Removal of oil from oil-in-saltwater emulsions by adsorption onto nano-alumina functionalized with petroleum vacuum residue

Franco, Camilo A.; Nassar, Nashaat N.; Cortés, Farid B.

doi:10.1016/j.jcis.2014.07.011

Cited by 58 publications

(41 citation statements)

References 50 publications

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“…4, in both cases, the amount adsorbed increased exponentially with the equilibrium concentration, and the adsorption isotherms exhibited Type III behavior according to the IUPAC (Sing et al, 1982). These types of isotherms are characteristic of multilayer adsorption on non-porous solids with weak adsorbentadsorbate interactions (Franco et al, 2014b). Adsorption proceeds as the interaction between an adsorbate and an adsorbed layer is greater than the interaction with the adsorbent surface where adsorption increases exponentially; this process leads to the formation of multilayers of pollutant on the nanoparticle surface, mainly at high initial concentrations (Franco et al, 2014b).…”

Section: Adsorption Isothermsmentioning

confidence: 88%

“…These types of isotherms are characteristic of multilayer adsorption on non-porous solids with weak adsorbentadsorbate interactions (Franco et al, 2014b). Adsorption proceeds as the interaction between an adsorbate and an adsorbed layer is greater than the interaction with the adsorbent surface where adsorption increases exponentially; this process leads to the formation of multilayers of pollutant on the nanoparticle surface, mainly at high initial concentrations (Franco et al, 2014b). This also confirms the results of the kinetic study, where fast adsorption equilibrium was achieved due to non-porous structure.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

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Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Nassar

Arar

Marei

et al. 2014

Environmental Nanotechnology, Monitoring & Management

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Please cite this article in press as: Nassar, N.N., et al., Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal. Environ. Nanotechnol. Monit. Manag. (2014), http://dx. a b s t r a c tOlive mill wastewater (OMW) is an environmental concern that has been highlighted as a serious environmental problem in the Mediterranean basin countries because of its high organic load and phytotoxic and antibacterial phenolic compounds, which resist biological degradation. Consequently, this type of wastewater represents a huge challenge for the conventional wastewater treatment techniques as it can impact the lifetime of bacteria needed for the treatment. Iron-oxide nanoparticles are attractive for wastewater treatment for two important reasons. First, nanoparticles can remove pollutants from wastewater rapidly. Second, this magnetic type of nanoparticles could be separated easily using a magnet after finishing treatment process. In this study, we aimed at investigating the effectiveness of the magnetic iron oxide nanoparticles in the removal of large organic contaminants from OMW. Batch and continuous mode processes were applied on OMW treatment to determine the effect of contact time, solution pH, coexisting contaminants and the adsorption isotherm.The results showed that the adsorption was fast and the adsorption reached equilibrium within less than 30 min. The adsorption equilibrium data fit very well to the Brunauer-Emmett-Teller (BET) Model, indicating multi-layers adsorption. The adsorption of major pollutants was associated to an efficient removal of coexisting contaminants such as heavy metals and free ions. The adsorption of OMW pollutants was dependent on pH of the solution. Finally, continuous-mode process was tested successfully using a packed bed column that combined sand filtration with magnetic nanoparticles to decolourize OMW effluent. This study will provide valuable insight on the effect of nanoparticles toward the treatment and recyclability of olive mill wastewater, which is crucial for the local olive mill industry. After seeing the successful achievement of integrating nanoparticles with fixed bed filtration, a preliminary process description and cost estimation of stand-alone plant (with a capacity of 4 m 3 /h) for OMW treatment were considered in this study. Process capital and annual operating costs were estimated to be $12,306 and $476/year, respectively.

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Section: Adsorption Isothermsmentioning

confidence: 88%

Section: Adsorption Isothermsmentioning

confidence: 99%

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Nassar

Arar

Marei

et al. 2014

Environmental Nanotechnology, Monitoring & Management

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“…El límite mínimo de confiabilidad del equipo detecta áreas superficiales de 1 m 2 /g. Para determinar los grupos funcionales presentes en el carbón, la muestra fue caracterizada por espectroscopía infrarroja (IRAffinity-1S Shimadzu, Japan) [21][22][23]. Microscopía electrónica de barrido (JSM-5910JL, JEOL Japón) fue utilizada para obtener imágenes de la muestra de carbón para confirmar que se trata de una muestra no porosa…”

Section: Caracterización De La Muestraunclassified

Effect of the temperature in adsorption phenomena of water onto Sub-Bituminous coal

