Citation: LI Jing, ZHANG Mei-Yi, PAN Gang, CHEN Hao. Influence of Adsorption Mode on Metastable-Equilibrium Adsorption of As(V) on TiO₂ Particles[J]. Acta Physico-Chimica Sinica, ;2013, 29(07): 1541-1549. doi: 10.3866/PKU.WHXB201304242 shu

Influence of Adsorption Mode on Metastable-Equilibrium Adsorption of As(V) on TiO₂ Particles

1.
Research Centre for Eco-Environmental Sciences, Chinese academy of sciences, Beijing 100085, P. R. China

Received Date: 21 January 2013
Available Online: 24 April 2013
Fund Project: 国家自然科学基金(21007083, 21277161, 20537020)资助项目 (21007083, 21277161, 20537020)

Column and batch adsorptions of As(V) on TiO₂ particles were conducted to investigate the influence of adsorption mode on metastable-equilibrium adsorption. Under the same thermodynamic conditions, a fixed amount of As(V) was added to both column and batch adsorption systems. Batch adsorption achieved equilibrium more quickly than column adsorption, and the equilibrated adsorption capacity of 0.42 mg·g^-1 for the batch adsorption system was considerably greater than 0.25 mg·g^-1 determined for the column adsorption system. Moreover, the adsorption irreversibility of the batch adsorption system was weaker than that of the column adsorption system. This indicated that the change of adsorption reaction mode (i.e., kinetic processes) could result in different metastable-equilibrium adsorption states under the same thermodynamic conditions. The discrepancy of adsorption behavior between column and batch adsorption systems should be caused by their different liquid film diffusion coefficients and total mass transfer coefficients, as well as different microscopic metastable-equilibrium adsorption states.
- Adsorption mode,
- Column adsorption,
- Batch adsorption,
- Adsorption irreversibility,
- Initial concentration effect
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of Adsorption Mode on Metastable-Equilibrium Adsorption of As(V) on TiO2 Particles

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通讯作者: 陈斌, bchen63@163.com

Influence of Adsorption Mode on Metastable-Equilibrium Adsorption of As(V) on TiO₂ Particles