Adsorptive behavior of acrylic acid-grafted bacterial cellulose to remove cadmium for a membrane-adsorbent hybrid process

作者：Ahn Yeonghee; Ha Myung Gue; Choi Yong Jin^*

来源：Desalination and Water Treatment, 2013, 51(25-27): 5074-5079.

DOI：10.1080/19443994.2013.768369

• Acrylic acid
• Adsorbent
• Bacterial cellulose
• Cd adsorption
• Environmentally friendly material

An adsorbent for Cd ions was prepared through the modification of bacterial cellulose (BC) with acrylic acid (AAc) using electron beam-induced grafting polymerization. The modification of BC was confirmed by FTIR/ATR and scanning electron microscope (SEM). Batch adsorption test was performed to investigate adsorptive behavior of the adsorbent in aqueous solution. Adsorption was analyzed using the Benaissa, Kurniawan, Langmuir, and Freundlich models. In the kinetic behavior, it was confirmed that it was pseudo-second-order rather than pseudo-first-order kinetic rate expression. Adsorption isotherm behavior followed the Langmuir model rather than Freundlich model, indicating that AAc-grafted BC was monolayer covered with Cd ions. The adsorption capacity (Q(m)) calculated from Langmuir isotherm was 68.97mgg(-1). AAc-g-BC shows potential as a useful Cd-adsorbent made of an environmentally friendly material.

• 出版日期2013-7-1