2016

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The presence of water in coal presents a technological challenge for its industrial use in energetic processes. Therefore, this study aims to study the temperature effect on the water adsorption onto coals at 21, 30, 40 and 50°C. A Colombian bituminous coal was used as sample. The coal was characterized by nitrogen adsorption at 77 K (SBET), Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, elemental analysis (C-H-N elemental). The results showed that the water uptake increased as the vapor pressure increased. The Talu and Meunier model [1] was used to fit the adsorption isotherms, and the mean square root error (MSRE%) was lower than 10%. Additionally, the Gibbs free energy was found to have negative values, which corroborates the spontaneous adsorption process.Keywords: Adsorption; Coal; Isotherm; Water Efecto de la temperatura en el proceso de adsorción de agua en Carbón sub-bituminoso colombiano Resumen La presencia de agua en carbones presenta un reto tecnológico para su uso industrial en procesos energéticos. Por tal motivo, este estudio pretende analizar el efecto de temperatura en la adsorción de agua en carbones a 21, 30, 40 y 50°C. Un carbón sub-bituminoso Colombiano fue usado como muestra. El carbón fue caracterizado por adsorción de nitrógeno a 77K (SBET), Microscopía electrónica de barrido (SEM), Espectroscopia infrarroja por transformada de Fourier (FT-IR), análisis elemental (C-H-N). Los resultados muestran que la captura de agua se incrementa a medida que la presión de vapor aumenta. El modelo Talu & Meunier [1] fue utilizado para ajustar las isotermas de adsorción, presentando un buen ajuste. MSRE% menor al 10%. Adicionalmente, se calculó la energía libre de Gibbs obteniendo valores negativos, lo cual corrobora el proceso espontáneo de adsorción.

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“…El glicerol (86%, Merck KGaA, Alemania) se utilizó como el material de impregnación. La superficie del carbón fue modificada por el método de impregnación incipiente [21][22][23][24]. El glicerol se diluyó en agua destilada, fue añadido gota a gota al carbón y se coloca en un vidrio de reloj.…”

Section: Preparación Y Modificación Del Carbónunclassified

Glycerol effect on the inhibition of spontaneous combustion of subbituminous coal

Acevedo

Valencia²,

Cortés

2016

Bol. Cienc. Tierra

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Factors favoring the phenomenon of spontaneous combustion in coal mainly depend on the intrinsic properties such as coal particle size, moisture content, among others; the medium in which it is located and how it is stored. Consistent with this, the objective of this work is to evaluate the effect of glycerol on the inhibition of self-combustion as water re-adsorption reducer through the addition of glycerol in different amounts (4, 8, 18 and 28% wt). The coal sample was extracted from the Córdoba department, Colombia. Incipient impregnation method was used to perform the addition of glycerol to the desired quantities. Characterizing the coal samples was performed by: TGA-DTG, nitrogen adsorption at -196 °C, C-H-N-O, FTIR, and SEM. The TGA of the coals evaluated in an air atmosphere, show changes in combustion properties of each sample. D i ignition index is reduced as the coal is impregnated with glycerol, obtaining its lowest value for 8wt% of glycerol. The effect of glycerol in inhibiting the spontaneous combustion of coal is exposed in the adsorption equilibrium; the sample with 8wt% glycerol shows the highest reduction of water adsorption in coal validating the proposed technology as inhibitor agent spontaneous combustion phenomenon found in Colombian coal.Keywords: Adsorption; Coal; Isotherm; Water Efecto del glicerol en la inhibición de la combustión espontánea de carbón sub-bituminoso ResumenFactores que favorecen el fenómeno de auto-combustión del carbón depende principalmente de las propiedades intrínsecas, tales como tamaño de partícula, contenido de humedad, entre otros; el medio en el que se encuentra y cómo se almacena. De acuerdo con esto, el objetivo de este trabajo es evaluar el efecto del glicerol en la inhibición de auto-combustión del carbón como reductor de re-adsorción de agua, mediante la adición de glicerol en diferentes cantidades (4, 8, 18 y 28% en peso). El método de impregnación incipiente se utilizó para adicionar el glicerol a las cantidades deseadas. La caracterización de las muestras se realizó mediante: TGA-DTG, adsorción de nitrógeno a -196 ° C, C-H-N-O, FTIR, y SEM. El TGA de los carbone refleja cambios en las propiedades de combustión de cada muestra. El índice de ignición D i presenta su valor más bajo para la muestra con 8% en peso. El efecto del glicerol en la inhibición de la combustión espontánea del carbón está expuesto en el equilibrio de adsorción; la muestra con 8% en peso de glicerol presenta la mayor reducción de la adsorción de agua en el carbón validando la tecnología propuesta como agente inhibidor del fenómeno de auto-combustión en carbones colombianos.

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Removal of oil from oil-in-saltwater emulsions by adsorption onto nano-alumina functionalized with petroleum vacuum residue

Cited by 58 publications

References 50 publications

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Treatment of olive mill based wastewater by means of magnetic nanoparticles: Decolourization, dephenolization and COD removal

Effect of the temperature in adsorption phenomena of water onto Sub-Bituminous coal

Glycerol effect on the inhibition of spontaneous combustion of subbituminous coal

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