纺织学报 ›› 2020, Vol. 41 ›› Issue (07): 109-116.doi: 10.13475/j.fzxb.20190903908

• 染整与化学品 • 上一篇    下一篇

磁性氧化石墨烯/聚丙烯胺盐酸盐微胶囊在染料吸附中的应用

赵芷芪1,2, 李秋瑾1,2, 孙月静1,2, 巩继贤1,2, 李政1,2, 张健飞1,2,3()   

  1. 1.天津工业大学 纺织科学与工程学院, 天津 300387
    2.天津工业大学 先进纺织复合材料教育部重点实验室, 天津 300387
    3.山东省生态纺织协同创新中心, 山东 青岛 266071
  • 收稿日期:2019-09-12 修回日期:2020-03-23 出版日期:2020-07-15 发布日期:2020-07-23
  • 通讯作者: 张健飞
  • 作者简介:赵芷芪(1990—),女,博士生。主要研究方向为纳米材料与功能纺织材料。
  • 基金资助:
    国家重点研发计划资助项目(2017YFB0309800);国家重点研发计划资助项目(2016YFC0400503-02);天津自然科学基金项目(18JCYBJC89600);天津市应用基础及前沿技术研究计划(15JCYBJC18000);新疆维吾尔自治区重大科技专项(2016A03006-3);中国纺织工业联合会科技指导性项目(2017011)

Application of magnetic-graphene oxide/poly(allylamine hydrochloride) microcapsules for adsorption of dyes

ZHAO Zhiqi1,2, LI Qiujin1,2, SUN Yuejing1,2, GONG Jixian1,2, LI Zheng1,2, ZHANG Jianfei1,2,3()   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tiangong University, Tianjin 300387, China
    3. Collaborative Innovation Center for Eco-Textiles of Shandong Province, Qingdao, Shandong 266071, China
  • Received:2019-09-12 Revised:2020-03-23 Online:2020-07-15 Published:2020-07-23
  • Contact: ZHANG Jianfei

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摘要：

针对染整过程中产生的废水量较大,对环境造成污染的问题,通过层层自组装(LBL)的方法,利用带有相反电荷的四氧化三铁-氧化石墨烯(Fe3O4-GO)和聚丙烯胺盐酸盐(PAH)制备磁性微胶囊,用于染色废水的吸附研究。分析了Fe3O4-GO及(PAH/Fe3O4-GO)n微胶囊的形貌与化学结构。考察了(PAH/Fe3O4-GO)2微胶囊对阳离子染料亚甲基蓝的吸附行为及吸附机制。结果表明:当染料的质量浓度为0.2~3.0 mg/mL时,(PAH/Fe3O4-GO)2微胶囊对染料的吸附在20 min内可达到最大吸附量;在25 ℃,pH=12条件下,(PAH/Fe3O4-GO)2对染料的吸附率可达96.5%;Langmuir吸附等温线模型和准二级动力学模型能更好地描述(PAH/Fe3O4-GO)2微胶囊对亚甲基蓝的吸附过程,计算得到理论最大吸附量为219.996 mg/g。

关键词: 氧化石墨烯, 磁性微胶囊, 印染废水, 亚甲基蓝, 吸附性能

Abstract:

Facing the problem that printing and dyeing wastewater pollutes environment, this paper reports on hybrid magnetic microcapsules with Fe3O4-graphene oxide (Fe3O4-GO) and poly(allylamine hydrochloride) (PAH) for purifying and cleaning the wastewater during dyeing processes. These microcapsules were made through layer-by-layer (LBL) self-assembly due to the opposite charges of Fe3O4-GO and PAH. The structure and morphology of Fe3O4-GO and (PAH/Fe3O4-GO)n were characterized. Cationic methylene blue was then used to study the adsorption behaviour and mechanism of magnetic microcapsules. When methylene blue dye (0.2-3.0 mg/mL) was absorbed for 20 minutes by microcapsules, the adsorption reached maximum. Moreover, the absorption reaches maximum value at pH of 12 with an adsorption rate of 96.5%. The pseudo-second-order adsorption kinetic and Langmuir adsorption isothermal model are more suitable for describing the adsorption process of methylene blue on magnetic (PAH/Fe3O4-GO)2 microcapsules, with the theoretical maximum adsorption of 219.996 mg/g.

Key words: graphene oxide, magnetic microcapsules, dyeing wastewater, methylene blue, adsorption

中图分类号: 

  • TS195.5

图1

采用LBL法制备杂化的磁性氧化石墨烯微胶囊"

图2

Fe3O4-GO的形貌照片"

图3

磁性氧化石墨烯微胶囊的超景深三维显微镜图像"

图4

磁性氧化石墨烯微胶囊在外磁场作用下与水的分离"

图5

Fe3O4-GO微粒和(PAH/Fe3O4-GO)n微胶囊的红外光谱图"

图6

吸附剂质量对吸附性能的影响"

图7

不同初始染料质量浓度和时间条件下磁性微胶囊对亚甲基蓝的吸附"

图8

pH值对(PAH/Fe3O4-GO)2微胶囊吸附亚甲基蓝的影响"

图9

(PAH/Fe3O4-GO)2微胶囊对不同质量浓度亚甲基蓝溶液的吸附"

图10

(PAH/Fe3O4-GO)2微胶囊吸附亚甲基蓝的准一级动力学和准二级动力学吸附拟合曲线"

表1

(PAH/Fe3O4-GO)2微胶囊吸附染料的动力学模型参数"

MB质量
浓度/
(mg·mL-1)		 吸附量
测量值/
(mg·g-1)		 准一级动力学 准二级动力学
Qe/(mg·g-1) k1/min-1 R2 Qe/(mg·g-1) k2/(g·mg-1·min-1) R2
1.0 62.995 8 35.644 2 0.025 3 0.603 4 62.640 2 0.015 9 0.999 9
2.5 86.533 7 51.214 7 0.018 3 0.700 7 86.533 0 0.011 6 0.999 8

图11

(PAH/Fe3O4-GO)2微胶囊吸附亚甲基蓝的Langmuir和Freundlich吸附等温线"

表2

(PAH/Fe3O4-GO)2微胶囊吸附亚甲基蓝的等温线模型参数"

Langmuir模型 Freundlich模型
Qmax/
(mg·g-1)		 KL R2 1/n KF R2
219.996 0.422 12 0.958 21 0.849 29 5.126 48 0.947 94

表3

洗脱次数对磁性微胶囊脱附率的影响"

洗脱次数 脱附率/%
1 52
2 53
3 54
4 54
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