scholarly journals The Perspective and Challenge of Nanomaterials in Oil and Gas Wastewater Treatment

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3945
Author(s):  
Xiaoying Liu ◽  
Wenlin Ruan ◽  
Wei Wang ◽  
Xianming Zhang ◽  
Yunqi Liu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Oil And Gas ◽  
Membrane Separation ◽  
High Surface ◽  
High Porosity ◽  
Treatment Technology ◽  
Water Separation ◽  
Separation Technology ◽  
Oil Water Separation ◽  
Membrane Treatment

Oil and gas wastewater refers to the waste stream produced in special production activities such as drilling and fracturing. This kind of wastewater has the following characteristics: high salinity, high chromaticity, toxic and harmful substances, poor biodegradability, and a difficulty to treat. Interestingly, nanomaterials show great potential in water treatment technology because of their small size, large surface area, and high surface energy. When nanotechnology is combined with membrane treatment materials, nanofiber membranes with a controllable pore size and high porosity can be prepared, which provides more possibilities for oil–water separation. In this review, the important applications of nanomaterials in wastewater treatment, including membrane separation technology and photocatalysis technology, are summarized. Membrane separation technology is mainly manifested in ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). It also focuses on the application of semiconductor photocatalysis technology induced by TiO2 in the degradation of oil and gas wastewater. Finally, the development trends of nanomaterials in oil and gas wastewater treatment are prospected.

scholarly journals Synchronous oil/water separation and wastewater treatment on a copper-oxide-coated mesh

RSC Advances ◽  
2021 ◽  
Vol 11 (29) ◽  
pp. 17740-17745
Author(s):  
Yahua Liu ◽  
Peng Xu ◽  
Wenna Ge ◽  
Chenguang Lu ◽  
Yunlai Li ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Copper Oxide ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

An integrated multifunctional copper-oxide-coated mesh was designed via facile immersing and burning methods, which manifests synchronous oil/water separation and wastewater treatment.

A Wall Film Model for Membrane Fouling

2018 ◽  
Author(s):  
Sina Jahangiri Mamouri ◽  
Volodymyr V. Tarabara ◽  
André Bénard
Keyword(s):  
Multiphase Flow ◽  
Membrane Fouling ◽  
Oil And Gas ◽  
Membrane Separation ◽  
Film Formation ◽  
Membrane Surface ◽  
Permeate Flux ◽  
Water Separation ◽  
Wall Film ◽  
Oil Water

Deoiling of produced or impaired waters associated with oil and gas production represents a significant challenge for many companies. Centrifugation, air flotation, and hydrocyclone separation are the current methods of oil removal from produced water [1], however the efficiency of these methods decreases dramatically for droplets smaller than approximately 15–20 μm. More effective separation of oil-water mixtures into water and oil phases has the potential to both decrease the environmental footprint of the oil and gas industry and improve human well-being in regions such as the Gulf of Mexico. New membrane separation processes and design of systems with advanced flow management offer tremendous potential for improving oil-water separation efficacy. However, fouling is a major challenge in membrane separation [2]. In this study, the behavior of oil droplets and their interaction with crossflow filtration (CFF) membranes (including membrane fouling) is studied using computational fluid dynamics (CFD) simulations. A model for film formation on a membrane surface is proposed for the first time to simulate film formation on membrane surfaces. The bulk multiphase flow is modeled using an Eulerian-Eulerian multiphase flow model. A wall film is developed from mass and momentum balances [3] and implemented to model droplet deposition and membrane surface blockage. The model is used to predict film formation and subsequent membrane fouling, and allow to estimate the actual permeate flux. The results are validated using available experimental data.

scholarly journals Controllable synthesis of pomelo peel-based aerogel and its application in adsorption of oil/organic pollutants

2019 ◽  
Vol 6 (2) ◽  
pp. 181823 ◽  
Author(s):  
Guangyu Shi ◽  
Yizhu Qian ◽  
Fengzhi Tan ◽  
Weijie Cai ◽  
Yuan Li ◽  
...  
Keyword(s):  
High Speed ◽  
Chemical Properties ◽  
Absorption Capacity ◽  
High Porosity ◽  
X Ray Diffraction ◽  
Water Separation ◽  
Physico Chemical ◽  
Wide Range ◽  
Oil Water Separation ◽  
Oil Water

