期刊论文详细信息
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Adsorption Behavior of Lignophenol Compounds and Their Dimethylamine Derivatives Prepared from Rice and Wheat Straws for Precious Metal Ion
Keisuke Ohto2  Shafiq Alam1  Biplob K. Biswas2  Hiroyuki Harada2  Kanjana Khunathai2  Hidetaka Kawakita2  Masamitsu Funaoka3  Miyuki Matsueda2  Katsutoshi Inoue2 
[1] Faculty of Engineering and Applied Science, Memorial University;Department of Applied Chemistry, Saga University;School of Bioresources, Mie University
关键词: Lignophenol;    Dimethylamine;    Wheat Straw;    Rice Straw;    Precious Metals;    Separation;   
DOI  :  10.1252/jcej.10we246
来源: Maruzen Company Ltd
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【 摘 要 】

References(18)Cited-By(3)Lignophenol-based adsorbents were prepared from rice and wheat straws and further modified by immobilization of dimethylamine groups. The adsorption behavior of the substrates for various metal ions in hydrochloric acid solution was studied. The lignophenol adsorbents selectively adsorbed Au(III) over the entire range of hydrochloric acid concentrations tested but showed no affinity for base metal ions. Adsorption of Au(III), Pd(II), and Pt(IV) on the dimethylamine-modified adsorbents was also unaffected by the presence of base metal ions. The highest loading capacity was observed for Au(III) in the case of all adsorbents; this could be primarily explained by the facile reduction of Au(III) to Au(0). The electrostatic interactions between protonated amine groups and anionic chloro complexes of Pd(II) and Pt(IV) in acidic chloride media was proposed as the main adsorption mechanism.

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