Abstract
Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu cyanobacteria.When the impregnation ratio and activated temperature were 2 and 800 ℃,respectively,the optimal CBACs possessed an ultra-high specific surface(2178.90 m2·g-1)and plenty of micro-and meso-pores,as well as a high pore volume(1.01 cm3·g-1).Ascribed to ultra-high surface area,π-πinteraction,electrostatic interaction,as well as hydrogen-bonding interactions,the CBACs displayed huge superiority in efficient dye removal.The saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg g-1,superior to that of other reported biomass-activated carbons.The adsorption was endothermic and modeled well by the pseudo-second-order kinetic,intra-particle diffusion,and Langmuir models.This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.
基金项目
Key Research &Development program of Zhejiang Province(2021C03196)
国家重点研发计划(2022YFE0128600)
浙江省自然科学基金(LY22B060011)
维普
万方数据