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通过酒糟在氮气气氛中热解炭化得到生物炭，进一步利用高锰酸钾进行改性，并将其用于染料废水中吸附孔雀石绿.通过SEM、XRD、FTIR对生物炭的形貌及官能团进行表征，进一步探讨溶液pH值、吸附时间和温度等因素对生物炭吸附性能的影响.结果表明，高锰酸钾的改性作用显著增加生物炭表面含氧官能团的数量并降低其Zeta电位，从而有效提升其对孔雀石绿的吸附能力.此外，改性生物炭对孔雀石绿的吸附过程与Langmuir吸附等温模型和准二级动力学模型相吻合，表明吸附过程主要受化学吸附机制的控制.温度的升高有利于吸附过程正向进行，303 K时最大吸附量达82.21 mg·g-1.通过对生物炭进行合理改性为染料废水的高效治理提供了一种新的思路.
Abstract：Biochar was obtained through the pyrolysis of distiller's grains in a nitrogen(N2)atmosphere, which was further modified with potassium permanganate(KMnO4)for the adsorption of malachite green in dye wastewater.The morphology and functional groups of the biochar were characterized using Scanning Electron Microscopy(SEM),X-ray Diffraction(XRD),and Fourier Transform Infrared Spectroscopy(FTIR).The effects of solution pH,adsorption time, and temperature on the adsorption performance of the biochar were also investigated.The results indicated that the modification with KMnO4 significantly increased the number of oxygen-containing functional groups on the biochar surface and reduced its Zeta potential, thereby effectively enhancing the adsorption capacity for malachite green.Moreover, the adsorption process of the modified biochar for malachite green was consistent with the Langmuir adsorption isotherm model and the pseudo-second-order kinetic model, suggesting that the adsorption process was primarily controlled by a chemical adsorption mechanism.An increase in temperature was found to be beneficial for the adsorption process, with the equilibrium adsorption capacity reaching 82.21 mg/g at 303 K.It is evident that the rational modification of biochar to enhance its adsorption performance can provide a new approach and method for the efficient treatment of dye wastewater.
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基本信息:
中图分类号:X703;TQ424
引用信息:
[1]李珞,刘东帆,毛亚鹏,等.改性酒糟生物炭的制备、表征及其对孔雀石绿的吸附性能[J].鞍山师范学院学报,2024,26(06):43-48.
基金信息:
扬州市科技计划项目(YZ2023156); 扬州市科技公共服务平台(YZ2022150)
2024-12-12
2024-12-12