Competitive Adsorption of Neutral Red and Cu2+ onto Pyrolytic Char: Isotherm and Kinetic Study
| Autor: | Hongjuan Bai, Shuaipeng Gao, Weihua Zou |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Journal of Chemical & Engineering Data. 57:2792-2801 |
| ISSN: | 1520-5134 0021-9568 |
| DOI: | 10.1021/je300686u |
| Popis: | Pyrolytic char treated with muffle furnace (TPC) was used as an adsorbent for the removal of neutral red (NR) and Cu2+ from aqueous solutions in a batch system. The adsorption behavior of NR and Cu2+ in single and binary systems on the TPC was studied. For a single system, the NR and Cu2+ adsorption isotherm followed Langmuir and Redlich–Peterson models with a maximum adsorption capacity of (0.216 and 0.261) mmol·g–1, respectively. The adsorption kinetics of NR and Cu2+ followed both the pseudosecond-order and Elovich equations. The diffusion process with two stages for NR and Cu2+ can describe the adsorption process. For a binary system, NR and Cu2+ showed competitive adsorption on the TPC. The adsorption isotherm of NR and Cu2+ still followed the Langmuir model, and the adsorption kinetic models of NR and Cu2+ still followed the pseudosecond-order kinetic model, while the diffusion process of NR was single-stage and two-stage for Cu2+. The adsorption capacity of NR and Cu2+ is reduced compared with that... |
| Databáze: | OpenAIRE |
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