Journal ArticleDOI
Adsorption of Fluoride from Water Solution on Bone Char
Nahum Andrés Medellín-Castillo,Roberto Leyva-Ramos,Raúl Ocampo-Pérez,Ramon F. Garcia De La Cruz,Antonio Aragón-Piña,Jose M. Martinez-Rosales,R.M. Guerrero-Coronado,Laura Fuentes-Rubio +7 more
TLDR
In this article, the effects of solution pH and temperature on the adsorption of fluoride onto bone char made from cattle bones were investigated, and it was found that the maximum adaption took place at pH 3.Abstract:
The effects of solution pH and temperature on the adsorption of fluoride onto bone char made from cattle bones were investigated in this work. It was found that the maximum adsorption took place at pH 3 and the adsorption capacity decreased nearly 20 times augmenting the pH from 3 to 12. This behavior was attributed to the electrostatic interactions between the surface of bone char and the fluoride ions in solution. The adsorption capacity was not influenced by temperature in the range from 15 to 35 °C. A comparison of fluoride adsorption capacities among several adsorbents revealed that the adsorption capacity of the bone char was 2.8 and 36 times greater than those of a commercial activated alumina (F-1) and a commercial activated carbon (F-400). The adsorption capacity is considerably dependent upon the physicochemical properties of the bone char surface and the solution pH.read more
Citations
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Experimental Design of Photo-Fenton Reactions for the Treatment of Car Wash Wastewater Effluents by Response Surface Methodological Analysis
Maha A. Tony,Zeinab Bedri +1 more
TL;DR: In this article, a factorial design based on the response surface methodology was applied to optimize the photo-Fenton oxidation process conditions using chemical oxygen demand (COD) reduction as the target parameter to optimize.
Journal ArticleDOI
Coupling UV irradiation and electrocoagulation for reclamation of urban wastewater
Salvador Cotillas,Javier Llanos,Oscar G. Miranda,Gerardo C. Díaz-Trujillo,Pablo Cañizares,Manuel A. Rodrigo +5 more
TL;DR: In this article, the effect of current density on process performance was evaluated, finding a synergistic interaction of both techniques at low current density (1.44 ǫm−2) but an antagonistic effect at higher values of current densities (7.20 a m−2), caused by the less efficient transmission of UV irradiation to the bulk solution due to the increase in the concentration of solids.
Journal ArticleDOI
Nickel supported on zinc oxide nanowires as advanced hydrodesulfurization catalysts
Franz G. Petzold,Jacek B. Jasinski,Ezra L. Clark,Jeong H. Kim,Jason Absher,Helge Toufar,Mahendra K. Sunkara +6 more
TL;DR: In this paper, a zinc oxide nanowire (ZnO NW)/alumina carrier impregnated with nickel (Ni) as the active phase was used to produce ultra-low sulfur diesel oil.
Journal ArticleDOI
New results on discrete-time delay systems identification
TL;DR: A new approach for simultaneous online identification of unknown time delay and dynamic parameters of discrete-time delay systems is proposed and the gradient algorithm is used to deal with the identification problem.
Journal ArticleDOI
Surfactant–Amino Acid and Surfactant–Surfactant Interactions in Aqueous Medium: a Review
TL;DR: An overview of surfactant–amino acid interactions mainly in aqueous medium has been discussed, main emphasis has been on the solution thermodynamics and solute–solvent interactions.
References
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Some aspects of the surface chemistry of carbon blacks and other carbons
TL;DR: In this paper, a review of the surface chemistry of carbon blacks and other activated carbons is given, focusing on surface oxides with emphasis on the chemical methods used in the assessment and identification of surface functional groups.
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Process Chemistry for Water and Wastewater Treatment
TL;DR: Process chemistry for water and wastewater treatment as mentioned in this paper, Process Chemistry for Water and Wastewater treatment, Process chemistry for wastewater treatment, and process chemistry for drinking water treatment, کتابخانه دانشگاه علوم پزδکی و خدمات بهداشتی درمانی
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Adsorption kinetics of fluoride on low cost materials
TL;DR: The data suggested that Calcite has been seen as a good adsorbent in fluoride removal and has been patented, but its adsorption capacity is only better than quartz, and the external mass transfer is a very slow and rate-determining step during fluoride removal from the aqueous solution.
Journal ArticleDOI
Adsorption of fluoride from water by amorphous alumina supported on carbon nanotubes
Yanhui Li,Shuguang Wang,Anyuan Cao,Dan Zhao,Dan Zhao,Xianfeng Zhang,Cailu Xu,Zhaokun Luan,Dianbo Ruan,Ji Liang,Dehai Wu,Bingqing Wei +11 more
TL;DR: A new candidate for fluoride adsorption from water, amorphous Al2O3 supported on carbon nanotubes (Al 2O3/CNTs) is reported in this article.
Journal ArticleDOI
Point of zero charge and intrinsic equilibrium constants of activated carbon cloth
TL;DR: In this paper, the surface properties of cellulose-based activated carbon cloth were investigated and the point of zero charge was determined by batch equilibrium method, where the site-binding model was applied to calculate the intrinsic acidity constants.