Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (04): 829-836.doi: 10.3866/PKU.WHXB201301211

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Elimination of Bisphenol A from Water via Graphene Oxide Adsorption

XU Jing1, ZHU Yong-Fa1,2   

  1. 1 Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China;
    2 Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science and Technology, Nanjing 210044, P.R. China
  • Received:2012-10-31 Revised:2013-01-18 Published:2013-03-25
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2013CB632403), National High Technology Research and Development Program of China (863) (2012AA062701), Special Project on Innovative Method from the Ministry of Science and Technology of China (2009IM030500), and Atmospheric Environment Monitoring & Pollution Control Program of Jiangsu Province, China (AEMPC201103).

Abstract:

The elimination of bisphenol A (BPA) from aqueous solution by adsorption on graphene oxide (GO) was investigated. The maximum adsorption capacity (qm) of GO for BPA estimated from the Langmuir isotherm was 87.80 mg·g-1 at 25℃. The required contact time to reach adsorption equilibrium was about 30 min, which was much shorter than that of activated carbon. The adsorption kinetics and isotherm data fitted well with the pseudo-second-order kinetic model and the Langmuir isotherm, respectively. Neutral pH and low solution temperature were favorable for adsorption, whereas the presence of NaCl in the solution was unfavorable. The GO had good recyclability and could be reused several times with a slight decline in adsorption ability. Both hydrogen bonding and π-π interaction were thought to be responsible for the adsorption of BPA on GO. The excellent adsorption capacity and high adsorption rate of GO result from its sheet-like structure and the abundant oxygen-containing groups on its surface. Although qm of GO for BPA is lower than that of graphene, GO has the benefits of large scale production, a hydrophilic surface with plenty of oxygen-containing groups, and good dispersion in water. Therefore, GO can be regarded as a good potential adsorbent for water treatment.

Key words: Adsorption, Graphene oxide, Bisphenol A, Endocrine-disrupting chemicals, Water treatment

MSC2000: 

  • O647