Photonic crystals in biology - NanoTR-VI

PPoster Session, Thursday, June 17Theme F686 - N1123Synthesis of Nano Silica Based Sol-Gel Dendritic Materials for the Removal of Atrazine from Water111UAyber YldrmUP P, Aylin ÖzkanP Pand Turgay SeçkinP P*1PDepartment of Chemistry, University of Inonu, Malatya, TR Türkiye 44280Abstract-In this study, synthesis, nano silica was prepared by Stöber method and modified with -aminopropyltriethoxysilane by sol-gelmethod and surfactant modified atrazine captivator was covalently attached to the matrix as dendritic group The present study demonstrates anovel approach for preparing nano materials with atrazine removal capacity.The broadleaf herbicide atrazine is one of the most widelyused herbicides for weed control during the production ofcorn, sorghum, and other crops [1] Although many Europeancountries have banned its use, over 60 million pounds ofatrazine are used annually. As a result, atrazine is the mostcommonly detected herbicide in ground and standing waterand this herbicides have been linked to health risks in animalsand humankind.Currently, the best available technology for removal ofatrazine from groundwater is activated charcoal. Alternativemethods for the removal of atrazine from groundwater includeengineered organoclays, molecularly imprintedpolymers,engineered microorganisms, oxidation strategies ,photodegradation using ultraviolet light, nano- orultrafiltration, and polar polymeric supports. The use ofreactive solid supports for the selective removal of atrazinefrom water has not been reported. Reactive resins have beensuccessfully applied to the efficient removal of electrophilicand nucleophilic compounds from solutions. However,applications have been limited mainly to organic andcombinatorial synthesis. Here, we describe a strategy for thesequestration of atrazine and its major metabolites. Thestrategy is presumably generalizable across many of thetriazine herbicides, as well as other select herbicides such asmetolachlor [2-3]amine and cyanuric chloride in THF and attached to the silicamatrix by covalent bonding between amino groups of thematrix and the chloro group of the dendrimer.Conventional characterization methodology was used tocharacterize the nano materials which includes FT-IR, SEM-EDAX, TGA, DTA and DSC analysis.The authors wishes to thank Inonu University ScientificResearch Center for the support 2010-22 and 17.*Corresponding author: ayberyildirim@gmail.com[1] (a) For recent efforts see: Kim, J.-B.; Huang, W.; Miller, M. D.;Baker, G. L.; Bruening, M. L. J Polym.Sci Part A: Polym Chem2003, 41, 386–394. (b) Barner, L.; Zwaneveld, N.; Pham, Y.; Davis,T. P. J Polym Sci Part A: Polym Chem 2002, 40, 4180–4192. (c)Blomberg, S.; Ostberg, S.; Harth, E.; Bosman,A. W.; Van Horn, B.Hawker, C. J. J Polym.Sci Part A: Polym Chem 2002, 40, 1309–1320. (d) Luo, Hutchison, J. B.; Anseth, K. S.; Bowman, C. N.JPolym Sci Part A: Polym Chem 2002, 40, 1885–1891.[2] (a) Tomalia, D. A.; Frechet, J. M. J. J Polym SciPart A: PolymChem 2002, 40, 2719–2728. (b) Frechet,J. M. J. J Polym Sci Part A:Polym Chem 2003, 41, 3713–3725.3. (a) Lee, B. Y; Oh, J. S.Macromolecules 2000, 33,3194–3195. (b) Mayr, M.; Buchmeiser, M.R.;Wurst, K. Adv Synth Catal 2002, 344, 712–719.NNNNNNNNNNNNNNNNNNFigure 1. Surfactant modified silica surfaceThis paper describes the selection of nucleophilic groups foratrazine sequestration using solution phase competitionreactions; the use of these groups on a solid support for thesequestration of atrazine, its metabolites, and another triazineherbicide; and the evidence for covalent attachment.In this work, nano silica was prepared by Stöber method andmodified with -aminopropyltriethoxy silane by means of solgelmethod. Surfactant dendrimer was prepared with t-octyl6th Nanoscience and Nanotechnology Conference, zmir, 2010 796