Preparation of Hierarchically Interconnected Porous Banana Peel Activated Carbon for Methylene Blue Adsorption

Hierarchically interconnected porous activated carbon have high specific surface areas, large numbers of dye adsorption sites, and interconnected pores for dye molecule diffusion and transportation. We prepared hierarchically interconnected porous banana peel activated carbons(BPACs) via a green method involving hydrothermal pretreatment and KOH activation, and systematically tested its methylene blue(MB) adsorption capacity. SEM showed that the BPACs had an interconnected porous structure and high-porosity surface. The Brunauer-Emmett-Teller surface area was 601.21 m~2/g, the adsorption average pore diameter was 2.11 nm, and the total pore volume was 0.32 cm~3/g. The MB adsorption capacity increased with increasing temperature, initial MB concentration, and pH value; it decreased with increasing adsorbent dosage. The adsorption isotherms and kinetic results for MB adsorption on BPACs were best described by the Langmuir adsorption and pseudo-second-order kinetic models, respectively. BPACs have a well-developed hierarchically interconnected porous structure, which increase the MB adsorption capacity and removal efficiency. Systematic MB adsorption tests show that BPAC is a highly efficient and easily available adsorbent.     

你为什么借口这么多

理由无处不在 说个赵钱孙李的故事吧。这是周一。赵推开会议室的门，例会已进行过半。领导正说到兴起处，此刻顿住，问赵：“怎么又迟到了？”赵强作镇定地回答：“地铁突然停了，我等了好一会儿，才开。”领导无话可说，点头示意赵进来，赵在同事们的注视下走到座位，他呼出一口气—幸好想了这条理由，要是说实话“起晚了”，