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Title: Ultrasound assisted adsorption of basic dye onto organically modified bentonite (nanoclay)
Authors: Sonawane, Shirish
Chaudhari, Prashant
Ghodke, Shailesh
Phadtare, Sachin
Meshram, Satish
Keywords: Adsorption;Blue dye;Methylene;Nanoclay;Ultrasound effect
Issue Date: Feb-2009
Publisher: CSIR
Abstract: Sonochemical adsorption of basic methylene blue dye (CI 52015) into organophilic bentonite (nanoclay) is explored. Tetrabutyl ammonium chloride (TBAC) modified nanoclay has showed amorphous exfoliated nature, while N-cetyl-N,N,N trimethyl ammonium bromide (CTAB) modified nanoclay has revealed intercalating crystalline nature, as supported by X-ray analysis. Presence of NH₂, CH₂ groups onto nanoclay platelet is confirmed from FTIR spectrum analysis. In presence of ultrasound, due to decrease in diffusion resistance, both modified nanoclays exhibit higher adsorption due to an easy insertion of dye into clay platelets. Calculated Langmuir adsorption isotherm, Q₀ and Langmuir constant ‘b’ for TBAC modified nanoclay, respectively were 0.34 mg/mg 0.246. Intercalating agent has a significant contribution during overall process.
Page(s): 162-167
ISSN: 0022-4456
Appears in Collections:JSIR Vol.68(02) [February 2009]

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