磺胺化聚丙烯腈纳米纤维膜的制备及其对Cr(VI)和Pb(II)的吸附性能

doi:10.13475/j.fzxb.20180710007

纺织学报 ›› 2020, Vol. 41 ›› Issue (01): 1-7.doi: 10.13475/j.fzxb.20180710007

• 纤维材料 • 下一篇

磺胺化聚丙烯腈纳米纤维膜的制备及其对Cr(VI)和Pb(II)的吸附性能

王杰¹, 汪滨¹^,²^,³(), 杜宗玺¹, 李从举⁴, 李秀艳¹, 安泊儒¹

1.北京服装学院材料设计与工程学院, 北京 100029
2.服装材料研究开发与评价北京市重点实验室, 北京 100029
3.北京市纺织纳米纤维工程技术研究中心, 北京 100029
4.北京科技大学能源与环境工程学院, 北京 100083

收稿日期:2018-07-31 修回日期:2019-10-27 出版日期:2020-01-15 发布日期:2020-01-14
通讯作者: 汪滨
作者简介:王杰(1994—),男,硕士生。主要研究方向为静电纺丝纳米纤维。
基金资助:
国家自然科学基金项目(21274006);北京市科技计划项目(Z18110000591805);北京市教育委员会科技计划项目(KM201910012010);北京市优秀人才培养资助项目(2017000020124G089);北京服装学院人才引进计划项目(2017A-19)

Preparation of sulfonated polyacrylonitrile nanofiber membranes and adsorption capacity for Cr(VI) and Pb(II)

WANG Jie¹, WANG Bin¹^,²^,³(), DU Zongxi¹, LI Congju⁴, LI Xiuyan¹, AN Boru¹

1. School of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
2. Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing 100029, China
3. Beijing Engineering Research Center of Textile Nanofibers, Beijing 100029, China
4. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received:2018-07-31 Revised:2019-10-27 Online:2020-01-15 Published:2020-01-14
Contact: WANG Bin

摘要/Abstract

摘要：

为更好地吸附水中的Cr(VI)和Pb(II)等重金属离子,并且避免吸附材料对水体的二次污染,利用对甲基苯磺酰胺为功能化试剂,通过水热法对聚丙烯腈(PAN)纳米纤维膜进行化学改性,得到了具有吸附重金属离子功能的磺胺化PAN纳米纤维膜,并研究了该纤维膜对Cr(VI)和Pb(II)的吸附去除性能和机制。结果表明:当水热温度为125 ℃,水热时间为2.5 h时,可得到形貌良好的磺胺化PAN纳米纤维膜;磺胺化PAN纳米纤维膜对Cr(VI)的吸附符合Langmuir模型,且满足二级动力学方程,在质量浓度为50 mg/L的K₂Cr₂O₇溶液中1 h后可达到吸附平衡,吸附量为220.4 mg/g;对Pb(II)的吸附符合Freundlich吸附模型,且满足二级动力学方程,在质量浓度为50 mg/L的Pb(NO₃)₂溶液中1 h后可达到吸附平衡,吸附量为185.6 mg/g。

关键词: 静电纺丝, 聚丙烯腈, 磺胺化, 吸附性能, 污水处理

Abstract:

In order to better adsorb Cr(VI) and Pb(II) in water and avoid secondary water pollution by the adsorpting materials, polyacrylonitrile electrospun nanofiber membrane (PAN ENM) was chemically modified by reacting with p-toluenesulfonamide through the hydrothermal method, and the modified PAN ENM with the function of adsorbing heavy metal ions was successfully obtained. The removal performance and mechanism of the modified PAN ENM for adsorbing Cr(VI) and Pb(II) were studied. The results show that well-formed modified PAN ENM can be obtained through hydrothermal reaction at 125 ℃ for 2.5 h. The adsorption behavior of the modified PAN ENM for Cr(VI) conformed to the Langmuir model and the pseudo-second-order kinetics. The equilibrium adsorption was reached in 1 h and the adsorption capacity reached 220.4 mg/g in a 50 mg/L K₂Cr₂O₇ solution. The adsorption for Pb(II) fits well to the Freundlich model and the pseudo-second-order kinetics. The equilibrium adsorption is achieved in 1 h and the adsorption capacity is 185.6 mg/g in a 50 mg/L Pb(NO₃)₂ solution.

Key words: electrospinning, polyacrylonitrile, sulfamation, adsorption behavior, sewage treatment

中图分类号:

TQ340.9

王杰, 汪滨, 杜宗玺, 李从举, 李秀艳, 安泊儒. 磺胺化聚丙烯腈纳米纤维膜的制备及其对Cr(VI)和Pb(II)的吸附性能[J]. 纺织学报, 2020, 41(01): 1-7.

WANG Jie, WANG Bin, DU Zongxi, LI Congju, LI Xiuyan, AN Boru. Preparation of sulfonated polyacrylonitrile nanofiber membranes and adsorption capacity for Cr(VI) and Pb(II)[J]. Journal of Textile Research, 2020, 41(01): 1-7.

图/表 21

图1

图2

图3

图4

图5

图6

图7

表1

磺胺化PAN纳米纤维膜吸附动力学拟合结果"

吸附离子	准一级动力学吸附方程			准二级动力学吸附方程
吸附离子	q_e1/(mg·g^-1)	k₁/min^-1	$R 1 2$	q_e2/(mg·g^-1)	k₂/(g·mg^-1·min^-1)	$R 2 2$
Cr(VI)	214.86	0.09	0.972	295.85	8.67×10^-4	0.995
Pb(II)	175.91	0.05	0.978	248.76	2.10×10^-4	0.984

表1

磺胺化PAN纳米纤维膜吸附动力学拟合结果"

吸附离子	准一级动力学吸附方程			准二级动力学吸附方程
吸附离子	q_e1/(mg·g^-1)	k₁/min^-1	$R 1 2$	q_e2/(mg·g^-1)	k₂/(g·mg^-1·min^-1)	$R 2 2$
Cr(VI)	214.86	0.09	0.972	295.85	8.67×10^-4	0.995
Pb(II)	175.91	0.05	0.978	248.76	2.10×10^-4	0.984

表1

图8

图9

图10

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磺胺化聚丙烯腈纳米纤维膜的制备及其对Cr(VI)和Pb(II)的吸附性能

Preparation of sulfonated polyacrylonitrile nanofiber membranes and adsorption capacity for Cr(VI) and Pb(II)

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