ADSORPTION OF CHROMIUM (VI) FROM AQUEOUS SOLUTION ONTO ALUMINUM PILLARED PYROLUSITE LEACHING RESIDUE

作者：Sun Wei Yi; Shen Wu; Wang Qing Yuan; Ding Sang Lan; Su Shi Jun^*

来源：Fresenius Environmental Bulletin, 2013, 22(9A): 2645-2650.

• Adsorption
• chromium (VI)
• pyrolusite leaching residue
• aluminum pillared

Aluminum pillared pyrolusite leaching residue (Al-PLR) was developed from a low-cost residual solid byproduct in manganese hydrometallurgy, pyrolusite leaching residue (PLR). The Al-PLR was characterized by FTIR spectra. The ability of Al-PLR to adsorb Cr(VI) from aqueous solutions was evaluated by investigating the effect of experimental parameters such as adsorbent dose and contact time, as well as studying the adsorption kinetics and isotherms. Compared with PLR, the FTIR results showed a marked increase of structural hydroxyl groups in the interlayer in Al-PLR. It was found that the sufficient time to attain equilibrium was 60 mm and adsorption processes of Cr(VI) onto Al-PLR was better fitted by pseudo-second-order equation and the Langmuir equation. The adsorption rate of Cr(VI) was found to be controlled by external mass transfer and intra-particle diffusion throughout the entire adsorption period. Al-PLR had a Cr(VI) adsorption capacity of 2.577 mg/g as calculated by Langmuir equation.

• 出版日期2013
• 单位四川大学