Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (6): 109-115.doi: 10.19964/j.issn.1006-4990.2022-0455

• Environment·Health·Safety • Previous Articles     Next Articles

Study on adsorption of tetracycline from wastewater by calcium modified peanut shell biochar

FAN Fangfang1,2(), TONG Zhongkai3, ZUO Weiyuan1,2()   

  1. 1. Guangxi Key Laboratory of Urban Water Environment,Baise 533000,China
    2. Baise UniversityCollege of Chemistry and Environmental Engineering,Baise 533000,China
    3. No. 5 People′s Hospital of Datong,Datong 037000,China
  • Received:2022-07-28 Online:2023-06-10 Published:2023-06-14

Abstract:

The treatment of biomass waste and the removal of tetracycline are important issues in environmental remediation.In this study,calcium modified peanut shell biochar(CaBC) was prepared by impregnation-roasting method with peanut shell as raw materials.The prepared biochar were characterized by X-ray diffraction(XRD),infrared spectrometer(FT-IR),scanning electron microscope(SEM) and nitrogen adsorption-desorption instrument.The effects of solution pH and coexisting ions on the removal performance of tetracycline(TC) from wastewater by biochar were investigated.The adsorption kinetics and adsorption isotherms of the process were studied as well.The results showed that the prepared biochar had rich mesoporous structure,which was beneficial to the adsorption of tetracycline.CaBC-800 had the best adsorption effect on tetracycline at pH of 7.0.The presence of coexisting ions had no significant effect on the adsorption capacity of biochar.Kinetic studies showed that the adsorption process of TC by CaBC-800 was following the pseudo-second-order model equation with a constant of 0.001 3 g/(mg∙min).The adsorption isotherm was according with Langmuir equation with the maximum theoretical adsorption capacity of 72.251 mg/g.This study provided a new adsorbent for tetracycline removal and demonstrated the potential of CaBC-800 in wastewater remediation.

Key words: biochar, modification, tetracycline, adsorption, kinetics

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