Removal of acetylsalicylic acid (ASA) in packed microcolumns with carbon xerogel modified with TiO2 nanoparticles

Author:

Gomez Rengifo Viviana Eloisa,Herrera Barros Adriana,Sanchez Toro Jorge Hernan

Abstract

The adsorption capacity of acetylsalicylic acid was evaluated using carbon xerogel (CX) and carbon xerogel modified with TiO2 nanoparticles (CXM). These materials were characterized by different techniques such as Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Fourier Transform Infrared (FTIR) spectroscopy. BET surface area measurements found values of 762 m2/g and 214 m2/g for CX and CXM, respectively. Batch experiments show that the Langmuir-Freundlich model best represents the experimental adsorption isotherm, in addition to show a maximum adsorption capacity of 17,48 mg/g.  In continuous experiments, the effect of the inlet concentration and flow rate on the adsorption capacity of the micro-packed bed adsorber were evaluated. Breakthrough curves agree well with the axial dispersion model. In view of their adsorption capacity, carbon xerogels provide a potential material for the removal of emergent contaminants from the pharmaceutical industry. Besides, the incorporation of TiO2 nanoparticles allows the implementation of complementary techniques, e.g. photodegradation, as an alternative to achieve higher elimination of aqueous contaminants.

Publisher

Universidad Nacional de Colombia

Subject

General Engineering,Building and Construction

Reference33 articles.

1. Alvarez, S., Ribeiro, R. S., Gomes, H. T., Sotelo, J. L.,and García, J. (2015). Synthesis of carbon xerogelsand their application in adsorption studies of caffeineand diclofenac as emerging contaminants.ChemicalEngineering Research and Design, 95, 229-238. DOI: 10.1016/j.cherd.2014.11.001Arango

2. Cárdenas, D. I. (2015). Evaluación del proceso de adsorciónde 2,4 diclorofenol en microtubos empacados concarbón activado. (Undergraduate thesis, UniversidadPontificia Bolivariana). Retrieved from: https://repository.upb.edu.co/bitstream/handle/20.500.11912/2483/Trabajo%20final%20-%20Daniel%20I%20Arango20C.pdf?sequence=1

3. Bailón-García, E., Elmouwahidi, A., Álvarez, M. A., Carrasco-Marín, F., Pérez-Cadenas, A. F., and Maldonado-Hódar,F. J. (2017). New carbon xerogel-tio2 composites withhigh performance as visible-light photocatalysts for dyemineralization.Applied Catalysis B: Environmental, 201,29-40. DOI: 10.1016/j.apcatb.2016.08.015

4. Beninati, S., Semeraro, D., and Mastragostino, M. (2008).Adsorption of paracetamol and acetylsalicylic acidonto commercial activated carbons.Adsorption Science& Technology, 26(9), 721-734. DOI: 10.1260/026361708788251349

5. Bitar Castro, N. M., and Mejía Meza, R. J. (2015). Adsorciónde níquel y cadmio usando cáscaras de limón y naranjamodificadas con nanopartículas de dióxido de titanio yal ́umina. (Unpublished Undergraduate thesis, Universidadde Cartagena). Cartagena, Colombia.

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3