Peach gum for efficient removal of methylene blue and methyl violet dyes from aqueous solution
writer：Li Zhou*, Jiachang Huang, Benzhao He, Faai Zhang, Huabin Li
keywords：Peach gum；adsorption；dye；methylene blue；methyl violet
source：期刊
specific source：Carbohydr. Polym. 2014, 101, 574-581
Issue time：2014年
This study
investigated the potential use of natural peach gum (PG) as alternative
adsorbent for the removal of dyes from aqueous solutions.
The PG showed high adsorption capacities and selectivity for cationic dyes
(e.g., methylene blue (MB) and methyl violet (MV)) in the pH range 6-10. 98%
of MB and MV could be adsorbed within 5 min, and both of the adsorptions
reached equilibrium within 30 min. The dye uptake process followed the pseudo-second-order
kinetic model. The intraparticle diffusion was not the sole rate controlling
step. Equilibrium adsorption isotherm data indicated a good fit to the Langmuir
isotherm model. Regeneration study revealed that PG could be well
regenerated in acid solution. The recovered PG still exhibited high adsorption
capacity even after five cycles of desorption-adsorption. On the basis of its
excellent adsorption performance and facile availability, PG can be employed as
an efficient low cost adsorbent for environmental cleanup.