钙改性花生壳生物炭对废水中四环素的吸附研究

doi:10.19964/j.issn.1006-4990.2022-0455

Abstract

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

CLC Number:

TQ132.32

FAN Fangfang, TONG Zhongkai, ZUO Weiyuan. Study on adsorption of tetracycline from wastewater by calcium modified peanut shell biochar[J]. Inorganic Chemicals Industry, 2023, 55(6): 109-115.

Figures/Tables 12

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Langmuir				Freundlich
k_L/（L∙mg^-1）	Q_m/（mg∙g^-1）	R²		k_F/（mg∙g^-1）	n	R²
0.859	72.251	0.999		45.604	8.278	0.812

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

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