科学研究

TEMPO氧化纤维素对Pb2+的吸附性能研究

展开
  • 河北科技大学化学与制药工程学院,石家庄050018
曹猛(1994-),男,硕士研究生,主要研究方向为天然高分子材料改性,E-mail:1030869688@qq.com。

收稿日期: 2019-09-10

  修回日期: 2020-09-14

  网络出版日期: 2021-01-21

基金资助

河北省高等学校科学技术研究项目(QN2018135)

Adsorption property of TEMPO/TOC for Pb2+

Expand
  • College of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018

Received date: 2019-09-10

  Revised date: 2020-09-14

  Online published: 2021-01-21

摘要

通过采用2,2,6,6-四甲基哌啶氮氧自由基(TEMPO)/NaBr/NaClO体系来选择性催化氧化纤维素,并将制得的氧化纤维素(TOC)用于Pb2+的吸附。结果表明:TOC对Pb2+溶液吸附的最佳pH为5。不同羧基含量的TOC对于Pb2+溶液的吸附,随着羧基含量的增大,其吸附量也在增大且在一定范围内符合线性关系。对于Pb2+的吸附行为更符合Freundlich吸附等温线方程,最大饱和吸附量为138.82mg/g,循环使用性能良好;将TOC通过超声波细胞粉碎机处理纳米化,处理时间为20min时,粒度最小,纤维素吸附量/吸附率最高。

本文引用格式

曹猛, 孙玉娟, 刘洪杰, 褚晓萌, 刘少杰 . TEMPO氧化纤维素对Pb2+的吸附性能研究[J]. 化工新型材料, 2020 , 48(12) : 200 -203 . DOI: 10.19817/j.cnki.issn 1006-3536.2020.12.047

Abstract

The TEMPO/NaBr/NaClO system was used to selectively catalyze the oxidation of cellulose,and the obtained oxidized cellulose (TOC) was used for the adsorption of Pb2+.The results showed that the optimum pH of TOC adsorption on Pb2+ was 5.The adsorption capacity of TOC on Pb2+ solution increased with the increase of carboxyl content,showing a linear relationship to a certain extent.The adsorption behavior of Pb2+ was more in line with the Freundlich adsorption isotherm equation.The maximum saturated adsorption capacity was 138.82mg/g,and the cycle performance was good.The oxidized cellulose was treated by ultrasonic cell pulverizer for nanomerization.When the treatment time was 20min,the smallest particle size was obtained and the adsorption/adsorption rate of cellulose was the highest.

参考文献

[1] Saito T,Isogai A.Ion-exchange behavior of carboxylate groups in fibrous cellulose oxidized by the TEMPO-mediated system[J].Carbohydrate Polymers,2005,61(2):183-190.
[2] 孙绪兵,杜京城,由耀辉.TEMPO/NaClO/NaBr表面改性甲壳素及吸附性能研究[J].化工新型材料,2017,45(8):223-226.
[3] 桑显葵.微晶纤维素氧化改性动力学及其产物对Ag+的吸附性能研究[D].南宁:广西大学,2015.
[4] Isobe N,Chen X,Kim U J,et al.TEMPO-oxidized cellulose hydrogel as a high-capacity and reusable heavy metal ion adsorbent[J].Journal of Hazardous Materials,2013,260:195-201.
[5] 吴鹏,刘志明,李坚.TEMPO催化氧化对球形再生纤维素气凝胶阳离子吸附性能的影响[J].功能材料,2014,45(18):18031-18035.
[6] Liu P,Oksman K,Mathew A P.Surface adsorption and self-assembly of Cu(Ⅱ) ions on TEMPO-oxidized cellulose nanofibers in aqueous media[J].Journal of Colloid and Interface Science,2016,464:175-182.
[7] Ragab G H,Amin A S.Atomic absorption spectroscopic,conductometric and colorimetric methods for determination of fluoroquinolone antibiotics using ammonium reineckate ion-pair complex formation[J].Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy,2004,60(4):973-978.
[8] Socrates G.Infrared and Raman characteristic group frequencies:tables and charts[M].Wiley:New York,John Wiley & Sons,2001,235-283.
[9] Saito T,Isogai A.TEMPO-mediated oxidation of native cellulose.the effect of oxidation conditions on chemical and crystal structures of the water-insoluble fractions[J].Biomacromolecules,2004,5(5):1983-1989.
[10] 郭小锋,王三反.沸石去除废水中铅离子的研究[J].广东化工,2011,38(4):164-165.
[11] 徐朦,刘畅,周美成,等.粉末状凹凸棒土轻质滤料吸附水中铅离子研究[J].常州大学学报(自然科学版),2019,31(3):80-87.
[12] Varghese A G,Paul S A,Latha M S.Remediation of heavy metals and dyes from wastewater using cellulose-based adsorbents[J].Environmental Chemistry Letters,2019,17(2):867-877.
Options
文章导航

/