Preparation of Porous Carbon Materials as Adsorbent Materials from Phosphorus-Doped Watermelon Rind

In this study, phosphorus-doped watermelon rind carbon material (WC-M) was prepared by a muffle furnace, and the adsorption performance of WC-M to dyes investigated. At same time, effects dye concentration, pH, temperature, other factors on effect were experiment, furnace used carbonize doped with phosphoric acid, which simplified experimental operation. Regarding results SEM analysis, surface structure materials is diverse. Isothermal maps nitrogen desorption show that contains more microporous structures exhibits active sites. The good properties against cationic (malachite green, MG) anionic (active black, AB). neutral condition conducive MG, alkaline AB. rate reaches maximum in initial stage adsorption, capacity 50% total within 10 minutes before reaction, then gradually decreases until equilibrium. mechanism explored pseudo-first-order kinetic model, second-order intraparticle diffusion model. through analysis multiple isotherm models, overall process followed Langmuir MG inclined monolayer electron reached 182.68 mg⋅g−1. reusability AB discussed. concentrations 120 mg⋅L−1 150 mg⋅L−1, after h desorption, rates 67.7% 83.3%, respectively; five adsorption–desorption cycles, still 78.5%, indicating have recovery effect. use as an belongs high-value application rind, “turning waste into treasure” will not pose certain threat environment. This experiment also suitable for durian pineapple “waste” biomass materials, has generalizations.