利用紫外光接枝的方法,快速在纤维素纳米晶须(CNW)的表面接枝丙烯酸(AA),通过红外谱图(FT-IR)、核磁共振(NMR)等测试验证了接枝的成功,利用电导滴定测得接枝率为20．04％.透射电镜(TEM)观察到接枝前后颗粒均为纳米级的晶须.研究了接枝产物 CNW-g-AA 对 Cu2＋的吸附性能,考察了吸附时间、p H 值、吸附温度和Cu2＋初始浓度对吸附实验的影响.实验最佳吸附条件为吸附温度30℃、p H 值为4、吸附时间为7 h,且最大吸附量可达到66 mg/g；同时该吸附剂经6次吸附-脱附循环后,吸附量仅降低15％.该吸附行为符合 Langmuir准二级动力学模型.
Acrylic acid (AA)was fast grafted onto cellulose nanowhiskers (CNW)surface by UV-initiation.The characterization methods,such as infrared spectrum (FT-IR)and 13 C-CP/MAS nuclear magnetic resonance (NMR),proved the successful grafting experiments.The graft yield of 20.04% was calculated by the conducto-metric titration method.TEM images showed that both CNW and CNW-g-AA had nano diameters.The adsorp-tion property of CNW-g-AA for copper ions was researched.The effects of adsorption time,pH value,tempera-ture and Cu2+ initial concentration were studied.The optimum conditions for Cu2+ adsorption was obtained when the adsorption temperature was 30 ℃,the pH value was 4 and the adsorption time was 7 h.The maxi-mum adsorption capacity was about 6 6 mg/g.After six adsorption-desorption cycles,the adsorption capacity de-creased only 1 5%.The Langmuir equation and the pseudo-second order kinetic could be fitted for the Cu2+ ad-sorption on CNW-g-AA.
参考文献
| [1] | S. Mohan;G. Sreelakshmi .Fixed bed column study for heavy metal removal using phosphate treated rice husk[J].Journal of hazardous materials,2008(1/2):75-82. |
| [2] | 曲荣君,孙向荣,王春华,孙昌梅,成国祥.纤维素基吸附剂的研究进展[J].林产化学与工业,2004(03):102-106. |
| [3] | 史艳茹,薛振华,王喜明,王丽,王爱勤.木质纤维素-g-丙烯酸/蒙脱土水凝胶制备及吸附性能研究[J].功能材料,2013(04):502-506. |
| [4] | Randall J M;William Reuter F;Waiss Jr A C .Removal of cupric ion from solution by contact with peanut skins[J].Journal of Applied Polymer Science,1975,19(06):1563-1571. |
| [5] | Seki K;Saito N;Aoyama M .Removal of heavy metal ions from solutions by coniferous barks[J].WOOD SCIENCE AND TECHNOLOGY,1997,31(06):441-447. |
| [6] | Gang Sun;Weixing Shi .Sunflower Stalks as Adsorbents for the Removal of Metal Ions from Wastewater[J].Industrial & Engineering Chemistry Research,1998(4):1324-1328. |
| [7] | Zhao BX;Wang P;Zheng T;Chen CY;Shu J .Preparation and adsorption performance of a cellulosic-adsorbent resin for copper(II)[J].Journal of Applied Polymer Science,2006(6):2951-2956. |
| [8] | My Ahmed Said Azizi Saimir;Fannie Alloin;Alain Dufresne .Review of Recent Research into Cellulosic Whiskers,Their Properties and Their Application in Nanocomposite Field[J].Biomacromolecules,2005(2):612-626. |
| [9] | XIANG Ting,ZHANG ZuLei,LIU HaiQing,YIN ZhengZhi,LI Lei,LIU XiaoMing.Characterization of cellulose-based electrospun nanofiber membrane and its adsorptive behaviours using Cu(Ⅱ), Cd(Ⅱ), Pb(Ⅱ) as models[J].中国科学:化学（英文版）,2013(05):567-575. |
| [10] | Xiaolin Yu,Shengrui Tong,Maofa Ge,Lingyan Wu,Junchao Zuo,Changyan Cao,Weiguo Song.Adsorption of heavy metal ions from aqueous solution by carboxylated cellulose nanocrystals[J].环境科学学报（英文版）,2013(05):933-943. |
| [11] | Xie, K.;Jing, L.;Zhao, W.;Zhang, Y. .Adsorption removal of Cu~(2+) and Ni~(2+) from waste water using nano-cellulose hybrids containing reactive polyhedral oligomeric silsesquioxanes[J].Journal of Applied Polymer Science,2011(5):2864-2868. |
| [12] | Kubota H;Suzuki S .Comparative examinations of reac-tivity of grafted celluloses prepared by UV-and ceric salt-initiated graftings[J].European Polymer Journal,1995,31(08):701-704. |
| [13] | 周刘佳 .纳米纤维素晶须表面丙烯酸接枝改性[D].广州:华南理工大学,2011. |
| [14] | 陈丽华.改性纤维素吸附剂的制备及其对重金属离子的吸附[J].中国新技术新产品,2009(12):6. |
| [15] | Hashem A .Amidoximated Sunflower Stalks(ASFS)as a new adsorbent for removal of Cu2+)from aqueous solu-tion[J].POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING,2006,45(01):35-42. |
| [16] | Gurgel LVA;Junior OK;Gil RPDF;Gil LF .Adsorption of Cu(II), Cd(II), and Pb(II) from aqueous single metal solutions by cellulose and mercerized cellulose chemically modified with succinic anhydride[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2008(8):3077-3083. |
| [17] | O'Connell DW;Birkinshaw C;O'Dwyer TF .A chelating cellulose adsorbent for the removal of Cu(II) from aoueous solutions[J].Journal of Applied Polymer Science,2006(6):2888-2897. |
| [18] | 罗均,葛静微,杨晓波,李小定.改性柚皮纤维素对Pb~（2+）的吸附动力学研究[J].食品科学,2010(03):87-90. |
| [19] | 张忠忠 .纤维素基吸附剂对水中Pb2+的吸附性能研究[D].天津大学,2012. |
| [20] | 张佳珺 .球形纤维素吸附剂的制备及其性能研究[D].广州:华南理工大学,2011. |
| [21] | Nakamura S;Amano M;Saegusa Y et al.Preparation of aminoalkyl celluloses and their adsorption and desorp-tion of heavy metal ions[J].Journal of Applied Polymer Science,1992,45(02):265-271. |
| [22] | Liu MH.;Deng Y.;Zhan HY.;Zhang XS. .Adsorption and desorption of copper(II) from solutions on new spherical cellulose adsorbent[J].Journal of Applied Polymer Science,2002(3):478-485. |
| [23] | Xiaomin Li;Yanru Tang;Zhexian Xuan .Study on the preparation of orange peel cellulose adsorbents and biosorption of Cd2+ from aqueous solution[J].Separation and Purification Technology,2007(1):69-75. |
| [24] | Dao Zhou;Lina Zhang;Jinping Zhou;Shenlian Guo .Cellulose/chitin beads for adsorption of heavy metals in aqueous solution[J].Water research: A journal of the international water association,2004(11):2643-2650. |
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