Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw

doi:10.1016/S1004-9541(14)60004-5

Chin.J.Chem.Eng. ›› 2014, Vol. 22 ›› Issue (2): 208-213.DOI: 10.1016/S1004-9541(14)60004-5

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Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw

REN Xiaoli, YANG Ling, LIU Min

Department of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China

Received:2013-06-24 Revised:2013-10-09 Online:2014-01-28 Published:2014-02-05
Contact: REN Xiaoli
Supported by:
Supported by the Shanxi Science and Technology Agency Research Project (20100321085) and the Scientific Research Foun-dation of the Shanxi Education Department (20111029).

Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw

任晓莉, 杨玲, 刘敏

Department of Environmental and Safety Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China

通讯作者: REN Xiaoli
基金资助:
Supported by the Shanxi Science and Technology Agency Research Project (20100321085) and the Scientific Research Foun-dation of the Shanxi Education Department (20111029).

Abstract

Abstract: A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 m²·g^-1, micropore volume of 0.176 cm²·g^-1 and average pore radius of 5.0 nm. The kinetic, equilibrium isotherm and thermodynamic characteristics of trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene- 4',6,8-trisulphonate (acid scarlet 3R) onto the adsorbent from sludge and straw were investigated. The results indicated that the pseudo second order adsorption was the predominant adsorption mechanism of acid scarlet 3R. Thus, the adsorption phenomenon was suggested as a chemical process. The adsorption data were fitted better with Langmuir model than Freundlich model, indicating that the adsorption of acid scarlet 3R belonged to the monolayer adsorption and mainly occurred in micropores.

Key words: kinetic, thermodynamic, acid scarlet 3R, adsorbent, sludge, straw

摘要： A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 m²·g^-1, micropore volume of 0.176 cm²·g^-1 and average pore radius of 5.0 nm. The kinetic, equilibrium isotherm and thermodynamic characteristics of trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene- 4',6,8-trisulphonate (acid scarlet 3R) onto the adsorbent from sludge and straw were investigated. The results indicated that the pseudo second order adsorption was the predominant adsorption mechanism of acid scarlet 3R. Thus, the adsorption phenomenon was suggested as a chemical process. The adsorption data were fitted better with Langmuir model than Freundlich model, indicating that the adsorption of acid scarlet 3R belonged to the monolayer adsorption and mainly occurred in micropores.

关键词: kinetic, thermodynamic, acid scarlet 3R, adsorbent, sludge, straw

REN Xiaoli, YANG Ling, LIU Min. Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw[J]. Chin.J.Chem.Eng., 2014, 22(2): 208-213.

任晓莉, 杨玲, 刘敏. Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw[J]. Chinese Journal of Chemical Engineering, 2014, 22(2): 208-213.

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Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw

Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw

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