Adsorption and desorption of Cr(III) on a spherical cellulose adsorbent

作者：Chen Ruoqi; Liu Yifan; Liu Minghua^*; Zhao Yang

来源：5th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2011, 2011-05-10 to 2011-05-12.

DOI：10.1109/icbbe.2011.5781032

• Adsorption capacities
• Adsorption process
• Adsorption temperature
• Adsorption time
• Carboxymethyl group
• Dynamic adsorption
• Dynamic process
• Initial concentration
• Langmuir and freundlich adsorption
• NaOH solutions
• Rate dependent
• Spherical cellulose adsorbent
• Static adsorption
• Static and dynamic
• Static experiments

An investigation was conducted on adsorption and desorption of Cr(III) with a new spherical cellulose adsorbent containing the carboxymethyl group by using static and dynamic methods. The static experiments showed that the adsorption of Cr(III) on adsorbent was pH, adsorption temperature, initial concentration and adsorption time dependent. The adsorption process followed both Langmuir and Freundlich adsorption isotherms. The dynamic process was highly flow rate dependent. Moreover, the adsorption capacity and adsorption percentage were 21.44 mg/g and 91.0% from dynamic way, respectively. The Cr(III) adsorbed can be recovered with NaOH solution. Additionally, the maximum desorption percentage of Cr(III) was 94.5% using a 2.0 mol/l NaOH aqueous solution from static and dynamic methods. Only 3.6% of adsorption capacity decreased after 20 cycles of re adsorption and desorption. The spherical cellulose adsorbent is demonstrated to be an effective adsorbent for recovery of Cr(III) from aqueous solutions.

• 出版日期2011
• 单位福州大学