Enhanced photocatalytic reaction and mechanism for treating cyanide-containing wastewater by silicon-based nano-titania
作者： Yang Zhang , Yali Zhang , Yaoguo Huang , Xia Chen , Hongyou Cui
DOI: 10.1016/J.HYDROMET.2020.105512
关键词:
摘要: Abstract The treatment of cyanide-containing wastewater is very important for the sustainable development gold industry. Treating by nano-titania (nano-TiO2) has advantage adsorbing heavy metals and catalyzing decomposition cyanogen simultaneously. Since catalysis limited solid-liquid diphase system, photocatalytic adsorption efficiency relatively low. This study aimed to enhance catalytic process based on silicon-based nano-TiO2 composite functional material treat deeply wastewater. characteristics were studied Brunner−Emmet−Teller (BET) field emission scanning electron microscopy (FESEM)/ energy dispersive spectrometer (EDS), which indicated that excellent dispersibility large specific surface area(146.6±2.4 m2·g−1). Further, comparison effects cyanide with pure demonstrates latter more effective degradation. Almost 99.8% degradation was achieved under light irradiation within 135 min. mechanism X-ray photoelectron spectroscopy (XPS) analysis. It found final decompositions Copper complex zinc are CO2, NO2, Cu2+ Zn2+.
sci-hub.st 参考文章(57)
Jun Mei, Long Zhang, Anchoring High-dispersed MnO2 Nanowires on Nitrogen Doped Graphene as Electrode Materials for Supercapacitors Electrochimica Acta. ,vol. 173, pp. 338- 344 ,(2015) , 10.1016/J.ELECTACTA.2015.05.064
Sergio Hanela, Jorge Durán, Silvia Jacobo, Removal of iron–cyanide complexes from wastewaters by combined UV–ozone and modified zeolite treatment Journal of environmental chemical engineering. ,vol. 3, pp. 1794- 1801 ,(2015) , 10.1016/J.JECE.2015.06.023
Sumanta Sahoo, Seok-Hu Bae, Yun-Sung Lee, Jung-Min Lee, Joon-Mo Ahn, Chun-Gon Kim, Il-Kwon Oh, Defect-engineered mesoporous ternary nanoarchitecture of zinc-cobalt-oxide/nitrogen-doped graphene as anode material in lithium ion batteries Carbon. ,vol. 94, pp. 455- 463 ,(2015) , 10.1016/J.CARBON.2015.07.024
Shuang Song, Fangyue Hong, Zhiqiao He, Qiaolan Cai, Jianmeng Chen, AgIO3-modified AgI/TiO2 composites for photocatalytic degradation of p-chlorophenol under visible light irradiation joint international conference on information sciences. ,vol. 378, pp. 159- 166 ,(2012) , 10.1016/J.JCIS.2012.04.020
Luisa M. Pastrana-Martínez, Sergio Morales-Torres, Athanassios G. Kontos, Nikolaos G. Moustakas, Joaquim L. Faria, José M. Doña-Rodríguez, Polycarpos Falaras, Adrián M.T. Silva, TiO2, surface modified TiO2 and graphene oxide-TiO2 photocatalysts for degradation of water pollutants under near-UV/Vis and visible light Chemical Engineering Journal. ,vol. 224, pp. 17- 23 ,(2013) , 10.1016/J.CEJ.2012.11.040
Elham S Baeissa, None, Photocatalytic removal of cyanide by cobalt metal doped on TiO2–SiO2 nanoparticles by photo-assisted deposition and impregnation methods Journal of Industrial and Engineering Chemistry. ,vol. 20, pp. 3761- 3766 ,(2014) , 10.1016/J.JIEC.2013.12.076
Mike Adams, Rick Lawrence, Mike Bratty, Biogenic sulphide for cyanide recycle and copper recovery in gold–copper ore processing Minerals Engineering. ,vol. 21, pp. 509- 517 ,(2008) , 10.1016/J.MINENG.2008.02.001
ES Baeissa, None, Synthesis and characterization of sulfur-titanium dioxide nanocomposites for photocatalytic oxidation of cyanide using visible light irradiation Chinese Journal of Catalysis. ,vol. 36, pp. 698- 704 ,(2015) , 10.1016/S1872-2067(14)60320-X
Joanna S. Stevens, Lauren K. Newton, Cherno Jaye, Christopher A. Muryn, Daniel A. Fischer, Sven L. M. Schroeder, Proton Transfer, Hydrogen Bonding, and Disorder: Nitrogen Near-Edge X-ray Absorption Fine Structure and X-ray Photoelectron Spectroscopy of Bipyridine–Acid Salts and Co-crystals Crystal Growth & Design. ,vol. 15, pp. 1776- 1783 ,(2015) , 10.1021/CG5018278
C. Karunakaran, V. Rajeswari, P. Gomathisankar, Antibacterial and photocatalytic activities of sonochemically prepared ZnO and Ag–ZnO Journal of Alloys and Compounds. ,vol. 508, pp. 587- 591 ,(2010) , 10.1016/J.JALLCOM.2010.08.128