Kinetic and equilibrium studies of urea adsorption onto activated carbon: Adsorption mechanism

研究成果: Article査読

20 被引用数 (Scopus)

抄録

We found that activated carbon effectively removed urea from solution and that urea adsorption onto activated carbon followed a pseudo-second-order kinetic model. We classified the urea adsorption on activated carbon as physical adsorption and found that it was best described by the Halsey adsorption isotherm, suggesting that the multilayer adsorption of urea molecules on the adsorption sites of activated carbon best characterized the adsorption system. The mechanism of adsorption of urea by activated carbon involved two steps. First, an amino (–NH2) group of urea interacted with a carbonyl (–C˭O) group and a hydroxyl (−OH) group on the surface of activated carbon via dipole–dipole interactions. Next, the –C˭O group of the urea molecule adsorbed to the activated carbon interacted with another –NH2 group from a second urea molecule, leading to multilayer adsorption.

本文言語English
ページ(範囲)1063-1066
ページ数4
ジャーナルJournal of Dispersion Science and Technology
38
7
DOI
出版ステータスPublished - 2017 7 3

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • ポリマーおよびプラスチック

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