以原位插层共聚法制备木质纤维素-g-丙烯酸/丙烯酰胺/蒙脱土(LNC-g-AA/AM/MMT)纳米复合材料,采用X 射线衍射(XRD)、扫描电镜(SEM)对其结构进行表征。研究在金属离子初始浓度、吸附时间、吸附温度、p H 值等不同吸附条件下,LNC-g-AA/AM/MMT纳米复合材料对Pb2+、Cd2+吸附性能的影响。结果表明,当Pb2+、Cd2+初始浓度分别为0.04和0.06 mol/L,吸附时间分别为120和60 min,吸附温度分别为40和30℃,pH 值为5.5时,LNC-g-AA/AM/MMT纳米复合材料对Pb2+、Cd2+的吸附量分别高达504.2和246.9 mg/g。整个吸附过程均符合 Lang-muir吸附等温线模型和伪二级动力学模型,且是个自发放热的反应过程。同时对最佳条件下吸附饱和的LNC-g-AA/AM/MMT 纳米复合材料进行解吸研究,脱附率分别为93.4%和92.9%。
The ligoncellulose-g-acrylic acid/acrylamide/montmorillonite (LNC-g-AA/AM/MMT)nanocompos-ites were prepared by a in situ intercalated polymerization method,it was characterized by X-ray diffraction (XRD)and scanning electron microscopy (SEM).The effects of several experimental conditions including met-al ions initial concentration,adsorption time,adsorption temperature and solution pH were examined.The maximum uptake of Pb2+(504.2 mg/g)and Cd2+(246.9 mg/g)were observed when used 0.04 mol/L of Pb2+and 0.06 mol/L of Cd2+ concentration,at adsorption time of 120 and 60 min,and at adsorption temperature of 40 and 30 ℃,under pH 5.5.All absorption processes were in good agreement with the Langmuir isotherm and the Pseudo-second-order kinetic model,was a spontaneous exothermic reaction process.The desorption process showed that the maximum desorption percentage reached 93.4% and 92.9%,respectively.
参考文献
| [1] | 孟多,周立岱,于常武.水体重金属污染现状及治理技术[J].辽宁化工,2006(09):534-536,549. |
| [2] | 郭燕妮,方增坤,胡杰华,谢洪珍,李黎婷,叶志勇.化学沉淀法处理含重金属废水的研究进展[J].工业水处理,2011(12):9-13. |
| [3] | 陆朝阳,沈莉莉,张全兴.吸附法处理染料废水的工艺及其机理研究进展[J].工业水处理,2004(03):12-16. |
| [4] | 陈秀芳.离子交换法在废水处理中的应用[J].科技情报开发与经济,2004(07):148-149,155. |
| [5] | Zeng Zhenou;Zeng Yingru;Wu Hongru.Study on re-moval of copper on Jinchuan nickel electrolyte fluid purifi-cation with electro deposition[J].Hunan Metallurgy,1994(04):11-14. |
| [6] | 谢辉玲,叶红齐,曾坚贤.膜分离技术在重金属废水处理中的应用[J].化学与生物工程,2005(05):41-43,46. |
| [7] | 许怡,杜国勇,赵立志.生物法处理废水的现状与展望[J].环境技术,2004(06):40-43. |
| [8] | 姜玉,黄彩结,庞浩,廖兵.纤维素基离子吸附剂的研究进展[J].化学通报（印刷版）,2008(12):891-899. |
| [9] | 向莹,刘全校,张勇,曹国荣.蒙脱土的改性方法及应用现状[J].北京印刷学院学报,2007(04):30-33. |
| [10] | Qu Yuanzhi;Sun Jinsheng;Shu Yinao .Advances in ac-rylamide polymers nanomaterials[J].Oilfield Chemis-try,2006,23(03):273-276. |
| [11] | Wang Xiaohuan;Zheng Yian;Wang Aiqin .Fast remov-al of copper ions from aqueous solution by chitosan-g-po-ly(acrylic acid)/attapulgite composites[J].Journal of Hazardous Materials,2009,168(2-3):970-977. |
| [12] | Yi Liu;Wenbo Wang;Aiqin Wang .Adsorption of lead ions from aqueous solution by using carboxymethyl cellulose-g-poly (acrylic acid)/attapulgite hydrogel composites[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2010(1/3):258-264. |
| [13] | 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. |
| [14] | D.M.Lincoln;R.A.Vaia;Z.-G.Wang;B.S.Hsiao .Secondary structure and elevated temperature crystallite morphology of nylon-6/layered silicate nanocomposites[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(4):1621-1631. |
| [15] | 贾涓,周俊,辜小玲,曾兵.全同聚丙烯SEM分析试样的制备及观察[J].武汉科技大学学报（自然科学版）,2011(06):436-439. |
| [16] | Li Xiaoli .Preparation of novel composite adsorbents based on polymer matrix and the research on the adsorp-tion of heavy metals in aqueous solutions[D].Lanzhou:Lanzhou University,2013. |
| [17] | Zhang Juanjuan .Study on synthesis,characterization of Ca-based functional materials and their adsorption of heavy metal ions[D].Changsha:Changsha University of Science & Technology,2013. |
| [18] | Dong DM.;Li Y.;Zhang JJ.;Hua XY. .Comparison of the adsorption of lead, cadmium, copper, zinc and barium to freshwater surface coatings[J].Chemosphere,2003(5):369-373. |
| [19] | 唐雪娇,杨丽,吴丰鹏,高敏,沈伯雄.新型壳聚糖衍生物吸附剂对Ni2+的吸附行为[J].天津大学学报,2011(11):979-983. |
| [20] | Azza Khaled;Ahmed El Nemr;Amany El-Sikaily .Treatment of artificial textile dye effluent containing Direct Yellow 12 by orange peel carbon[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2009(1/3):210-232. |
| [21] | H. Demir;A. Top;D. Balkoese;S. UElkue .Dye adsorption behavior of Luffa cylindrica fibers[J].Journal of hazardous materials,2008(1/2):389-394. |
| [22] | 胡伊旭,夏璐,金帅,张博涵,王磊.改性木屑对镉铬混合离子的吸附研究[J].金属矿山,2012(03):145-148,162. |
| [23] | 郝一男 .文冠果种仁油的提取及其生物柴油合成的研究[D].内蒙古农业大学,2011. |
| [24] | 汤红仙,金加洪,陈强,张秀芹,孙小强.多胺型螯合树脂的制备及吸附性能研究[J].材料导报,2009(16):88-90,105. |
| [25] | Tang XH;Zhang XM;Guo CC;Zhou AL .Adsorption of Pb2+ on chitosan cross-linked with triethylene-tetramine[J].Chemical Engineering & Technology: Industrial Chemistry -Plant Equipment -Process Engineering -Biotechnology,2007(7):955-961. |
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