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Antonio Soto-Meca

Bio: Antonio Soto-Meca is an academic researcher from United States Air Force Academy. The author has contributed to research in topics: Adsorption & Langmuir adsorption model. The author has an hindex of 5, co-authored 12 publications receiving 64 citations.

Papers
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Journal ArticleDOI
TL;DR: A comparative study between the use of graphene oxide and graphene oxide functionalized with silver nanoparticles (GO@AgNPs) as adsorbents to remove phosphates from water samples has been carried out to achieve the highest adsorption efficiency.

31 citations

Journal ArticleDOI
TL;DR: It is demonstrated that 93% adsorption of ibuprofen is achieved in 45 min by means of a simple method, for neutral pH and room temperature, also using a low dose of adsorbent, equal to 7 mg in 500 µL of suspension.
Abstract: In this work we present a novel procedure for ibuprofen adsorption from waters employing magnetic core-modified silver nanoparticles. We demonstrate that 93% adsorption of ibuprofen is achieved in 45 min by means of a simple method, for neutral pH and room temperature, also using a low dose of adsorbent, equal to 7 mg in 500 µL of suspension. The characterization of the adsorbent, before and after adsorption, was carried out by means of field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, BET analysis, Fourier-transform infrared spectroscopy and differential scanning calorimetry. It is worth pointing out that ibuprofen can be desorbed and the adsorbent can be reused, remaining unaltered for the first three cycles, and showing 89.3% adsorption efficiency after the third regeneration. A three-parameter model and the Langmuir isotherm characterize the kinetics and isotherm of adsorption.

17 citations

Journal ArticleDOI
TL;DR: Results show that the pulsating regime enhances heat/mass transfer within a square cavity up to a 14%/38% respectively with respect to the non-pulsating case, due to the promotion of additional shear stress fields.

15 citations

Journal ArticleDOI
25 Jun 2021-Water
TL;DR: In this article, magnetic nanoparticles functionalized with silver (Fe3O4@AgNPs) were synthesized and used as an adsorbent of nitrates, achieving a maximum removal efficiency of 100%.
Abstract: This paper presents a novel procedure for the treatment of contaminated water with high concentrations of nitrates, which are considered as one of the main causes of the eutrophication phenomena. For this purpose, magnetic nanoparticles functionalized with silver (Fe3O4@AgNPs) were synthesized and used as an adsorbent of nitrates. Experimental conditions, including the pH, adsorbent and adsorbate dose, temperature and contact time, were analyzed to obtain the highest adsorption efficiency for different concentration of nitrates in water. A maximum removal efficiency of 100% was reached for 2, 5, 10 and 50 mg/L of nitrate at pH = 5, room temperature, and 50, 100, 250 and 500 µL of Fe3O4@AgNPs, respectively. The characterization of the adsorbent, before and after adsorption, was performed by energy dispersive X-ray spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller analysis and Fourier-transform infrared spectroscopy. Nitrates can be desorbed, and the adsorbent can be reused using 500 µL of NaOH solution 0.01 M, remaining unchanged for the first three cycles, and exhibiting 90% adsorption efficiency after three regenerations. A deep study on equilibrium isotherms reveals a pH-dependent behavior, characterized by Langmuir and Freundlich models at pH = 5 and pH = 1, respectively. Thermodynamic studies were consistent with physicochemical adsorption for all experiments but showed a change from endothermic to exothermic behavior as the temperature increased. Interference studies of other ions commonly present in water were carried out, enabling this procedure as very selective for nitrate ions. In addition, the method was applied to real samples of seawater, showing its ability to eliminate the total nitrate content in eutrophized waters.

12 citations

Journal ArticleDOI
TL;DR: The ability of the method to simultaneously adsorb all species of mercury present in water, achieving full adsorption in just a few seconds, along with the simple experimental conditions and its cost-effectiveness, strongly support the approach as an alternative to current procedures.

12 citations


Cited by
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Journal ArticleDOI
01 Jan 1941-Nature
TL;DR: Hammett as discussed by the authors summarized reaction rates, equilibria and mechanisms of organic chemistry, and applied them to the quantitative consideration of the majority of the well-known reactions in organic chemistry.
Abstract: IN the preface to this volume Prof. Hammett truly says: “It is one of the commonest occurrences in the development of science that the necessary subdivision of the subject leads to a temporary neglect of phenomena lying on the borders between specialised fields.” Fortunately, both in Great Britain and in the United States this extreme specialization has not prevented chemists from recognizing that fundamental physical theories are quite as applicable to problems in organic chemistry as they are to studies of the simpler inorganic compounds. Chemical studies of reaction mechanisms can have little value unless they are developed from basic theories of molecular structure and statistical thermodynamics. These have been summarized logically in the first third of this volume and thereafter have been applied to the quantitative consideration of the majority of the well-known reactions of organic chemistry. Physical Organic Chemistry: Reaction Rates, Equilibria and Mechanisms. By Prof. Louis P. Hammett. (International Chemical Series.) Pp. x + 404. (New York and London: McGraw-Hill Book Co., Inc., 1940.) 26s.

318 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a course in mechanics for physics students at the advanced (American) undergraduate level, which is designed for a one-year, three-hour course in physics.
Abstract: J. B. Marion New York: Academic Press. 1965. Pp. xv + 576. Price 92s. According to the author this text has been designed for a one-year, three-hour course in mechanics for physics students at the advanced (American) undergraduate level. It must be said immediately that any student assimilating the whole of the material presented would have had a most acceptable grounding in the subject.

215 citations

Journal ArticleDOI
TL;DR: In this paper, the authors have reviewed efforts and technological advances achieved so far in the pursuit of more efficient removal and recovery of heavy metals from industrial wastewaters and have evaluated their efficiency dependence on various parameters such as pH, temperature & initial dosing.
Abstract: Rapid industrialization, with economic prosperity set as the prime goal, has always created some secondary intolerable problems such as heavy metal contamination, wastewater that need remediation. Industrial wastewater is the major contributors to contamination of aquatic and terrestrial ecosystems with toxic heavy metals like arsenic, copper, chromium, cadmium, nickel, zinc, lead, and mercury whose hazardous bio-accumulative nature in biotic systems is attributed to their high solubility in the aquatic environments. There has, therefore, always been a need for the removal and/or recovery of these toxic, non-biodegradable, and persistent heavy metals from the industrial wastewater. For several decades, extensive investigations have been performed for easy, efficient, and economic removal of heavy metals with a varying degree of success. Chemical precipitation, adsorption, ion floatation, ion-exchange, coagulation/flocculation and electrochemical methods have been the most readily available conventional methods for the removal of these heavy metals. These methods however have posed some serious shortcomings such as high sludge production needing further treatment, low removal efficiency and high energy requirements. In the present years, newer more efficient, more economic and innovative technologies are being investigated. Recently photocatalysis, electrodialysis, hydrogels, membrane separation technique and introducing newer adsorbents have been developed for better adsorption. Hence in this paper, we have reviewed efforts and technological advances achieved so far in the pursuit of more efficient removal and recovery of heavy metals from industrial wastewaters and have evaluated their efficiency dependence on various parameters such as pH, temperature & initial dosing.

173 citations

Book
01 Jan 1912

133 citations

Journal ArticleDOI
TL;DR: Carbon-based adsorbents are the best class of adsorbent for the uptake of IBP and the highest reported maximum adsorption capacity for IBP is 496.1 mg/g by SWCNTs.

123 citations