title: Peach gum for efficient removal of methylene blue and methyl violet dyes from aqueous solution.
abstract: 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.
authors.affiliation: Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, and College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, PR China. Electronic address: zhouli@glut.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.forename: Jiachang
authors.initials: J
authors.lastname: Huang
authors.forename: Benzhao
authors.initials: B
authors.lastname: He
authors.forename: Faai
authors.initials: F
authors.lastname: Zhang
authors.forename: Huabin
authors.initials: H
authors.lastname: Li
mesh_terms: D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification; D005840:Gentian Violet / Q000737:chemistry* / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry* / Q000302:isolation & purification*; D009994:Osmolar Concentration; D053149:Plant Gums / Q000737:chemistry*; D027861:Prunus / Q000737:chemistry*; D012996:Solutions; D014867:Water / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D053149:Plant Gums; D012996:Solutions; D014867:Water; D005840:Gentian Violet; D008751:Methylene Blue
keywords: Adsorption; Dye; Methyl violet; Methylene blue; Peach gum