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Adsorption of norfloxacin from wastewater by biochar with different substrates

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Abstract

The type of feedstock and pyrolysis temperature are the main reasons affecting the properties of the resulting biochar. Therefore, this paper investigates the effects of different feedstocks (peanut shell, corn straw and soybean straw) and different pyrolysis temperatures (300, 450 and 600 ℃) on the structural morphology and elemental composition of the resulting biochar. The optimum pyrolysis temperature of 600 ℃ was selected based on the comparison of the adsorption of NFX (norfloxacin) by the biochar prepared at different temperatures. Characterization of biochar materials using x-ray diffractometer, fourier transform infrared spectrometer and scanning electron microscope to study the changes in the physicochemical and structural properties of biochar. The results showed that the pH, surface area and ash content of biochar are increased with increasing temperature. The results of isothermal adsorption and adsorption kinetics experiments showed that the adsorption processes of the three biochar species on NFX were consistent with the Langmuir model and Pseudo-second order kinetic model. The adsorption process occurred in the surface layer of the biochar and was dominated by chemisorption. The inhibition of the adsorption of NFX was more obvious with the higher valence state of cations and the higher ion concentration. The adsorption mechanism of biochar on NFX includes pore filling, hydrogen bonding and electrostatic interactions.

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Funding

National Key RESEARCH and development Program (2021YFD1500800); the article was supported by funding from the Technological Development Project of Jilin Province (20210202119NC).

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Contributions

XL, YJ, SN and MY conducted the experiments measurements. TC and PZ conceived this study and designed the experiments. XL performed the statistical analysis and wrote the manuscript. XM coordinated the experiments and oversaw the data analysis. XL and XM revised the manuscript. All authors contributed to manuscript revision,read,and approved the submitted version.

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Correspondence to Xiulan Ma.

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No conflict interest exists in the submission of this manuscript, and the manuscript is approved by all authors for publication. The work described was original research that has not been published previously, and is not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the manuscript that is enclosed.

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Li, X., Jiang, Y., Chen, T. et al. Adsorption of norfloxacin from wastewater by biochar with different substrates. Environ Geochem Health 45, 3331–3344 (2023). https://doi.org/10.1007/s10653-022-01414-6

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  • DOI: https://doi.org/10.1007/s10653-022-01414-6

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