Adsorption of PtCl62- from Hydrochloric Acid Solution by Chemically Modified Lignin Based on Rice Straw

作者：Zhang, Baoping^*; Shen, Bowen; Guo, Meichen; Liu, Yun

来源：Australian Journal of Chemistry, 2018, 71(12): 931-938.

DOI：10.1071/CH18282

• METAL-IONS
• RECOVERY
• PLATINUM
• REMOVAL
• EQUILIBRIUM
• BIOSORBENTS
• ADSORBENTS
• PYROLYSIS
• PALLADIUM
• CATALYSTS

A novel adsorbent with the properties of selective adsorption based on rice straw was used to adsorb PtCl62- from hydrochloric acid solution by batch sorption. Many influencing factors for PtCl62- adsorption, such as initial concentration of PtCl62-, adsorption time, and concentration of hydrochloric acid, were optimized. The results suggested that the saturation adsorption capacity of PtCl62- was 218.8mgg(-1) and the equilibrium adsorption time was 120min. The adsorbent had excellent selectivity on PtCl62- when the concentration of hydrochloric acid was lower than 0.5molL(-1). The adsorption fitted well with the Langmuir isotherm model and pseudo-second-order kinetics model. The adsorption mechanism was investigated by FT-IR and X-ray photoelectron spectroscopy analyses and it indicated that Pt-IV was reduced to Pt-II by hydroxy groups and then coordinated with N through ion exchange between Cl- and PtCl42-.

• 出版日期2018
• 单位武汉科技大学