小麦秸秆生物炭对孔雀石绿吸附性能的研究

doi:10.19964/j.issn.1006-4990.2024-0036

Abstract

Abstract:

In order to realize the resource utilization of wheat straw，wheat straw biochar was prepared at different temperatures.The functional groups on the surface of biochar，pore structure and microscopic morphology of biochar were characterized by Fourier transform infrared spectroscopy（FT-IR），N₂ adsorption-desorption test scanning electron microscopy（SEM），respectively.The prepared biochar was used to adsorb malachite green simulated wastewater.The results showed that with the increase in carbonization temperature，cellulose and hemicellulose in biochar were decomposed more thoroughly，leading to increased aromatization.Additionally，the total pore volume and specific surface area of biochar were gradually increased，while the average pore size was decreased，and the micropore volume was increased.The biochar prepared at 300 ℃ was used to adsorb malachite green in simulated wastewater with an initial concentration of 500 mg/L.When the dosage of biochar was 3 g/L，the adsorption rate was the fastest at 40 ℃，and the adsorption equilibrium was basically reached after 2.5 h，and the maximum adsorption removal rate was up to 84.92%.The results of adsorption-desorption regeneration experiments showed that the biochar achieved a regeneration rate of 92.70% after three cycles，indicating a successful regeneration effect.The method of preparing biochar from wheat straw was simple.Biochar had a high adsorption capacity for malachite green and could be reused.It provided a theoretical basis and practical support for the application of wheat straw biochar in dyeing wastewater treatment.

Key words: wheat straw, biochar, malachite green, adsorption

CLC Number:

TQ127.1

SONG Zhaoxia, LIU Yongkang, GUO Yaokun, WANG Tengfei. Study on adsorption performance of wheat straw biochar on malachite green[J]. Inorganic Chemicals Industry, 2024, 56(9): 128-135.

Figures/Tables 12

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Study on adsorption performance of wheat straw biochar on malachite green

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