Fig. 6From: Cesium-adsorption mechanisms of woody charcoal discussed on the basis of its functional groups and nanostructureIR-PA spectra in the 4000–800 cm−1 region for a raw Japanese oak sapwood, b cellulose powder, c OC300-2, d CC300-2, e OC500-2, and f CC500-2. Light green belt: wavenumber region from 1800 to 1700 cm−1. All spectra are displayed with the same vertical axis scaleBack to article page