Application of Peanut Shell-Based Porous Materials for the Effective Removal of HCN in Cigarette Mainstream Smoke

In this study, carboxymethyl peanut shell (CPS) was prepared, and then peanut shell-based porous material (PPS) was obtained by the complexation reaction of CPS with Cu2+. The carboxymethyl content of CPS increased gradually with the increase of the amounts of monochloroacetic acid and sodium hydroxide, and the Cu2+ loading amount of PPS increased gradually with the increase of carboxymethyl content. The scanning electron microscope results showed that PPS-1, PPS-2, PPS-3 (PPS-1~3) had many nanoscale pores. The nitrogen adsorption-desorption results suggested that PPS-1~3 were all mesoporous materials with an average pore diameter of about 10 nm, while their Brunauer-Emmet-Teller surface area and pore volume of PPS-1 to PPS-3 increased gradually. Compared with the control cigarette, the release of HCN in cigarette mainstream smoke could be effectively reduced with the use of PPS-1~3, the reduction rate of HCN per total particulate matter were 54.9%, 63.1% and 67.0%, respectively.