Investigation of green functionalization of multiwall carbon nanotubes and its application in adsorption of benzene, toluene & p-xylene from aqueous solution
作者： Hirra Anjum , Khairiraihanna Johari , Nirmala Gnanasundaram , Arunagiri Appusamy , Murugesan Thanabalan
DOI: 10.1016/J.JCLEPRO.2019.02.233
关键词:
摘要: Abstract The presence of benzene, toluene, and p-xylene (BTX) in an aqueous media imparts harmful effects on the ecosystem. To abate these hydrophobic contaminants, adsorption with efficient sorbent, multiwall carbon nanotubes (MWCNTs) was selected for present research. Since strong oxidizing agents cause highest degree degradation (shortening tubes), severely affect structural integrity ultimately result reduced sorption capacity. Therefore, surface MWCNTs modified a new combination green dispersants (citric acid, tartaric malic salicylic acid) characterized by area analyzer, Fourier transform infrared spectroscopy-attenuated total reflection (FTIR-ATR), Raman spectroscopy, x-ray diffraction (XRD), variable pressure field emission scanning electron microscope (VPFESEM). incorporation oxygen-bearing complexes over nanotubes, enhanced wettability that offers more active sites process. impact governing factors (BTX concentration, contact time, dosage MWCNTs, temperature, pH) systematically studied optimized using RSM technique. maximum removal efficiency oxidized (O-MWCNTs) up to 99.99% BTX. experimental data were best fitted pseudo second-order model Langmuir isotherm models. thermodynamic study depicted process spontaneous endothermic. mechanism quantitatively evaluated FTIR-ATR. successful desorption regeneration proved recycling capacity sorbent. Conclusively, presented fast BTX as compared reported existing literature.
elsevier.com
sci-hub.se 参考文章(56)
N.M. Mubarak, J.N. Sahu, E.C. Abdullah, N.S. Jayakumar, P. Ganesan, Novel microwave-assisted multiwall carbon nanotubes enhancing Cu (II) adsorption capacity in water Journal of The Taiwan Institute of Chemical Engineers. ,vol. 53, pp. 140- 152 ,(2015) , 10.1016/J.JTICE.2015.02.016
N.M. Mubarak, J.N. Sahu, E.C. Abdullah, N.S. Jayakumar, P. Ganesan, Single stage production of carbon nanotubes using microwave technology Diamond and Related Materials. ,vol. 48, pp. 52- 59 ,(2014) , 10.1016/J.DIAMOND.2014.07.005
Chungsying Lu, Fengsheng Su, Suhkai Hu, Surface modification of carbon nanotubes for enhancing BTEX adsorption from aqueous solutions Applied Surface Science. ,vol. 254, pp. 7035- 7041 ,(2008) , 10.1016/J.APSUSC.2008.05.282
W.M. Davis, C.L. Erickson, C.T. Johnston, J.J. Delfino, J.E. Porter, Quantitative Fourier Transform Infrared spectroscopic investigation humic substance functional group composition Chemosphere. ,vol. 38, pp. 2913- 2928 ,(1999) , 10.1016/S0045-6535(98)00486-X
Yan-Hui Li, Shuguang Wang, Zhaokun Luan, Jun Ding, Cailu Xu, Dehai Wu, Adsorption of cadmium(II) from aqueous solution by surface oxidized carbon nanotubes Carbon. ,vol. 41, pp. 1057- 1062 ,(2003) , 10.1016/S0008-6223(02)00440-2
P.K. Malik, Dye removal from wastewater using activated carbon developed from sawdust: adsorption equilibrium and kinetics. Journal of Hazardous Materials. ,vol. 113, pp. 81- 88 ,(2004) , 10.1016/J.JHAZMAT.2004.05.022
Irving Langmuir, THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM. Journal of the American Chemical Society. ,vol. 40, pp. 1361- 1403 ,(1918) , 10.1021/JA02242A004
Yang Yu, Bandaru N. Murthy, Joseph G. Shapter, Kristina T. Constantopoulos, Nicolas H. Voelcker, Amanda V. Ellis, Benzene carboxylic acid derivatized graphene oxide nanosheets on natural zeolites as effective adsorbents for cationic dye removal. Journal of Hazardous Materials. ,vol. 260, pp. 330- 338 ,(2013) , 10.1016/J.JHAZMAT.2013.05.041
Baohua. Gu, Juergen. Schmitt, Zhihong. Chen, Liyuan. Liang, John F. McCarthy, Adsorption and desorption of natural organic matter on iron oxide: mechanisms and models. Environmental Science & Technology. ,vol. 28, pp. 38- 46 ,(1994) , 10.1021/ES00050A007
Baoshan. Xing, William B. McGill, Marvin J. Dudas, Yadollah. Maham, Loren. Hepler, Sorption of phenol by selected biopolymers: isotherms, energetics, and polarity. Environmental Science & Technology. ,vol. 28, pp. 466- 473 ,(1994) , 10.1021/ES00052A019