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
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Photocatalytic Degradation of Aniline Using TiO2 Nanoparticles in a Vertical Circulating Photocatalytic Reactor
TL;DR: In this article, the effects of catalyst concentration, pH, temperature, and irradiation time on aniline photodegradation were investigated in a vertical circulating photocatalytic reactor.
Journal ArticleDOI
Single and competitive adsorption of Cd(II) and Pb(II) ions from aqueous solutions onto industrial chili seeds (Capsicum annuum) waste
Nahum Andrés Medellín-Castillo,Erika Padilla-Ortega,María C. Regules-Martínez,Roberto Leyva-Ramos,Raúl Ocampo-Pérez,Candy Carranza-Álvarez +5 more
TL;DR: In this paper, the single and binary adsorption of Cd(II)-Pb(II) onto industrial chili seeds (CS) ( Capsicum annuum ) from aqueous solutions was investigated as a possible low-cost biosorbent for the removal of toxic heavy metals.
Journal ArticleDOI
Thermodynamic, Kinetic, and Equilibrium Parameters for the Removal of Lead and Cadmium from Aqueous Solutions with Calcium Alginate Beads
Ruth Alfaro-Cuevas-Villanueva,Aura Roxana Hidalgo-Vázquez,Consuelo de Jesús Cortés Penagos,Raúl Cortés-Martínez +3 more
TL;DR: Investigation of the sorption of cadmium and lead by calcium alginate beads in batch systems found that pH has an important effect on the adsorption of these metals by CAB, as more were removed at pH values between 6 and 7.
Journal ArticleDOI
Physico-chemical characterization of metal-doped bone chars and their adsorption behavior for water defluoridation
Cintia Karina Rojas-Mayorga,Adrian Bonilla-Petriciolet,Joaquín Silvestre-Albero,Ismael Alejandro Aguayo-Villarreal,Didilia Ileana Mendoza-Castillo +4 more
TL;DR: A detailed statistical analysis of the metal doping process using the signal-to-noise ratios from Taguchi's experimental designs and its impact on the fluoride adsorption properties of modified bone chars have been performed as discussed by the authors.
Journal ArticleDOI
Integrated design of a gas separation system for the upgrade of crude SNG with membranes
TL;DR: In this article, the authors investigated different design strategies and process layouts for upgrading crude synthetic natural gas (SNG) produced from lignocellulosic biomass to grid quality.
References
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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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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.