Preparation of ultrahigh-surface-area sludge biopolymers-based carbon using alkali treatment for organic matters recovery coupled to catalytic pyrolysis

作     者：Yu Zhang Jiayi Tang Weijun Zhang Jing Ai Yanyang Liu Qiandi Wang Dongsheng Wang Yu Zhang;Jiayi Tang;Weijun Zhang;Jing Ai;Yanyang Liu;Qiandi Wang;Dongsheng Wang

作者机构：School of Environmental StudiesChina University of GeosciencesWuhan 430074China Hubei Provincial Engineering Research Center of Systematic Water Pollution ControlWuhan 430074China Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China State Key Laboratory of Environmental Aquatic ChemistryResearch Center for Eco–Environmental SciencesChinese Academy of SciencesBeijing 100085China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第8期

页      面：83-96页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51678546 and 41630318) the Major Science and Technology Program for Water Pollution Control and Treatment(No.2018 ZX 07110004) 

主　　题：Waste activated sludge Biopolymers-based carbons Adsorption Tetracycline 

摘      要：In this work,we employed waste activated sludge(WAS)as carbon source to prepare ultrahigh specific surface area(SSA)biopolymers-based carbons(BBCs)through alkali(KOH)treatment coupled to pyrolysis *** the pyrolysis process,the involvement of KOH made a great recovery of soluble biopolymers from WAS,resulting in highly-efficient catalytic *** Brunner-Emmett-Teller and pore volume of BBCs prepared at 800℃(BBC800)reached the maximum at 2633.89 m2·g-1 and 2.919 m3·g-1,respectively.X-ray photoelectron spectroscopy suggested that aromatic carbon in the form of C=C was the dominant fraction of C element in *** N element in BBCs were composed of pyrrolic nitrogen and pyridinic nitrogen at 700℃,while a new graphitic nitrogen appeared over 800℃.As a refractory pollutant of wastewater treatment plants,tetracycline(TC)was selected to evaluate adsorption performance of *** adsorption behavior of BBCs towards TC was conformed to the pseudo-second-order kinetic and the Langmuir models,signifying that chemisorption of monolayers was dominant in TC *** adsorption capacity of BBC800 reached the maximum at 877.19 mg·g-1 for 90 min at 298 *** analysis indicated that the adsorption process was endothermic and *** bonding andπ-πstacking interaction were mainly responsible for TC adsorption,and interfacial diffusion was the main rate-control step in adsorption *** presence of sol-uble microbial products(SMPs)enhanced TC *** work provided a novel strategy to prepare bio-carbon with ultrahigh SSA using WAS for highly-efficient removal of organic pollutants.