Effects of physical activation on pore textures and heavy metals removal of fiber-based activated carbons

Fiber-based activated carbons were prepared from phenolic and rayon fibers through physical activation methods. The raw materials were activated using steam and CO2, and the resultant activated carbons were characterized for pore distribution, textural properties and heavy metals removal. Two commercial activated carbon fibers, namely Fe400 and A10 were also employed for comparison. Activated carbon fiber with a higher specific surface area of 2938 m(2)/g was prepared from phenolic fiber by steam activation at 900 degrees C for 1 h. The material is microporous with pores concentrated at supermicropore region. The activated carbon fiber also demonstrates a greater removal of copper(II) and lead(II) at 50% and 75%, respectively, tied-up with its textural properties. (C) 2019 Elsevier Ltd. All rights reserved.

Automated summary

Fiber-based activated carbons prepared through steam activation exhibit high specific surface area and microporous structure, enabling effective removal of heavy metals such as copper and lead.