Abstract

Isotherms of the adsorption methylene blue (MB) from aqueous solutions by sulfate lignin, aspen wood, and wood samples pretreated with ozone are recorded and analyzed. The adsorption isotherms are described in terms of the Langmuir model. Adsorption capacity, specific surface area, and values of adsorption interaction constants are determined. It is found that ozone pretreatment of wood reduces the constant of dye bonding to a surface, while the sorption capacity remains almost unchanged. IR spectroscopy data show that ozonized lignocellulosic materials are characterized by high contents of carbonyl and carboxyl groups capable of electrostatic interaction and ion exchange, and low contents of aromatic structures. It is concluded that the presence of lignin in the plant sorbent contributes to an increase in the efficiency of dye sorption.

中文翻译：

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木质纤维素材料的臭氧化对阳离子染料吸附的影响

摘要

记录和分析硫酸木质素、白杨木和用臭氧预处理的木材样品从水溶液中吸附亚甲蓝 (MB) 的等温线。吸附等温线根据朗缪尔模型进行描述。确定吸附容量、比表面积和吸附相互作用常数的值。发现木材的臭氧预处理降低了染料与表面的结合常数，而吸附能力几乎保持不变。红外光谱数据表明，臭氧化木质纤维素材料的特点是能够进行静电相互作用和离子交换的羰基和羧基含量高，芳香结构含量低。结论是植物吸附剂中木质素的存在有助于提高染料吸附效率。