The effect of soaking process of agricultural wastes on the adsorption of methylene blue dye

Asil A. A., . and Abdualhamid S. A., . The effect of soaking process of agricultural wastes on the adsorption of methylene blue dye. pp. 1567-1571. ISSN 2231-7546

Locally available agricultural wastes barely wheat and oat straws were found to be of a low cost and promising adsorbents for the removal methylene blue dye (MB). The effect of soaking process of these straws in water has been investigated for 20 days. The adsorption of MB has been studied by using batch techniques. The influences of sorbent concentration adsorption time and initial dye concentration have been considered. The equilibrium adsorption capacities of straws for MB were obtained by using linear Freundlich Langmuir and Tempkin isotherms. The maximum dye adsorption capacity qmax for the straws before soaking follows the order; barely oat wheat with the values; 27.72 17.54 and 8.34 mg/g respectively. While the order of qmax for the soaked straws is; oat barely wheat with values equals; 50.34 22.22 and 11.11 mg/g respectively. Thermodynamic values of ”G corresponding to the MB uptake were evaluated from Langmuir model. The negative values of ”G indicated that the adsorption of MB by these straws is spontaneous and favorable process.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/19%20(04)%202012/37%20I...

Abstract

Locally available agricultural wastes barely wheat and oat straws were found to be of a low cost and promising adsorbents for the removal methylene blue dye (MB). The effect of soaking process of these straws in water has been investigated for 20 days. The adsorption of MB has been studied by using batch techniques. The influences of sorbent concentration adsorption time and initial dye concentration have been considered. The equilibrium adsorption capacities of straws for MB were obtained by using linear Freundlich Langmuir and Tempkin isotherms. The maximum dye adsorption capacity qmax for the straws before soaking follows the order; barely oat wheat with the values; 27.72 17.54 and 8.34 mg/g respectively. While the order of qmax for the soaked straws is; oat barely wheat with values equals; 50.34 22.22 and 11.11 mg/g respectively. Thermodynamic values of ”G corresponding to the MB uptake were evaluated from Langmuir model. The negative values of ”G indicated that the adsorption of MB by these straws is spontaneous and favorable process.

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Item Type:	Article
AGROVOC Term:	Water pollution
AGROVOC Term:	Pollution
AGROVOC Term:	Agricultural wastes
AGROVOC Term:	Textile industry
AGROVOC Term:	Toxicity
AGROVOC Term:	Dyes
AGROVOC Term:	Wastewater
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:27
URI:	http://webagris.upm.edu.my/id/eprint/22250

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