Recycling of construction and demolition waste to fabricate cost-effective anorthite ceramic membranes for enhanced separation of an oil-in-water emulsion

2020 ◽  
Vol 265 ◽  
pp. 120512
Author(s):  
Lingling Li ◽  
Gengyu Cao ◽  
Ruiming Zhao ◽  
Shikui Wu ◽  
Li Wang ◽  
...  
Keyword(s):  
Cost Effective ◽  
Ceramic Membranes ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Water Emulsion ◽  
Oil In Water ◽  
Oil In Water Emulsion

scholarly journals Novel Polymer Material for Efficiently Removing Methylene Blue, Cu(II) and Emulsified Oil Droplets from Water Simultaneously

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1393 ◽  
Author(s):  
Jie Cao ◽  
Jianbei Zhang ◽  
Yuejun Zhu ◽  
Shanshan Wang ◽  
Xiujun Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Separation Efficiency ◽  
Crosslinking Agent ◽  
Cost Effective ◽  
Preparation Process ◽  
Water Emulsion ◽  
Practical Applications ◽  
Oil In Water ◽  
Oil In Water Emulsion ◽  
Oil Fouling

The pollution of water resources has become a worldwide concern. The primary pollutants including insoluble oil, toxic dyes, and heavy metal ions. Herein, we report a polymer adsorbent, named SPCT, to remove the above three contaminants from water simultaneously. The preparation process of SPCT contains two steps. Firstly, a hydrogel composed of sulfonated phenolic resin (SMP) and polyethyleneimine (PEI) was synthesized using glutaraldehyde (GA) as the crosslinking agent, and the product was named SPG. Then SPCT was prepared by the reaction between SPG and citric acid (CA) at 170 ∘ C. SPCT exhibited an excellent performance for the removal of methylene blue (MB) and Cu(II) from aqueous solution. For a solution with a pollutant concentration of 50 mg L−1, a removal efficiency of above 90% could be obtained with a SPCT dosage of 0.2 g L−1 for MB, or a SPCT dosage of 0.5 g L−1 for Cu(II), respectively. SPCT also presented an interesting wettability. In air, it was both superhydrophilic and superoleophilic, and it was superoleophobic underwater. Therefore, SPCT could successfully separate oil-in-water emulsion with high separation efficiency and resistance to oil fouling. Additionally, SPCT was easily regenerated by using dilute HCl solution as an eluent. The outstanding performance of SPCT and the efficient, cost-effective preparation process highlight its potential for practical applications.

Crossflow Microfiltration of Oil in Water Emulsion via Tubular Filters: Evaluation by Mathematical Models on Droplet Deformation and Filtration

2012 ◽  
Author(s):  
Muhammad Abbas Ahmad Zaini ◽  
Richard G. Holdich ◽  
Ian W. Cumming
Keyword(s):  
Ceramic Membranes ◽  
Transmembrane Pressure ◽  
Emulsion System ◽  
Droplet Deformation ◽  
Water Emulsion ◽  
Flat Sheet ◽  
Oil In Water ◽  
Low Interfacial Tension ◽  
Oil In Water Emulsion ◽  
Crossflow Microfiltration

Tiga jenis penuras tiub, iaitu 13 μm bukaan celah, 4 μm bukaan lingkar dan 0.45 μm membran seramik, serta penuras kepingan 13 μm bukaan celah telah digunakan untuk menapis 1000 ppm emulsi minyak dalam air. Penahanan zarah minyak berdasarkan saiz bukaan penuras juga diuji dengan memasukkan 17 mm pilin ke dalam penuras tiub bukaan celah dan bukaan lingkar. Data ujikaji telah dinilai dengan menggunakan model-model penurasan. Model ubah bentuk zarah menunjukkan bahawa kelemahan penyingkiran minyak adalah disebabkan oleh tegangan antara muka sistem emulsi yang rendah dan menyebabkan zarah minyak mudah melepasi bukaan penuras meskipun pada tekanan operasi membran yang rendah. Walau bagaimanapun, keputusan yang ditunjukkan oleh model–model penurasan mencadangkan bahawa penuras mikro bukaan celah dapat mengurangkan kegagalan fluk, serta penggunaan pilin boleh mengurangkan rintangan terhadap penurasan. Kata kunci: Ubah bentuk zarah; model penurasan; emulsi minyak dalam air Three types of tubular filters, i.e. 13 μm slots, 4 μm circular pores and 0.45 μm ceramic membranes, and 13 μm flat sheet slots were used to challenge 1000 ppm oil in water emulsion, the test liquid. The rejection of oil drops by pore size was also evaluated by incorporating a 17 mm pitch helix within the tubular slots and circular pore filters. The experimental data were analysed using filtration models. The model of droplet deformation indicates that poor rejection was caused by a low interfacial tension of emulsion system and that the oil drops could easily penetrate the filters even at low transmembrane pressure. However, the results of filtration models suggested that the use of slots was more likely to reduce the flux decay and the incorporation of a helix can greatly reduced the resistance to filtration. Key words: Droplet deformation; filtration models; oil in water emulsion

