Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC) -Experiment and Modeling

Carlos, Gomez; Juan, Caldentey; Wang, Shoubo; Luis, Gomez; Mohan, Ram; Shoham, Ovadia

doi:10.2523/71538-ms

Cited by 3 publications

(2 citation statements)

References 9 publications

(13 reference statements)

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“…As observed, the percentage of oil removal increased steadily up to 99%, which was the maximum with an increase in initial oil concentration, and then decreased to 55% with a further increase in initial oil concentration. When initial oil concentration was increased, the oil droplets increased and passed into the pores of the adsorbent easily, hence the initial increase in percentage adsorption [ 35 , 36 , 37 ]. Furthermore, as adsorbent dosage was increased, percentage adsorption increased slightly.…”

Section: Resultsmentioning

confidence: 99%

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

et al. 2020

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The severity of oil pollution, brought about by improper management, increases daily with an increase in the exploration and usage of oil, especially with an increase in industrialization. Conventional oil treatment methods are either expensive or time consuming, hence the need for new technologies. The aim of this research is to synthesize polypyrrole-modified silica for the treatment of oily wastewater. Pyrrole was copolymerized with silica in the presence of ferric chloride hexahydrate by adding 23 mL of 117.4 g/dm3 ferric chloride hexahydrate drop wise to a silica-pyrrole mixture (1:2.3). The mixture was stirred for 24 h, filtered and dried at 60 °C for 24 h. The composite was then characterized using FTIR and SEM/EDX. A central composite model was developed in design expert software to describe the efficiency of oil removal using the polypyrrole-modified silica under the influence of initial oil concentration, adsorbent dosage and contact time. The synthesized adsorbent had FTIR bands at 3000–3500 cm−1 (due to the N-H), 1034 cm−1 (attributed to the Si-O of silica), 1607 cm−1 and 1615 cm−1 (due to the stretching vibration of C=C of pyrrole ring). The adsorption capacity values predicted by the central composite model were in good agreement with the actual experimental values, indicating that the model can be used to optimize the removal of oil from oily wastewater in the presence of polypyrrole-modified silica. The adsorbent showed excellent oil uptake when compared with similar materials. The optimum conditions for oil removal were 7091 mg/L oil concentration, 0.004 g adsorbent dosage and contact time of 16 h. Under these conditions, the percentage of oil adsorption was 99.3% and adsorption capacity was 8451 mg/g. As a result of the low optimum dosage and the lack of agitation, the material was found to be applicable in the remediation of field wastewater.

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Section: Resultsmentioning

confidence: 99%

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

et al. 2020

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“…As seen from the response surface plot in Figure 7, percentage adsorption increased steadily up to 99%, which was the maximum with an increase in initial oil concentration and then decreased to 93% with a further increase in initial oil concentration. When initial oil concentration was increased, the oil droplets increased and passed into the pores of the adsorbent easily, hence the initial increase in percentage adsorption [47,48,49]. A point was reached however, when the size of the oil droplets equalled the size of the adsorbent pores.…”

Section: Effect Of Oil Concentration and Sorbent Dosagementioning

confidence: 99%

Application of synthesized acetylated silica in the remediation of oily wastewater

Izevbekhai

Gitari

Tavengwa

et al. 2020

Journal of Taibah University for Science

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Acetylated materials have been applied successfully in oily water remediation with some degree of success. Many of these materials which have been acetylated are, however, from seasonal fruits and other plant parts. This work reports the successful acetylation of silica extracted from diatomaceous earth by refluxing silica and acetic anhydride using 1% N-bromosuccinimide as a catalyst. The functionalization was confirmed by the presence of absorption bands at 1406 cm −1 (C-O) and 1568 cm −1 (C = O) on an IR spectrum and the presence of C, Si, and increased amount of O on the EDX spectrum. The synthesized materials were applied in the optimization of the removal of oil from synthetic oily wastewater using response surface methodology giving a percentage oil removal of 99.7%. The optimum conditions for oil removal were as follows; 7867 mg/L oil concentration, with adsorbent dosage of 0.001 g and a duration of 21.6 h, and the adsorption capacity under these conditions was found to be 1039 mg/g. The outcomes proved that acetylated silica is an excellent material for oil adsorption and can therefore be used in oil spill clean-ups.

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Experimental study of droplet behavior in a swirl flow field induced by two kinds of guiding vanes and inlet structure optimization

Shi

Sun²,

Lin

et al. 2021

J Hydrodyn

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Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC) -Experiment and Modeling

Cited by 3 publications

References 9 publications

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

Response Surface Optimization of Oil Removal Using Synthesized Polypyrrole-Silica Polymer Composite

Application of synthesized acetylated silica in the remediation of oily wastewater

Experimental study of droplet behavior in a swirl flow field induced by two kinds of guiding vanes and inlet structure optimization

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