Author
R.M. Guerrero-Coronado
Other affiliations: Instituto Potosino de Investigación Científica y Tecnológica
Bio: R.M. Guerrero-Coronado is an academic researcher from Universidad Autónoma de San Luis Potosí. The author has contributed to research in topics: Adsorption & Activated carbon. The author has an hindex of 16, co-authored 18 publications receiving 2916 citations. Previous affiliations of R.M. Guerrero-Coronado include Instituto Potosino de Investigación Científica y Tecnológica.
Papers
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TL;DR: 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.
1,865 citations
TL;DR: In this paper, the effect of temperature and pH on the adsorption isotherm of cadmium on activated carbon was investigated and it was found that the effect is a strong function of pH and temperature.
201 citations
TL;DR: In this article, the adsorption equilibrium data of Cr(VI) from an aqueous solution on a surfactant-modified zeolite (SMZ) was determined in a batch adsorber.
180 citations
TL;DR: In this paper, the effect of pH on the adsorption isotherm was investigated at pH values of 2, 4, 5 and 6, and it was concluded that Cr(III) is adsorbed to an appreciable extent on activated carbon.
Abstract: The adsorption of chromium (III) onto activated carbon was investigated as a possible alternative method for its removal from aqueous solutions. The adsorption data were obtained in a batch adsorber and fitted the Langmuir adsorption isotherm well. The effect of pH on the adsorption isotherm was investigated at pH values of 2, 4, 5 and 6. It was found that at pH values below 2 the Cr(III) was not adsorbed and at pH values above 6.4 the Cr(III) was precipitated as Cr(OH) 3 . Maximum adsorption occurred at pH 5. The pH plays a very important role in the adsorption of Cr(III) since Cr(III) can form different complexes in aqueous solutions. The adsorption capacity was increased by about 20% as the temperature was raised from 25 to 40°C. It was concluded that Cr(III) is adsorbed to an appreciable extent on activated carbon and that the adsorption is highly dependent upon pH
127 citations
TL;DR: It was demonstrated that the overall rate of adsorption was essentially not affected by the external mass transfer and the surface diffusion coefficient increased raising the mass of phenol adsorbed at equilibrium and was independent of the particle diameter.
110 citations
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TL;DR: It is evident from the literature survey articles that ion-exchange, adsorption and membrane filtration are the most frequently studied for the treatment of heavy metal wastewater.
6,844 citations
TL;DR: The technical feasibility of various low-cost adsorbents for heavy metal removal from contaminated water has been reviewed and it is evident from the literature survey of about 100 papers that low- cost adsorbent have demonstrated outstanding removal capabilities for certain metal ions as compared to activated carbon.
3,072 citations
TL;DR: This article reviews the progress made in CO2 separation and capture research and engineering and various technologies, such as absorption, adsorption, and membrane separation are thoroughly discussed.
Abstract: This article reviews the progress made in CO2 separation and capture research and engineering. Various technologies, such as absorption, adsorption, and membrane separation, are thoroughly discussed. New concepts such as chemical-looping combustion and hydrate-based separation are also introduced briefly. Future directions are suggested. Sequestration methods, such as forestation, ocean fertilization and mineral carbonation techniques are also covered. Underground injection and direct ocean dump are not covered.
1,899 citations
TL;DR: In this article, the technical applicability of various physico-chemical treatments for the removal of heavy metals such as Cd(II), Cr(III, Cr(VI), Cu(II, Ni(II) and Zn(II).
1,732 citations
TL;DR: The sorption capacities of commercial developed carbons and other low cost sorbents for chromium remediation are provided, and particular attention is paid to comparing the sorption efficiency and capacities of commercially available activated carbons to otherLow cost alternatives.
1,611 citations