Oil/water separation is a field of high significance as it might efficiently resolve the contamination of industrial oily wastewater and other oil/water pollution. In this paper, an environmentally-friendly hydrophobic aerogel with high porosity and low density was successfully synthesized with renewable pomelo peels (PPs) as precursors. Typically, a series of sponge aerogels (HPSA-0, HPSA-1 and HPSA-2) were facilely prepared via high-speed dispersion, freeze-drying and silanization with methyltrimethoxysilane. Indeed, the physical properties of aerogel such as density and pore diameter could be tailored by different additives (filter paper fibre and polyvinyl alcohol). Hence, their physico-chemical properties including internal morphology and chemical structure were characterized in detail by Fourier transform infrared, Brunauer–Emmett–Teller, X-ray diffraction, scanning electron microscope, Thermal gravimetric analyzer (TG) etc. Moreover, the adsorption capacity was further determined and the results revealed that the PP-based aerogels presented excellent adsorption performance for a wide range of oil products and/or organic solvents (crude oil 49.8 g g −1 , soya bean oil 62.3 g g −1 , chloroform 71.3 g g −1 etc.). The corresponding cyclic tests showed the absorption capacity decreased slightly from 94.66% to 93.82% after 10 consecutive cycles, indicating a high recyclability.

Designing novel superwetting surfaces for high-efficiency oil–water separation: design principles, opportunities, trends and challenges

2020 ◽  
Vol 8 (33) ◽  
pp. 16831-16853 ◽  
Author(s):  
Lei Qiu ◽  
Yihan Sun ◽  
Zhiguang Guo
Keyword(s):  
High Efficiency ◽  
Design Principles ◽  
Water Separation ◽  
Separation Technology ◽  
Oil Water Separation ◽  
Oil Water

The limitations of traditional separation technology force people to find a more advanced separation technology, while the special wetting material has attracted the attention of most researchers.

Graphene foam with hierarchical structures for the removal of organic pollutants from water

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 4889-4898 ◽  
Author(s):  
Sudong Yang ◽  
Lin Chen ◽  
Lei Mu ◽  
Bin Hao ◽  
Junteng Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Organic Pollutants ◽  
Hierarchical Structure ◽  
Hierarchical Structures ◽  
High Porosity ◽  
Water Separation ◽  
Graphene Foam ◽  
Excellent Thermal Stability ◽  
Oil Water Separation ◽  
Oil Water

Graphene foam with hierarchical structure was prepared. The developed material exhibited high porosity, hydrophobicity, excellent thermal stability, and can be for oil–water separation.

scholarly journals Electrophoretic Deposition of Graphene Oxide on Laser-Ablated Copper Mesh for Enhanced Oil/Water Separation

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 157 ◽  
Author(s):  
Rui Zhou ◽  
Fei Shen ◽  
Jingqin Cui ◽  
Yonggang Zhang ◽  
Huangping Yan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Laser Processing ◽  
High Surface ◽  
Copper Substrate ◽  
Synergetic Effect ◽  
Surface Wettability ◽  
Hole Drilling ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

The fabrication of bionic surfaces resembling hydrophobic plants through micro manufacturing, which creates abundant multi-level micro/nanostructures and elemental variations, has been widely employed to change the surface wettability of metallic materials. Based on the mechanisms for selective permeation of various liquids, it could achieve the function of oil/water separation. Herein, a separation copper membrane fabricated with pulsed laser ablation and modified with graphene oxide (GO) deposition showed a synergetic effect on tunable surface wettability. Micro/nanostructures were generated on the copper substrate membrane through concentric circular scanning, which was followed by hole drilling. Afterwards, charged GO nanosheets were deposited via electrophoresis. The spacing of circular lines, the diameter of the holes and the abundant high-surface-energy hydrophilic oxygen contained in deposited GO amounts could be regulated in the laser processing and deposition, resulting in oleophobicity and hydrophilicity at the same time. The highest contact angle of oil in water of the prepared mesh could reach above 165° with a hole size of 200 µm and a circular line spacing of 100 µm after the laser processing. Water flux and oil-holding capacity, which represent the separation capability of the mesh, were also evaluated. The as-prepared separation mesh also showed great stability under harsh environments.

Sign in / Sign up

Export Citation Format

Share Document