Adsorption and catalytic oxidation of organic pollutants using Fe-zeolite

In this work, a natural zeolite, modified and loaded with iron (NZ-A-Fe) as a heterogeneous catalyst, was characterized for its suitability as a permeable reactive barrier (PRB) material for treatment of aromatic hydrocarbons in groundwater. Adsorption and oxidation processes were analyzed. Batch ad...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2018-02, Vol.77 (3-4), p.939-947
Main Authors: Russo, Analia V, Andrade, Cesar Velasco, De Angelis, Laura E, Jacobo, Silvia E
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Aromatic compounds
Aromatic hydrocarbons
Batch reactors
Benzene
Benzene - chemistry
Carbon
Catalysis
Catalysts
Catalytic oxidation
Experiments
Groundwater
Groundwater - chemistry
Groundwater treatment
Hazardous materials
Hydrocarbons
Hydrogen peroxide
Hydrogen Peroxide - chemistry
Hydrogen-Ion Concentration
Iron
Iron - chemistry
Kinetics
Leaching
Materials science
Nanoparticles
Oxidation
Oxidation-Reduction
Oxidizing agents
Permeable reactive barriers
pH effects
Phenols
Pollutants
Pollution prevention
Removal
Solutions
Surfactants
Toluene
Toluene - chemistry
Water Pollutants, Chemical - chemistry
Water Purification - methods
Xylene
Xylenes - chemistry
Zeolites
Zeolites - chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, a natural zeolite, modified and loaded with iron (NZ-A-Fe) as a heterogeneous catalyst, was characterized for its suitability as a permeable reactive barrier (PRB) material for treatment of aromatic hydrocarbons in groundwater. Adsorption and oxidation processes were analyzed. Batch adsorption tests for benzene, toluene and xylene (BTX) aqueous concentrated solutions were performed at neutral pH. Kinetic adsorption was described with the pseudo-second-order model. Experiments were performed using a stirred batch reactor with near 11 mM initial BTX concentration applying NZ-A-Fe as solid catalyst and H O as an oxidant. BTX removal reached 80% in 600 min in these experimental conditions. Catalytic oxidation was described with a pseudo-first-order kinetic model. No significant iron leaching was detected during all the experiences. These investigations show that coupling adsorption with catalytic oxidation with this novel system is a promising procedure to simultaneously remove BTX from moderately concentrated aqueous solution at neutral pH in groundwater.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2017.611