2,2′-二吡啶胺功能化多壁碳纳米管吸附富集-原子吸收光谱法测定水中痕量铜
AAS Determination of Copper in Water After Enrichment by Adsorption on Bipyridylamine-Functionalized Multi-wall Carbon Nanotubes
摘 要
采用二氯亚砜对羧基化多壁碳纳米管进行改性,用2,2′-二吡啶胺对其表面进行修饰,得到新型吸附材料2,2′-二吡啶胺功能化多壁碳纳米管(MWCNT-Dipy),对其结构及其对水中铜离子的吸附性能进行了研究.结果表明:当介质的pH值为6时,振荡吸附15 min达到平衡,饱和吸附容量为3.2 mg·g-1,吸附在2,2′-二吡啶胺功能化多壁碳纳米管上的铜(Ⅱ)可用1.0 mol·L-1盐酸溶液6 mL完全洗脱,用原子吸收光谱法测定此洗脱液中铜(Ⅱ)的含量.方法用于纯净水中痕量铜(Ⅱ)的吸附富集和测定,加标回收率在94.3%~96.9%之间.
2,2′-二吡啶胺
铜(Ⅱ)
吸附富集
Multi-wall carbon nanotubes
2,2′-Bipyridylamine
Cu2+-ion
Adsorption enrichment
Abstract
The intermediate of acyl-chlorinated multi-wall carbon nanotubes (MWCNT′s) was prepared by the modification reaction of carboxylated MWCNT′s with SOCl2,and the object material,2,2′-bipyridylamine functionalized MWCNT′s (MWCNT-Dipy) were prepared by the reaction with 2,2′-bipyridylamine in DMF medium.Structure of the MWCNT-Dipy and its adsorptivity toward Cu2+-ion in water were studied in detail.In an aqueous medium of pH 6,the MWCNT-Dipy behaved to adsorb Cu2+-ion strongly and equilibrium of adsorption was achieved by shaking with MWCNT-Dipy for 15 min,and the adsorptive capacity of Cu2+-ion at equilibrium was 3.2 mg·g-1.The Cu2+-ion adsorbed on the surface of MWCNT-Dipy was completed desorbed by shaking with 6 mL of 1.0 mol·L-1 HCl solution,in which the copper content was determined by AAS.Recovery was tested on samples of pure water by standard addition method,giving results of recovery in the range of 94.3%-96.9%.
中图分类号 O657.31
所属栏目 试验与研究
基金项目 中国博士后自然基金(20080440646);国家“十一五”科技支撑计划(2008BAJ08B13);浙江省自然科学基金(Y406341)
收稿日期 2009/9/4
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备注刘珊(1987-),女,江西人,硕士研究生,从事功能材料开发研究.
引用该论文: LIU Shan,CUI Guo-wei,HU Zhang-jun,WANG Xiao-ping,ZHENG Wei-xin,LI Tian. AAS Determination of Copper in Water After Enrichment by Adsorption on Bipyridylamine-Functionalized Multi-wall Carbon Nanotubes[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2010, 46(5): 471～474
刘珊,崔国崴,胡张军,王筱平,郑卫新,李田. 2,2′-二吡啶胺功能化多壁碳纳米管吸附富集-原子吸收光谱法测定水中痕量铜[J]. 理化检验－化学分册, 2010, 46(5): 471～474
被引情况:
【1】冒爱荣,许琦,李红波,仓辉,郁桂云, "淀粉黄原酸酯富集-火焰原子吸收光谱法测定水中痕量铜",理化检验－化学分册 48, 987-988(2012)
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参考文献
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【2】周娟,颜增光,汤清波,等.几种典型土壤中铜对赤子爱蚯蚓的毒性差异比较研究[J].环境毒理学报,2008,3(4):394-402．
【3】PETRAUSKIENE L.Effects of novel environment on rainbow troutexposed o copper[J].Acta Zoologica Lituanica Hydrobiologia,1999,9(2):95-102．
【4】林芳,贾新刚,秦磊,等.壳聚糖-Cu(Ⅱ)吸附条件的优化[J].中国皮革,2008,37(3):29-33．
【5】GUO Yong,DIN Bing-jun,LIU Yong-wen,et al.Preconcentration of trace metals with 2-(methythio)aniline-functionalized XAD-2 and their determination by flame atomic absorption spectrometry[J].Analytia Chimica Acta,2004(504):319-324．
【6】赵黔榕,刘应隆,李璧玉,等.改性硅藻土对Cu(Ⅱ)的吸附性能的研究[J].云南师范大学学报,2000,20(6):55-57．
【7】LI Zhen-hua,CHANG Xi-jun,ZOU Xiao-jun.Solid-phase extraction of trace Cu(Ⅱ) Fe(Ⅲ) and Zn(Ⅱ) with silica gel modified with curcumin from biological and nature water samples by ICP-OES[J].Microchemical Joumal,2007(86):189-194．
【8】宋来洲,董春艳,张尊举,等.聚丙烯酸-聚偏氟乙烯树脂对Cu(Ⅱ)的吸附性能[J].中国环境科学,2003,28(3):322-326．
【9】朱长纯.碳纳米管及其应用[J].化工管理,2002(2):27-27．
【10】徐中辉,汪峰.单壁碳纳米管吸附酞菁类有机物的研究[J].物理实验,2008,28(12):16-20．
【11】MUSTAFA T A,SOYLAK M.Multiwalled carbon nanotubes for speciation of chromium in environmental samples[J].Journal of Hazardous Materials,2007,147:219-225．
【12】STAFIEJ A,PYRZYNSKA K.Solid phase extraction of metal ions using carbon nanotubes[J].Microchemical Journal,2008,89:29-33．
【13】SINNER F,BUCHMEISER M R,TESSADRI R,et al.Dipyridyl amide-functionalized polymers prepared by ring-opening-metathesis polymerization (ROMP) for the selective extraction of mercury and palladium[J].Journal of the American Chemical Society,1998,120:2790-2797．
【14】LIU Yue,LI Yan,YAN Xiu-ping.Preparation,characterization,and application of L-cysteine functionalized multiwalled carbon nanotubes as a selective sorbent for separation and preconcentration of heavy metals[J].Advance Functional Material,2008,18:1536-1543．
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