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| 下载次数 | 被引频次 | 阅读次数 |
用锆氧基离子与果胶反应制得果胶锆凝胶球,采用扫描电镜和红外光谱初步表征了凝胶球的结构,并测定了凝胶球的机械强度。研究了该凝胶球对苯甲酸的吸附性能。分别考察了果胶浓度、锆氧基离子浓度、吸附时间、p H值、温度及苯甲酸浓度对吸附性能的影响。结果表明,在298K下,果胶锆凝胶球对苯甲酸的吸附在4.5h左右达到平衡,当果胶的质量分数为3.0%,锆氧基离子质量分数为1.0%,苯甲酸初始浓度为500mg/L,吸附量可达73.89mg/g。所研究的吸附体系既适用于Freundlich方程,又适用于Langmuir方程;吸附过程为自发的放热、熵减过程,降低温度对吸附更有利。
Abstract：Pectin zirconium gel microsphere was synthesized by crosslinking pectin with zirconium oxygen ion, and characterized by scanning electron microscopy, Fourier transform infrared spectra and mechanical strength. The adsorption performance of pectin zirconium gel microsphere for benzoic acid was investigated. The influence of several parameters, such as adsorption time, p H, pectin concentration, zirconium oxygen ion concentration, temperature and benzoic acid concentration, on adsorption capacity were studied. The results showed that the adsorption equilibrium could be established in about 4.5h at 298 K. The adsorption capacity of 73.89mg/g was achieved when the concentration of benzoic acid was 500mg/L, the mass ratio of pectin was 3.0%, and the mass ratio of Zr O2+ was 1.0%. The adsorption system could be described by either Freundlich equation or Langmuir equation. The adsorption was a spontaneously exothermic process with entropy decreasing. Lower temperature was favourable for the adsorption.
[1]Wang B,Liao L M,Huang Q H,Chen Y G.Adsorption behaviors of benzonic acid by carboxyl methyl konjac glucomannan gel microspheres cross-linked with Fe3+.Journal of Chemical Engineering Data[J].2012,57(6):72-77.
[2]刘总堂,孙玉凤,施卫忠,等.单宁酸修饰的吸附树脂对对甲苯胺和对氯苯胺的吸附行为.高分子材料科学与工程[J].2013,29(3):47-50.
[3]赵振国.硅胶自非极性溶剂中吸附苯甲酸.离子交换与吸附[J].2000,16(5):400-405.
[4]Franz M,Arafat H A,Pinto N G.Effect of chemical surface heterogeneity on the adsorption mechanism of dissolved aromatics on activated carbon.Carbon[J].2000,38(13):1807-1819.
[5]Chern J M,Chien Y W.Adsorption isotherms of benzoic acid onto activated carbon and breakthrough curvesn fixed-bed columns.Industrial&Engineering Chemistry Research[J].2001,17(40):3775-3780.
[6]刘福强,陈金龙,李爱民,等.超高交联吸附树脂对苯甲酸的吸附研究.离子交换与吸附[J].2002,18(6):522-528.
[7]刘福强,陈金龙,葛俊杰,等.吸附树脂对苯甲酸的吸附动力学研究.环境科学与技术[J].2004,27(6):3-6.
[8]代允,巫炜宁,朱立,等.NKA-II型树脂对邻氯苯甲酸的吸附研究.污染防治技术[J].2010,23(1):11-14.
[9]唐树和,陈红梅,成娴.几种吸附树脂对硝基化合物吸附性能的研究.离子交换与吸附[J].2003,19(2):147-154.
[10]邢东阳,夏彩芬,陈炳稔.电位法研究外加盐对壳聚糖树脂吸附苯甲酸的影响.华南师范大学学报(自然科学版)[J].2004,(3):91-95.
[11]陈熠,熊远福,文祝友,等.果胶提取技术研究进展.中国食品添加剂[J].2009,(3):80-84.
[12]汪多仁.果胶的开发与应用进展.饮料工业[J].2011,14(11):8-13.
[13]谢峰,王碧,刘义武,等.一种利用酶法从柠檬皮渣中提取果胶的方法[P].CN103232555A,2013-08-07.
[14]Debbaudt A,Zaba M,Ferrira M L,Gschaider M E.Theoretical and experimental study of Pb2+and Hg2+adsorption on biopolymers,2.Experimental part.Macromolecular Bioscience[J].2001,1(6):249-257.
[15]赵艳,李凤亭,鲁敏.果胶在水处理中的研究进展.环境保护科学[J].2006,32(2):19-24.
[16]Schiewer S,Patil S B.Pectin-rich fruit wastes as biosorbents for heavy metal removal:Equilibrium and kinetics.Bioresource Technology[J].2008,99(6):1896-1903.
[17]王喜洋.果胶修饰的磁性纳米材料吸附剂的制备及其去除重金属的研究[D].长沙:湖南大学,2012.
[18]王杰,蒋淑儒,陈峻峰,等.不同量果胶修饰纳米Fe及吸附水中As的研究.广州化工[J].2013,41(13):121-123.
[19]陈维璞,张恩浩,林永波.海藻酸钠-钙-铁凝胶球对Cr2O72-吸附的研究.环境保护科学[J].2010,36(2):14-16.
[20]康全影,马丽,刘雄民,等.苯甲醛、苯甲酸的紫外光谱特性及含量测定方法研究.应用化工[J].2007,36(3):295-297.
[21]李立清,梁鑫,石瑞,等.酸改性活性炭对甲苯、甲醇的吸附性能.化工学报[J].2013,64(3):970-979.
基本信息:
DOI：10.16026/j.cnki.iea.2015010064
中图分类号:O647.3
引用信息:
[1]黄辉,刘义武,邱胜红,等.果胶锆凝胶球对苯甲酸的吸附性能研究[J].离子交换与吸附,2015,31(01):64-73.DOI:10.16026/j.cnki.iea.2015010064.
基金信息:
四川省科技厅应用基础项目(2013JY0079)
2015-02-20
2015-02-20