Chitosan-Derived Porous Activated Carbon for the Removal of the Chemical Warfare Agent Simulant Dimethyl Methylphosphonate.

ABSTRACT: Methods for the rapid removal of chemical warfare agents are of critical importance. In this work, a porous activated carbon material (C-PAC) was prepared from chitosan flakes via single-step potassium carbonate (K₂CO₃) activation for the prompt adsorption of dimethyl methylphosphonate (DMMP). C-PAC samples were prepared using different carbonization temperatures (350, 550, and 750 °C) at a constant K₂CO₃/chitosan ratio (1:2) and using different activator ratios (K₂CO₃/chitosan ratios of 1:0.5, 1:1, 1:2, and 1:3) at 750 °C. Furthermore, we evaluated the effect of preparation conditions on the adsorption capacities of the various C-PAC materials for DMMP under ambient conditions (25 °C). Notably, for the C-PAC material prepared at 750 °C using a K₂CO₃/chitosan ratio of 1:2, the DMMP adsorption was saturated at approximately 412 mg·g^-1 carbon after 48 h. The good performance of this material makes it a potential candidate for use in remedial applications or protective gear.

SUBMITTER: Yu H 

PROVIDER: S-EPMC6956094 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature