Citation: Masoud Giahi, Roohan Rakhshaee, Mohammad A. Bagherinia. Removal of methylene blue by tea wastages from the synthesis waste waters[J]. Chinese Chemical Letters, ;2011, 22(2): 225-228. doi: 10.1016/j.cclet.2010.07.030 shu

Removal of methylene blue by tea wastages from the synthesis waste waters

a Department of Applied Chemistry, Faculty of Science, Islamic Azad University, Lahijan Branch, Lahijan 1616, Iran;
b Department of Applied Chemistry, Faculty of Science, Islamic Azad University, Rasht Branch, Rasht 41335-3516, Iran

Received Date: 25 May 2010

Fund Project: The authors are grateful to the Islamic Azad University, Lahijan and Rasht Branches for their help and support.

The tea wastages could remove methylene blue (MB) as a cationic dye from waste water corresponding to second-order kinetic model. Thermodynamic studies showed that adsorption equilibrium constant (K_L) and maximum adsorption capacities (Q_max) were increased with increasing temperature. The removal efficiency of MB for Co 0.01 mmol/L at optimum conditions was about 85%. The maximum uptake capacity (Q_max) of methylene blue in a batch reactor was 0.328,0.542 and 0.659 mmol/g at 15,25 and 40℃, respectively. The enthalpy change (△H) and entropy change (△S) were 11.356 kJ/mol and 20.563 J/(mol K), respectively.
- Waste water,
- Methylene blue,
- Biosorption,
- Tea wastages
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