Application of Carrageenan Stabilized Fe0 Nanoparticles for the Degradation of Chlorpyrifos in water
Journal Title: International Journal of Research in Chemistry and Environment (IJRCE) - Year 2012, Vol 2, Issue 2
Abstract
This paper describes the synthesis of carrageenan-stabilized Fe0 (abbreviated as CG-Fe0) nanoparticles and their applications to the degradation of chlorpyrifos under controlled laboratorial conditions. For this purpose batch mode experiments were conducted to understand the effects of carageenen on the surface characteristics of Fe0 nanoparticles, optimum removal of chlorpyrifos and other parameters including dosage of CG-Fe0 and pH of solution. Scanning electron microscopy (SEM) analysis indicated that CG-Fe0 nanoparticles were well dispersed, and remained in suspension for days compared to non-stabilized Fe0 nanoparticles precipitated within minutes. Batch experiments demonstrated CG-Fe0 nanoparticles could effectively destructed chlorpyrifos. Near 89% of reduction efficiency was achieved by CG-Fe0 for 6hrs treatment. The first order chlorpyrifos degradation rates were 0.387h-1 and 0.178h-1 for CG-Fe0 and Fe0 particles respectively. The removal percentage of chlorpyrifos increased dramatically as the reaction pH decreased from 10 to 4. The effect of CG-Fe0 was also studied and the results found that the degradation followed pseudo-first order kinetics.
Authors and Affiliations
Reddy Vijaya Bhaskar, Madhavi V. , Reddy Gangadhara
Keywords
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