Potassium permanganate modification of hydrochar enhances sorption of Pb(II), Cu(II), and Cd(II).

ABSTRACT: Hydrochars formed by hydrothermal carbonization of hickory wood, bamboo, and wheat straw at 200 °C were modified by potassium permanganate (KMnO₄) for the sorption of Pb(II), Cd(II), and Cu(II). The wheat straw hydrochar (WSHyC) modified with 0.2 M KMnO₄ resulted in the most promising adsorbent (WSHyC-0.2KMnO₄). Characterization of WSHyC and WSHyC-0.2KMnO₄ revealed that the modified hydrochar features large specific surface area, rich of surface oxygenic functional groups (OCFG), and a significant amount of MnOx micro-particles. Batch adsorption experiments indicated that the adsorption rate by WSHyC-0.2KMnO₄ was faster than for WSHyC, attaining equilibrium after around 5 h. The optimum adsorption capacity (Langmuir) of Pb(II), Cd(II),

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC10558135 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature