SDS改性壳聚糖对Cu(Ⅱ)的吸附研究
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摘要
利用SDS(十二烷基磺酸钠)对壳聚糖进行改性,用于吸附水中的Cu(Ⅱ)。阐述了p H、初始吸附浓度、吸附时间以及温度等对吸附的影响。结果表明,在p H=5. 5时吸附效果最佳;对Cu(Ⅱ)的吸附过程在30 min达到平衡,最大吸附量为219. 22 mg/g;温度对材料的吸附量的影响较小。此方法比用CS材料达到平衡时间缩短3. 5 h,最大吸附量增加近1倍。表明通过此方法改性壳聚糖能有效的提高材料对Cu(Ⅱ)的吸附速率和吸附量。红外表征结果表明,SDS的磺酸根离子与CS中的羟基(—OH)进行了结合。
The chitosan was modified by SDS( sodium dodecyl sulfonate). The effects of pH,initial adsorption concentration,adsorption time and temperature on the adsorption process were described. The results show that the adsorption effect is the best when pH = 5. 5. The adsorption equilibrium achieved in30 min,maximum adsorption quantity of Cu( Ⅱ) is 219. 22 mg/g; At the same time,the influence of temperature on the material of the adsorption is small. Compare with CS,this method shortens the balance time by 3. 5 h and increases the maximum adsorption amount by nearly one time. It shows that this modification can greatly improve the adsorption rate and adsorption capacity of this material. The FTIR results showed that the sulfonate ions of SDS were combined with hydroxyl( —OH) in chitosan.
The chitosan was modified by SDS( sodium dodecyl sulfonate). The effects of pH,initial adsorption concentration,adsorption time and temperature on the adsorption process were described. The results show that the adsorption effect is the best when pH = 5. 5. The adsorption equilibrium achieved in30 min,maximum adsorption quantity of Cu( Ⅱ) is 219. 22 mg/g; At the same time,the influence of temperature on the material of the adsorption is small. Compare with CS,this method shortens the balance time by 3. 5 h and increases the maximum adsorption amount by nearly one time. It shows that this modification can greatly improve the adsorption rate and adsorption capacity of this material. The FTIR results showed that the sulfonate ions of SDS were combined with hydroxyl( —OH) in chitosan.
引文
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[3]张帆,李菁,谭建华,等.吸附法处理重金属废水的研究进展[J].化工进展,2013,32(11):2749-2756.
[4]Liu T,Wang Z L,Zhao L,et al.Enhanced chitosan/Fe0-nanoparticles beads for hexavalent chromium removal from wastewater[J].Chemical Engineering Journal,2012,189/190(2):196-202.
[5]Crini G.Non-conventional low-cost adsorbents for dye removal:a review[J].Bioresource Technology,2006,97(9):1061-1085.
[6]张艺钟,刘珊,刘志文,等.壳聚糖凝胶球对Cu(Ⅱ)和Cr(Ⅵ)吸附行为的对比[J].化工进展,2017,36(2):712-719.
[7]姚瑞华,孟范平,张龙军,等.改性壳聚糖对重金属离子的吸附研究和应用进展[J].材料导报,2008,22(4):65-70.
[8]Guibal E.Interactions of metal ions with chitosan-based sorbents:a review[J].Separation&Purification Technology,2004,38(1):43-74.
[9]Chatterjee S,Chatterjee T,Woo S H.A new type of chitosan hydrogel sorbent generated by anionic surfactant gelation[J].Bioresource Technology,2010,101(11):3853-3858.
[10]Han W,Liu C,Bai R.A novel method to prepare high chitosan content blend hollow fiber membranes using a nonacidic dope solvent for highly enhanced adsorptive performance[J].Journal of Membrane Science,2007,302(1/2):150-159.
[11]Adeli M,Yamini Y,Faraji M.Removal of copper,nickel and zinc by sodium dodecyl sulphate coated magnetite nanoparticles from water and wastewater samples[J].Arabian Journal of Chemistry,2012(10):S514-S521.
[12]Ngah W S W,Endud C S,Mayanar R.Removal of copper(II)ions from aqueous solution onto chitosan and crosslinked chitosan beads[J].Reactive&Functional Polymers,2002,50(2):181-190.
[13]杨虎城,龚继来,曾光明.掺杂聚乙烯醇的壳聚糖小球对铜离子-腐殖酸的单一和连续吸附行为[J].环境科学学报,2017,37(10):3735-3745.
[14]Yan H,Dai J,Yang Z,et al.Enhanced and selective adsorption of copper(II)ions on surface carboxymethylated chitosan hydrogel beads[J].Chemical Engineering Journal,2011,174(2):586-594.
[15]周利民,王一平,黄群武,等.改性磁性壳聚糖微球Cu2+、Cd2+和Ni2+的吸附性能[J].物理化学学报,2007,23(12):1979-1984.
[16]Zhang S,Zhou Y F,Nie W Y,et al.Preparation of Fe3O4/chitosan/poly(acrylic acid)composite particles and its application in adsorbing copper ion(II)[J].Cellulose,2012,19(6):2081-2091.
[17]Borsagli F G L M,Mansur A A P,Chagas P,et al.O-carboxymethyl functionalization of chitosan:Complexation and adsorption of Cd(II)and Cr(VI)as heavy metal pollutant ions[J].Reactive&Functional Polymers,2015,97:37-47.
[18]Zhang X,Yin H,Cheng X,et al.Modifying effects of polyethylene glycols and sodium dodecyl sulfate on synthesis of Ni nanocrystals in 1,2-propanediol[J].Applied Surface Science,2006,252(23):8067-8072.