Study of oil sorption by expanded perlite at 298.15 K (original) (raw)
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International Journal of …, 2010
During the past decades, a significant increase occurred in accidental oil spill in the aquatic environments. In this regard, oil spill in Marine freshwater is still considered as a major environmental hazard. In this research, the experimental data on the sorption capacity of expanded perlite to crude oil were correlated with the equilibrium isotherm of Langmuir, Freudlich, Tempkin and the three parameter Redlich-Peterson isotherms. The results obtained from each specified isotherms were compared and accuracy of the models were favorably discussed. Accuracy of each model using the error function were evaluated. Moreover, the effect of type of objective function on the final results was investigated. To bring up the idea; the sum of square of the average squares of the errors, the sum of the squares of the errors, the hybrid fractional error function, Marquardt's percent standard deviation and Chi-Square objective function were used and the accuracy was obtained using each objective function. The results showed that the Redlich-Peterson model can better represent the equilibrium isotherm data for the crude oil to be up taken on the expanded perlite.
Dispersion and Sorption of Oil Spills by Emulsifier-Modified Expanded Perlite
Spill Science & Technology Bulletin, 2003
Three grain sizes of expanded perlite were modified with emulsifiers and their potential usefulness in combating oil spills was studied. The tests in the laboratory show that when this perlite is added to a wateroil mixture, the light perlite particles move on the surface spreading over it very quickly (in fractions of a second). It seems that the emulsifier disperses the oil, but at the same time it disperses the perlite particles. At the end there is an emulsion and also perlite particles saturated with it. The usefulness in combating oil spills at sea depends on the following characteristics: (a) With emulsifier-modified perlite some of the oil can be removed (in the form of emulsion), whereas with emulsifiers only this is not possible. Simultaneously the spill is dispersed quickly, before spreading. (b) The action is quick even with a calm sea. Self-mixing is inherent to the process. (c) The action is quick and limited to the surface, where the perlite particles float. There is little waste of the emulsifier in the bulk of the sea.
Removal of crude oil from aqueous solutions by natural adsorbents
Ukrainian Journal of Ecology, 2018
The pollution caused by the oil industries, refineries and tanker's uploading are one of the biggest challenges. since the recent accident with spreading oil spill on the surface of sea water, the need for environmentally friendly oil sorbents has intensified. The investigation deal with the sorption of crude oil by Nano perlite and Nano zeolite, as a mineral sorbent. Results showed at the maximum level of initial oil concentration, the sorption capacity of Nano perlite and Nano zeolite are 3.11 and 2.89 g/g respectively. It woud be worth mention that the sorption capacity of Nano perlite is higher than Nano zeolite. Brunauer-Emmett-Teller (BET) surface area and X-Ray diffraction analyses were performed to characterize the properties of Nano adsorbents.
Application of Natural Sorbents in Crude Oil Adsorption
2016
In last decades, oil spill pollution has become an important issue of concern due to its serious environmental impacts; therefore, necessary actions should be taken to prevent or reduce these types of pollution and their environmental consequences. Natural organic sorbents are emerging as proper choices for oil spill cleanup due to their availability, eco-friendliness, and low cost. In this study, phragmites australis, sugarcane leaves straw, and sugarcane bagasse were used for crude oil sorption in dry (only oil) systems. The results indicated that sugarcane bagasse had a higher oil sorption capacity compared to the others. Therefore, sugarcane bagasse was selected as the preferred sorbent and the effects of sorbent contact time and its particle size on oil adsorption capacity were evaluated for the systems of dry and crude oil layer on water. The results showed that the maximum adsorption capacity of raw sugarcane bagasse for dry system and crude oil layer system was about 8 and 6...
Sorption capacity of the oil sorbents for removing of thin films of oil
Bulgarian Chemical Communications, Volume 49, Number 2, (pp. 335 – 338), 2017
Object of research are different sorbents of thin films of oil. The dependence of the sorption capacity of the sorbents on the amount of sorbent, sorption duration, the thickness of the oil film, as well as on the number of cycles of use of the sorbent was investigated. The maximum sorption for each type of oil took happened on the sorbents with the definite values of bulk density. It follows from the obtained results that the synthesized sorbents may be used as adsorbents for the removal of thin oil films.
Sorption Studies of Crude Oil on Acetylated Sawdust
Vietnam Journal of Science and Technology, 2018
Acetylated sawdust (AS) has been studied as sorbent for crude oil spill clean-up operations in the aqueous environment. Sorption kinetics and isotherm studies were carried out under various experimental conditions. The experimental data were particularly tested using the Langmuir isotherm model and the Freundlich isotherm model. The results showed that the acetylation of sawdust enhanced the equilibrium sorption capacity of biomass towards the crude oil. Kinetic studies have shown that the data better fitted the Langmuir moldel than the Freundlich model. The maximum adsorption capacity of AS was 7.9 g/g of crude oil. These values indicated that the acetylated sawdust is a suitable sorbent with potential for further development for oil spill treatment.
