Page 166 - 《精细化工》2020年第4期

第 37 卷第 4 期 精 细 化 工 Vol.37, No.4
202 0 年 4 月 FINE CHEMICALS Apr. 2020

水处理技术与环境保护
萝藦绒活性炭纤维的制备及其对亚甲基蓝的吸附性能

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王邓峰，王宗乾 ，应丽丽，朱德爱
（安徽工程大学 纺织服装学院，安徽 芜湖 241000）

摘要：天然中空萝藦绒（Mj-fiber）经除蜡、磷酸活化和高温炭化工艺制备出活性炭纤维（ACF）。采用 SEM、
XRD、Roman 和 BET 对活性炭纤维微观形貌及聚集态结构进行了表征。结果表明：活性炭纤维系石墨微晶化无
2
3
序结构，具有高中空特性和多级微孔表面形貌，总孔容达 1.357 cm /g，比表面积达 1882.003 m /g。制备的活性
炭纤维可快速吸附溶液中的亚甲基蓝染料分子，吸附过程符合准二级动力学方程，吸附等温线符合 Langmuir 模
0
型，并以物理吸附为主，理论最大吸附量达 947.372 mg/g；热力学分析结果表明：吸附吉布斯自由能 ΔG <0，
0
吸附焓变 ΔH >0，表明吸附系自发过程，并与温度呈正相关；此外，染液 pH 的降低及电解质质量浓度增加均
降低了活性炭纤维对亚甲基蓝的静电引力，从而抑制吸附过程。
关键词：活性炭纤维；中空结构；亚甲基蓝；吸附；萝藦绒；水处理技术
中图分类号：X703; O647.33 文献标识码：A 文章编号：1003-5214 (2020) 04-0800-08

Preparation of activated carbon fiber based on Metaplexis japonica
seed hair fiber and its adsorption property for methylene blue

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WANG Dengfeng, WANG Zongqian , YING Lili, ZHU Deai
（School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, Anhui, China）

Abstract: An activated carbon fiber (ACF) was prepared from natural hollow Metaplexis japonica seed hair
fiber (Mj-fiber) by wax removal, phosphoric acid activation and carbonization. The micromorphology and
aggregate structure of the ACF were characterized by SEM, XRD, Roman and BET. The results
demonstrated that the as-prepared ACF exhibited graphite-like microcrystalline and disorder structure, and
possessed high hollow characteristic and surface morphology of multi-stage pores distribution, with a total
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2
pore volume and specific surface area of 1.357 cm /g and 1882.003 m /g, respectively. The ACF displayed
excellent adsorption property of methylene blue molecules in solution. The adsorption process of the ACF
for methylene blue followed the pseudo-second-order kinetic equation. The adsorption isotherm conformed
to the Langmuir model, and the physical absorption was dominant. The theoretical maximum adsorption
0
capacity was 947.372 mg/g. Furthermore, the adsorption Gibbs free energy ΔG <0 and the adsorption
0
enthalpy change ΔH >0, obtained from the results of thermodynamic analysis, indicated that the absorption
behavior was a spontaneous process and positively correlated with temperature. In addition, the decrease of
pH and the increase of electrolyte mass concentration both reduced the electrostatic attraction of ACF to
methylene blue, thus inhibiting the adsorption process.
Key words: activated carbon fiber; hollow structure; methylene blue; adsorption; Metaplexis japonica seed
hair fiber; water treatment technology

当前，印染废水作为最大水质污染源，因排污 量大、有机物含量高、色度深、难降解等特点对后

收稿日期：2019-11-02; 定用日期：2020-02-11; DOI: 10.13550/j.jxhg.20191043
基金项目：安徽省科技重大专项项目（201903a05020028）；安徽省重点研究与开发计划项目（1804a09020077）；大学生创新创业计划
项目（201810363171，201910363031）
作者简介：王邓峰（1994—），男，硕士生，E-mail：15005663302@163.com。联系人：王宗乾（1982—），男，教授，E-mail：
wzqian@ahpu.edu.cn。