芳砜纶气凝胶的制备及其对罗丹明B的吸附性能研究
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摘要
以芳砜纶(PSA)为原料,通过简单的溶胶-凝胶法,经冷冻干燥制备三维多孔的PSA气凝胶材料,研究了其对水相中罗丹明B染料的吸附性能,并通过吸附动力学和等温吸附模型拟合探究了吸附机理.结果表明:PSA气凝胶对罗丹明B具有良好的吸附性能,在染料初始浓度为1 000mg/L时,吸附720min可达到最佳的吸附量为113.96mg/g.其吸附过程符合准二级动力学模型和Langmuir等温线模型,表明PSA气凝胶对罗丹明B的吸附过程属于单分子层化学吸附.为PSA气凝胶的发展和应用提供一定的理论基础和科学依据.
A three-dimensional porous PSA aerogel material was prepared by freeze-drying using polysulfonamide(PSA)as raw material.The adsorption properties of Rhodamine B dye in water phase were studied,and the adsorption mechanism was explored by adsorption kinetics and isotherm model fitting.The results showed that PSA aerogels had good adsorption properties for Rhodamine B.When the initial concentration of dye was 1 000 mg/L,the best adsorption capacity was 113.96 mg/g when adsorbed 720 min.The adsorption process accords with the pseudo second-order model and the Langmuir isotherm model,which indicates that the adsorption process of Rhodamine B aerogel belongs to chemical sorption and monolayer adsorption.This study provides a theoretical basis and scientific basis for the development and application of PSA aerogels.
A three-dimensional porous PSA aerogel material was prepared by freeze-drying using polysulfonamide(PSA)as raw material.The adsorption properties of Rhodamine B dye in water phase were studied,and the adsorption mechanism was explored by adsorption kinetics and isotherm model fitting.The results showed that PSA aerogels had good adsorption properties for Rhodamine B.When the initial concentration of dye was 1 000 mg/L,the best adsorption capacity was 113.96 mg/g when adsorbed 720 min.The adsorption process accords with the pseudo second-order model and the Langmuir isotherm model,which indicates that the adsorption process of Rhodamine B aerogel belongs to chemical sorption and monolayer adsorption.This study provides a theoretical basis and scientific basis for the development and application of PSA aerogels.
引文
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[2]孙淑香,卢智敏,石风俊,等.芳砜纶纤维结构和性能的研究[J].河南科学,2013,31(2):161-164.
[3]陈卓明.功能性聚砜酰胺复合材料的制备与表征[D].上海:上海工程技术大学,2011.
[4]班燕,张玉华,任加荣.芳砜纶在耐高温滤料中的应用[J].产业用纺织品,2006(12):33-36.
[5]朱月群,杨建平,殷庆永,等.芳砜纶阻燃纱线设计[J].纺织科技进展,2008(6):27-30.
[6]叶烨,焦晓宁,柯鹏.芳砜纶绝缘纸制备的最优工艺探讨[J].产业用纺织品,2015,33(7):11-13.
[7]F.Zhu,Q.Feng,R.Liu,et,al.Pyrolysis kinetics of polysulfonamide fiber used for fire protective clothing[J].Textile Research Journal,2015,86(5):472-479.
[8]代宏哲,高续春,樊君.Ag+/g-C3N4光催化降解罗丹明B工艺优化研究[J].化工科技,2018,26(4):24-27.
[9]陈蓉,武超.超声前处理强化活性炭吸附艳红X-3B染料废水[J].环境工程学报,2013,7(7):2 447-2 452.
[10]BH.Hameed,A T.Din,A L.Ahmad.Adsorption of methylene blue onto bamboo-based activated carbon:Kinetics and equilibrium studies[J].Journal of Hazardous Materials,2007,141(3):819-825.
[11]任刚,余燕,彭素芬,等.沸石和改性沸石对孔雀绿(MG)和磺化若丹明(LR)的吸附特性[J].环境化学,2015,34(2):367-376.
[12]张金宁,宋明玉,陈昀,等.二醋酸/有机改性蒙脱土复合多孔纤维的制备及其染料吸附性能[J].化工新型材料,2018,46(9):144-147.
[13]J.Xiao,W.Lv,Y.Song,et al.Graphene/nanofiber aerogels:Performance regulation towards multiple applications in dye adsorption and oil/water separation[J].Chemical Engineering Journal,2018,338:202-210.
[14]H.Li,Y.Zhu,B.Xu,et,al.Preparation and characterization of all para-position polysulfonamide fiber[J].Journal of Applied Polymer Science,2013,127(1):342-348.
[15]W H Li,Q Y Yue,B Y Gao,et,al.Preparation and utilization of sludge-based activated carbon for the adsorption of dyes from aqueous solutions[J].Chemical Engineering Journal,2011,171(1):320-327.
[16]Wei M P,Chai H,Cao Y L,et al.Sulfonated graphene oxide as an adsorbent for removal of Pb2+,and methylene blue[J].Journal of Colloid&Interface Science,2018,524:297-305.