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Removal of Methelene Blue from Aqueous Solution by Dehydrated Maize Tassels

Author Affiliations

  • 1Bindura University of Science Education, P. Bag 1020, Bindura, ZIMBABWE

Res.J.chem.sci., Volume 4, Issue (11), Pages 5-12, November,18 (2014)


Maize tassels are agricultural wastes that are abundant. They were used to prepare Dehydrated Maize Tassels for methylene blue adsorption. Dehydrated Maize Tassels were produced by mixing maize tassels and concentrated sulphuric acid for 24 hours. The adsorption studies of methylene blue from aqueous solution using maize tassels was studied in the range of 1–5 mg dm 3 initial methylene blue concentration, at different temperatures, different adsorbent dosages and at varied contact times. The adsorption was determined spectrophotometrically at 660nm. Adsorption increased with increase in adsorbate dosage. Increase in initial methylene blue concentration resulted in increased adsorption. Maximum adsorption occurred at pH of 6.8, temperature of 25°C, and contact time of 20 minutes. The Freundlich and Langmuir adsorption models were used for the mathematical description of the adsorption equilibrium. The data fitted well into the Langmuir isotherm. The maximum adsorption capacity obtained was 99.84%.


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