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Equilibrium biosorption isotherm for lead ion on chaff [An article from: Journal of Hazardous Materials]
Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A new adsorbent system for removing lead ion from aqueous solutions has been investigated. This new adsorbent is cereal chaff, an agriculture product in middle-west region in China. Variables of the system include biosorption time, chaff dose and solution temperature. The experimental results were fitted to the Langmuir, Freundlich, Koble-Corrigan and Temkin model isotherms to obtain the characteristic parameters of each model. Both the Langmuir and Koble-Corrigan isotherms were found to best represent the measured biosorption data. According to the evaluation using the Langmuir equation, the maximum biosorption capacities of lead ion onto chaff was 12.5mgg^-^1 at 293K. Using the thermodynamic equilibrium coefficients obtained at different temperatures, various thermodynamic parameters, such as @DG^0, @DH^0 and @DS^0, have been calculated. The thermodynamics of lead ion-chaff system indicates spontaneous and exothermic process. It was concluded that an increase in temperature result in a lower metal loading per unit weight of the chaff.
Description:
A new adsorbent system for removing lead ion from aqueous solutions has been investigated. This new adsorbent is cereal chaff, an agriculture product in middle-west region in China. Variables of the system include biosorption time, chaff dose and solution temperature. The experimental results were fitted to the Langmuir, Freundlich, Koble-Corrigan and Temkin model isotherms to obtain the characteristic parameters of each model. Both the Langmuir and Koble-Corrigan isotherms were found to best represent the measured biosorption data. According to the evaluation using the Langmuir equation, the maximum biosorption capacities of lead ion onto chaff was 12.5mgg^-^1 at 293K. Using the thermodynamic equilibrium coefficients obtained at different temperatures, various thermodynamic parameters, such as @DG^0, @DH^0 and @DS^0, have been calculated. The thermodynamics of lead ion-chaff system indicates spontaneous and exothermic process. It was concluded that an increase in temperature result in a lower metal loading per unit weight of the chaff.
