Effect of nonionic surfactants on the solubilization of alachlor

Journal of Hazardous Materials
Ioannis Xiarchos, Danae Doulia

Abstract

The ability of nonionic surfactants to solubilize the pesticide alachlor was studied. Two homologue series, octylphenol ethoxylates (Triton X-114, Triton X-100 and Triton X-102) and ethoxylated decyl alcohols (Neodol 91-5E, Neodol 91-6E and Neodol 91-8E) were used at concentrations 3 critical micelle concentration (CMC) and 6 CMC. The rate of solubilization of a sufficient quantity of alachlor (for saturation) in aqueous solution containing the micelles of nonionic surfactant was recorded. The experimental data were fitted to a first-order kinetic model. The rate constant, saturation concentration and enhancement factor were estimated for each surfactant system. The effect of surfactant structure, CMC concentration, pesticide structure and its physicochemical properties on the effectiveness of solubilization was determined. In terms of solubilization capability, the nonionic surfactants of each homologue series can be ranked as follows: Neodol 91-8E>Neodol 91-6E>Neodol 91-5E and Triton X-102>Triton X-100>Triton X-114. The more hydrophilic Neodol series was proved more efficient in alachlor solubilization than Triton series. The enhancement factor values ranged from 1.064 to 1.995 at 3 CMC and 1.320 to 2.919 at 6 CMC. The result...Continue Reading

Citations

Dec 4, 2013·Journal of Agricultural and Food Chemistry·Haim Katz, Yael G Mishael
Nov 16, 2013·Environmental Science and Pollution Research International·Eman M ElSayed, Shiv O Prasher
Jan 9, 2013·Journal of Environmental Management·Eman M ElsayedRamanbhai M Patel
Jan 20, 2009·Colloids and Surfaces. B, Biointerfaces·Shohei NakamuraYoshikiyo Moroi
Aug 21, 2007·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Reza HosseinzadehYousef Nikkhahi
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Jun 6, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Yukiko SatoOsamu Shibata

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