稻壳生物炭对甲基橙和罗丹明B的吸附研究  

Adsorption of Methyl Orange and Rhodamine B Dyes by Rice Husk Biochar

作　　者：贺艳 黄致广 李云龙 He Yan;Huang Zhiguang;Li Yunlong(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054

出　　处：《针织工业》2025年第1期42-47,共6页Knitting Industries

基　　金：陕西省自然科学基础研究计划项目(2023JQ0294);西安科技大学教师科研启动资金(2050121032)。

摘　　要：文中以稻壳生物炭为吸附剂,系统研究其对甲基橙和罗丹明B的吸附作用及机制。结果表明,生物炭对两种染料的吸附过程均符合准二级动力学方程,表明以化学吸附为主。Langmuir模型和Freundlich模型分别能较好地描述生物炭对甲基橙和罗丹明B的吸附行为。pH值为3.0时生物炭对罗丹明B的吸附量最大。增加溶液的离子强度,促进生物炭对两种染料的吸附,而腐殖酸的存在则抑制染料的吸附。生物炭对两种染料的吸附均包含多种机制,氢键和π-π相互作用是甲基橙吸附的主要机理,而罗丹明B的吸附主要通过离子交换、氢键和π-π相互作用;同时孔隙填充和疏水作用对两种染料的吸附起一定作用。The adsorption performance and mechanism of methyl orange and rhodamine B by rice husk biochar were systematically studied in this paper.The results show that the adsorption kinetic data can be well fitted by pseudo-second-order model for both dyes,suggesting chemisorption.The Langmuir and Freundlich model can better describe the adsorption behaviors of methyl orange and rhodamine B,respectively.The maximum adsorption of rhodamine B by biochar occurred at pH value 3.0.The adsorption of the two dyes increases with increasing ionic strength of the aqueous solution,while the presence of humic acid inhibits the adsorption processes.Various mechanisms are involved in the removal of the two dyes by biochar.Hydrogen bond and r-interaction are found to be responsible for methyl orange adsorption,while the adsorption of rhodamine B is mainly through ion exchange,hydrogen bond and-interaction.In addition,the pore filling and hydrophobic interaction also plays an important role in the adsorption of the two dyes.

关 键 词：稻壳生物炭 甲基橙 罗丹明B 吸附 机理 

分 类 号：X791[环境科学与工程—环境工程]