Inorganic Chemicals Industry ›› 2024, Vol. 56 ›› Issue (7): 126-134.doi: 10.19964/j.issn.1006-4990.2023-0526

• Environment·Health·Safety • Previous Articles     Next Articles

Preparation and adsorption properties of waste polyester⁃based activated carbon activated by ZnCl2

ZHANG Bangcheng1(), WANG Li2()   

  1. 1.Xuzhou No. 1 Middle School,Xuzhou 221100,China
    2.Xuzhou institute of technology,College of Materials and Chemical Engineering,Xuzhou 221100,China
  • Received:2023-11-06 Online:2024-07-10 Published:2024-08-01
  • Contact: WANG Li E-mail:byfgvsm@163.com;wangli121221@163.com

Abstract:

In order to realize the resource utilization of waste polyester fabrics,waste polyester⁃based activated carbon(WPT-AC) was prepared by ZnCl2 activation⁃high temperature pyrolysis method.The crystal phase,characteristic groups and specific surface area pore structure of WPT-AC were characterized by XRD,FT-IR and BET.The optimal process for preparing WPT-AC was determined by orthogonal experiment.The adsorption performance of WPT-AC for methylene blue(MB) was evaluated and the adsorption mechanism was analyzed.The results showed that the specific surface area of WPT-AC prepared under the optimal process conditions of 45% ZnCl2 solution,pyrolysis temperature of 900 ℃,heating rate of 5 ℃/min and pyrolysis time of 90 min was as high as 1 089.72 m2/g,and the yield was 58.45%.The abundant pore structure was beneficial to improve the adsorption of pollutants.The removal rate of MB by WPT-AC was 97.49% under the conditions of WPT-AC dosage of 2.0 g/L,initial concentration of MB of 500 mg/L,adsorption temperature of 40 ℃ and adsorption time of 80 min.WPT-AC also had a good adsorption effect on oxytetracycline(CIP),and the presence of electrostatic attraction was beneficial to the improvement of adsorption performance under the condition of Ni(Ⅱ) coexistence.The quasi⁃second⁃order kinetic model and Langmuir isothermal adsorption model of WPT-AC were more suitable for fitting the MB adsorption process of WPT-AC.

Key words: waste polyester?based activated carbon, adsorption, methylene blue, zinc chloride activation, high temperature pyrolysis

CLC Number: