Javad
authors.initials: MJ
authors.lastname: Mohammadi
authors.affiliation: Department of Environmental Health, School of Public Health, North Khorasan University of Medical Sciences, Bojnourd, Iran.
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Naeimabadi
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: Maria
authors.initials: M
authors.lastname: Khishdost
mesh_terms: D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D012965:Sodium Chloride / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C083175:clinoptilolite; D017641:Zeolites; D012965:Sodium Chloride