title: Physicochemical and porosity characteristics of thermally regenerated activated carbon polluted with biological activated carbon process.
abstract: The characteristics of thermally regenerated activated carbon (AC) polluted with biological activated carbon (BAC) process were investigated. The results showed that the true micropore and sub-micropore volume, pH value, bulk density, and hardness of regenerated AC decreased compared to the virgin AC, but the total pore volume increased. XPS analysis displayed that the ash contents of Al, Si, and Ca in the regenerated AC respectively increased by 3.83%, 2.62% and 1.8%. FTIR spectrum showed that the surface functional groups of virgin and regenerated AC did not change significantly. Pore size distributions indicated that the AC regeneration process resulted in the decrease of micropore and macropore (D>10 μm) volume and the increase of mesopore and macropore (0.1 μm<D<10 μm) volume in regenerated AC, which are benefit for water treatment. These results will provide a theoretical basis for the reuse of biological waste (spent AC) from BAC process.
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China; Beijing Industrial Design and Research Institute, Beijing 100021, China. Electronic address: lemon_tju@sohu.com.
authors.forename: Lihua
authors.initials: L
authors.lastname: Dong
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Liu
authors.affiliation: Taixing-Yixin Activated Carbon Co., Ltd., Jiangsu Provence 225452, China.
authors.forename: Renfu
authors.initials: R
authors.lastname: Jiang
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Zhansheng
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000535:Aluminum / Q000032:analysis; D002118:Calcium / Q000032:analysis; D002606:Charcoal / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D016062:Porosity; D059027:Recycling / Q000379:methods*; D012825:Silicon / Q000032:analysis; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002606:Charcoal; D000535:Aluminum; D002118:Calcium; D012825:Silicon
keywords: Elemental compositions; Porosity characteristics; Regenerated activated carbon; Surface functional groups; Virgin activated carbon