Abstract
Carbofuran is largely applied insecticide, which resulted in its wide spreading in ground/surface water as well as food products; consequently investigation of efficient techniques for its removal is extensively considered. Herein, a facile approach for removal of carbofuran was developed by taking advantage of the highly adsorptive porous film of polyacrylonitrile (PAN) and titanium-based coordination polymer (NH2-MIL-Ti). Immobilization of NH2-MIL-Ti within the pre-prepared porous (P-PAN) film was essential for the construction of NH2-MIL-Ti@P-PAN film. The pore diameter of PAN film was estimated to be 8.5-51.2 mu m. The removal of carbofuran via the fabricated porous film was systematically studied and fitted to both pseudo 2nd ordered and Langmuir model. Results showed that Langmuir maximum removal of carbofuran was largely enhanced from 292.2 mg/g for P-PAN to 489.5-690.1 mg/g for NH2-MIL-Ti@P-PAN as a function of immobilized NH2-MIL-Ti amount. Thus, by increasing the amount of immobilized NH2-MIL-Ti@P-PAN in the film, the adsorption capacity of carbofuran was markedly improved, reaching 2.4 times higher when 30% of NH2-MIL-Ti was used. Importantly, after six reusing times, the removal of carbofuran by 30% NH2-MIL-Ti@P-PAN film was decreased by only 12.5%. The overall results attested that the fabricated NH2-MIL-Ti@P-PAN film could be efficiently implemented for removal of various insecticides in traces and other environmental applications.
[GRAPHICS]
.