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Low cost sorbents for the removal of methyl parathion pesticide from aqueous solutions
- Source :
- Chemosphere. 66:1829-1838
- Publication Year :
- 2007
- Publisher :
- Elsevier BV, 2007.
-
Abstract
- Sorptive potential of selected agricultural waste materials i.e. rice (Oryza sativa) bran (RB), bagasse fly ash (BFA) of sugarcane (Saccharum officinarum), Moringa oleifera pods (MOP) and rice husk (RH) for the removal of methyl parathion pesticide (MP) from surface and ground waters has been investigated. Optimization of operating parameters of sorption process, i.e. sorbent dose, agitation time, pH, initial concentration of sorbate, and temperature have been studied. The sorption data fitted to Freundlich, Langmuir and Dubinin-Radushkevich (D-R) sorption isotherms. The maximum capacities of RB, BFA, MOP and RH for MP were calculated to be 3.6+/-0.8, 5.3+/-1.4, 5.2+/-1.5 and 4.7+/-1.0 mmolg(-1) by Freundlich, 0.39+/-0.009, 0.39+/-0.005, 0.36+/-0.004 and 0.35+/-0.008 mmolg(-1) by Langmuir and 0.9+/-0.08, 1.0+/-0.10, 1.0+/-0.10 and 0.9+/-0.07 mmolg(-1) by D-R isotherms respectively, employing 0.1g of each sorbent, at pH 6, 90 min agitation time and at 303 K. Application of first order Lagergren and Morris-Weber equations to the kinetic data yielded correlation coefficients, close to unity. Thermodynamic parameters of sorption process, i.e. DeltaH, DeltaS and DeltaG were computed and their negative values indicated the exothermic and spontaneous nature of sorption process. The pesticide may be stripped by sonication with methanol, making the regeneration and reutilization of sorbents promising. The sorbents investigated exhibited their potential applications in water decontamination, treatment of industrial and agricultural waste waters.
- Subjects :
- Langmuir
Time Factors
Environmental Engineering
Sorbent
Health, Toxicology and Mutagenesis
Industrial Waste
Methyl Parathion
Industrial waste
Water Purification
chemistry.chemical_compound
Adsorption
Environmental Chemistry
Freundlich equation
Pesticides
Environmental Restoration and Remediation
Chromatography
Aqueous solution
Molecular Structure
Public Health, Environmental and Occupational Health
Sorption
General Medicine
General Chemistry
Hydrogen-Ion Concentration
Pollution
chemistry
Thermodynamics
Methanol
Water Pollutants, Chemical
Nuclear chemistry
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 66
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....90f1ba2ed5d166866ae0c0452d9f0731