Selective oxidation of primary alcohol for cellulose at C6 position and its application in adsorption of bisphenol A

Document Type

Article

Publication Date

1-1-2014

Abstract

The oxidized cellulose (OC) was prepared by HNO3/H3PO4-NaNO2 oxidation system. The structure of OC was characterized by FT-IR spectroscopy and solid-state 13C NMR, and the carboxyl content was determined by acid-base titration method in present study. Meanwhile, the prepared OC was used as adsorbent and its adsorption properties for bisphenol A (BPA) were investigated. The results revealed that the C6 primary hydroxyl groups of cellulose were selectively oxidized to carboxyl groups by this oxidation system, and the carboxyl content was about 20%. The adsorption equilibrium time was about 30 min at 298 K, and the maximum adsorption capacity (qm) of OC for BPA was 12.67 mg/g. The adsorption capacity increased with the increase of initial BPA concentration. Neutral condition and low temperature were benificial for adsorption, but the presence of electrolytes in the solution was negative for the adsorption of BPA. The adsorption of BPA on OC was considered as a monolayer adsorption and chemisorption process. The adsorption kinetics followed the second-order equation. Langmuir model fitted the equilibrium data better than the Freundlich isotherm.

Publication Source (Journal or Book title)

Chemistry and Industry of Forest Products

First Page

65

Last Page

72

This document is currently not available here.

Share

COinS