scholarly journals Ultrafiltration of oil-in-water emulsion by using ceramic membrane: Taguchi experimental design approach

2014 ◽  
Vol 12 (2) ◽  
pp. 242-249 ◽  
Author(s):  
Jania Milić ◽  
Irena Petrinić ◽  
Andreja Goršek ◽  
Marjana Simonič
Keyword(s):  
Experimental Design ◽  
Ceramic Membrane ◽  
Cross Flow ◽  
Ceramic Membranes ◽  
Optimization Criterion ◽  
Water Soluble ◽  
Taguchi Experimental Design ◽  
Water Emulsion ◽  
Oil In Water ◽  
Oil In Water Emulsion

AbstractIn this study, a Taguchi experimental design methodology was used to determine the importance of process parameters influencing the ultrafiltration (UF) of oil-in-water emulsions. Four parameters including pH (5–11), oil concentration (φ) (0.5–3% (v/v)), temperature (T) (25–45°C) and trans-membrane pressure (TMP) (1–5 bar) were studied at three levels. The highest flux was used as optimization criterion. In order to reduce the number of experiments, a Taguchi method was applied. Analysis of variance (ANOVA) was used to determine the most significant parameters affecting the optimization criterion.Filtration experiments were performed in a cross-flow operation at a total recycle condition in a laboratory-scale plant. The ceramic UF membrane with a pore size of 50 nm was employed in a tubular module with an active area of 0,418 m2. We used water-soluble cutting oil mixed with water as a model oil-in-water emulsion. During the experiment, the drop size and zeta potential distributions were evaluated.The optimum conditions for UF providing the highest flux were found at TMP = 5 bar, pH = 7, and φ = 0.5 v/v%. The pH of emulsion had the highest impact on COD retention. The results of this study could be used as a guideline for operating UF systems with ceramic membranes at optimal conditions.

scholarly journals Synthesis of MRGO Nanocomposites as a Potential Photocatalytic Demulsifier for Crude Oil-in-Water Emulsion

2021 ◽  
Vol 5 (7) ◽  
pp. 174
Author(s):  
Zhen Yin Lau ◽  
Ko Shyn Tan ◽  
Cheng Seong Khe ◽  
Chin Wei Lai ◽  
Kok Yeow You ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Petroleum Industry ◽  
Cost Effective ◽  
Hydroxyl Groups ◽  
Water Emulsion ◽  
Oil In Water ◽  
Reduced Graphene ◽  
Loading Amount ◽  
Oil In Water Emulsion

Oil-in-water (O/W) emulsion has been a major concern for the petroleum industry. A cost-effective magnetite-reduced graphene oxide (MRGO) nanocomposite was synthesized to study the demulsification process of emulsion using said nanocomposite under solar illumination. Characterization data show that the magnetite was successfully deposited on reduced graphene oxide through redox reaction at varying loading amounts of magnetite. Demulsification of the O/W emulsion using MRGO nanocomposite shows that in general the demulsification efficiency was dependent on the loading amount of Fe3O4 on the RGO sheet. It was proposed that the surfactant hydroxyl groups have an affinity towards Fe3O4, which the loading amount was directly proportionate to available active site in Fe3O4. As the loading amount increases, charge recombination centers on the RGO sheet would increase, effectively affecting the charge distribution within MRGO structure.

Sign in / Sign up

Export Citation Format

Share Document