Sorption of oil pollution by organoclays and a coal/mineral complex
Brazilian Journal of Chemical Engineering, 2004
Recently, increasing concern about pollution of groundwater by organic chemicals has led to research on the use of various adsorbents. This study addressed the sorption of phenol and organic compounds by two organoclays and a coal/mineral complex (ARO). The organoclays used were a bentonite from Brazil (SVC) and Wyoming bentonite (SWy) with quaternary ammonium salt (ABDMA). Swelling capacity of the sorbents in toluene, diesel, gas, Varsol and kerosene were measured. Absorption of organic compounds served as an ASTM D 281-95 base, which resulted in the following order for ABDMA-SVC: gas > toluene > kerosene > diesel > Varsol. ABDMA-SWy absorbed in the following order: gas > toluene > Varsol > diesel > kerosene. ARO absorbed: gas > toluene >diesel > Varsol > kerosene. Sorption of phenol followed the order of ABDMA-SVC > ABDMA-SWy > ARO. The adsorption data show that the materials prepared were effective in sorbing phenol, and that the Brazilian clay was the most efficient of the three materials.
Macedonian Journal of Chemistry and Chemical Engineering, 2012
The adsorption behavior of 2-nitrophenol (2-NP) and 2,4-dinitrophenol (2,4-DNP) on expanded perlite (EP) at equilibrium and kinetic conditions was investigated. The experimental equilibrium data were interpreted by Langmuir, Freundlich, Redlich–Peterson, Temkin and the multilayer isotherm models. Both the Temkin and the multilayer models gave the most satisfactory representation of the experimental data for 2-NP sorption on EP covering the whole concentration range, presuming high initial sorption rate, presence of adsorbent-adsorbate chemical interactions and multilayer adsorption, as the basic characteristics featuring the equilibrium behavior of the system studied. The experimental kinetic results were analyzed by the pseudo-first, pseudo-second order models, Bangham’s model, intra-particle diffusion model, and Elovich kinetic equation. The values of the calculated rate, mass transfer parameters and correlation coefficients proved that chemisorptions/intraparticle diffusion could...
Adsorption of Crude Oil on Na + Montmorillonite
Energy & Fuels, 2005
The interaction between a natural Na + -montmorillonite and a crude oil sample containing 2.5 wt % of asphaltene and 6.4 wt % of polar species is studied as a function of time. The microscopic and the macroscopic mechanisms of diffusion are examined and discussed. At a microscopic scale, diffusion of crude oil within the clay interlayer space is a slow and a continuous process with the formation of O/W microemulsions within the d(001) space, which involves those crude oil polar molecules with tensoactive properties, interlayer water molecules, and the clay Na + interlayer cations. At a macroscopic scale, the diffusion of the organic species is also a slow but stepped process. At the beginning, such a process is controlled by a concentration gradient (the Fick law) of crude oil species which diffuses into clay pellet, and it is followed by a viscous flow-type diffusion, when the compacted clay mineral pellet is surrounded by a thick O/W emulsion of crude oil, clay colloids, and water expulsed from the interlayer space.
This study reports the oil adsorption and re-use efficiency of the zeolite clinoptilo-lite. Three clinoptilolite samples (E-, R-, and T-TUR) from Turkey were analysed, including samples from the Aegean Region, Turkey. Analyses were compared with clinoptilolite from New Mexico, USA (C-USA). Samples were tested in replicated laboratory analyses in terms of their ability to adsorb automobile oil (AO). Analyses included: (i) clinoptilolite samples were prepared for oil adsorption, using both hy-drated (HC) and dehydrated (DHC) samples; (ii) Buchner funnels were lined with Whatman filter paper and batch adsorption experiments were conducted by adding 10 ml oil to 10 g samples of clinoptilolite. The oil infiltrating through samples was measured, thus enabling calculation of the amount of adsorbed oil. There were five replicates of each treatment; (iii) oil was removed from the clinoptilolite samples by heat treatment in a muffle furnace. Treatments were carried out at 500, 700 and 900 o C for 1 h. The oil adsorption experiments were repeated on the ignited samples (four replicates). Results showed that DHC samples generally adsorbed more AO than HC after 900 o C treatment. The adsorption capacities of the HC and DHC were 44.10–49.71 and 43.00–48.70%, respectively. The adsorption capacities of HC and DHC were 31.27–46.09 and 47.71–54.70%, respectively, after ignition at 700 o C. The adsorption capacities of HC and DHC were 68.92–80.91 and 65.57–78.94%, respectively, after the treatment at 500 o C. Overall, the amount of recycled oil by clinoptilolite varied between 39.01 and 82.78%. Turkish clinoptilolites had similar oil adsorption proper