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Dechlorination of chlorophenols by zero valent iron impregnated silica
- Source :
- Journal of Environmental Sciences. 24:765-773
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- Laboratory studies were conducted to find out the efficacy of uniquely prepared zero valent iron impregnated silica in transforming xenobiotic chlorophenols namely 4-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol. Continuous mode column experiments were performed to investigate the transformation of chlorophenols by varying pH, column height, flow rate and initial chlorophenol concentration. Reusability study of the zero valent iron impregnated silica was studied as well as the morphological changes and the chemical composition of the catalyst medium were also investigated. Dechlorination kinetic studies were conducted and the order of dechlorination of chlorophenols was found to be 2,4,6-trichlorophenol > 2,4-dichlorophenol > 4-chlorophenol. The optimum pH, column height and flow rate were found to be 7, 20 cm and 0.75 L/hr respectively for all chlorophenols in the reaction duration of 4 hr. Intermediates formed during dechlorination study were identified by gas chromatography-mass spectroscopy analysis. This method was applied to real pulp and paper wastewater and was found satisfactory.
- Subjects :
- Paper
Environmental Engineering
Halogenation
Iron
Inorganic chemistry
Industrial Waste
engineering.material
Waste Disposal, Fluid
Water Purification
Catalysis
chemistry.chemical_compound
Environmental Chemistry
Recycling
Spectroscopy
Chemical composition
General Environmental Science
Chlorophenol
Zerovalent iron
Chemistry
Pulp (paper)
Spectrometry, X-Ray Emission
General Medicine
Hydrogen-Ion Concentration
Chromatography, Ion Exchange
Silicon Dioxide
Volumetric flow rate
Kinetics
Wastewater
Microscopy, Electron, Scanning
engineering
Rheology
Chlorophenols
Subjects
Details
- ISSN :
- 10010742
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Sciences
- Accession number :
- edsair.doi.dedup.....a0f62ae163de26dc6d4e597cb3f63d41