Study on adsorption performance of pine needle biochar on rhodamine B

Abstract Biochar is regarded as a kind of high-efficiency, environmentally friendly and economical new adsorbent because of its low preparation cost, large specific surface area, developed pore structure and rich surface functional groups. It has broad application prospects in the field of sewage treatment. Using pine massoniana as raw material, the pine needle charcoal was obtained by pyrolysis at 300 °C, and the material was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The dyeing wastewater was simulated with rhodamine B to study the pine needle. The adsorption performance of biochar showed that the adsorption kinetics of rhodamine B and the pseudo-second-order kinetic equation were higher, indicating that the adsorption rate was controlled by liquid membrane diffusion and intraparticle diffusion. The liquid membrane diffusion was main control step.