scholarly journals Turning Tissue Waste into High-Performance Microfiber Filters for Oily Wastewater Treatment

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 378
Author(s):  
Gaoliang Wei ◽  
Jun Dong ◽  
Jing Bai ◽  
Yongsheng Zhao ◽  
Chuanyu Qin
Keyword(s):  
Contact Angle ◽  
Wastewater Treatment ◽  
High Performance ◽  
Low Cost ◽  
Oily Wastewater ◽  
Water Contact ◽  
Oil Mixtures ◽  
Oil Water ◽  
Oily Wastewater Treatment ◽  
Underwater Superoleophobicity

Developing low-cost, durable, and high-performance materials for the separation of water/oil mixtures (free oil/water mixtures and emulsions) is critical to wastewater treatment and resource recovery. However, this currently remains a challenge. In this work, we report a biopolymer microfiber assembly, fabricated from the recovery of tissue waste, as a low-cost and high-performance filter for oily wastewater treatment. The microfiber filters demonstrate superhydrophilicity (water contact angle of 28.8°) and underwater superoleophobicity (oil contact angle of 154.2°), and thus can achieve separation efficiencies of >96% for both free oil/water mixtures and surfactant-stabilized emulsions even in highly acidic (pH 2.2)/alkaline (pH 11.8) conditions. Additionally, the prepared microfiber filters possess a much higher resistance to oil fouling than conventional membranes when filtering emulsions, which is because the large-sized 3D interconnected channels of the filters can delay the formation of a low-porosity oil gel layer on their surface. The filters are expected to practically apply for the oily wastewater treatment and reduce the amount of tissue waste entering the environment.

scholarly journals Oily wastewater treatment by adsorption–membrane filtration hybrid process using powdered activated carbon, natural zeolite powder and low cost ceramic membranes

2017 ◽  
Vol 76 (4) ◽  
pp. 895-908 ◽  
Author(s):  
Yaser Rasouli ◽  
Mohsen Abbasi ◽  
Seyed Abdollatif Hashemifard
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Natural Zeolite ◽  
Low Cost ◽  
Ceramic Membranes ◽  
Powdered Activated Carbon ◽  
Hybrid Process ◽  
Oily Wastewater ◽  
Alumina Membranes ◽  
Oily Wastewater Treatment

In this research, four types of low cost and high performance ceramic microfiltration (MF) membranes have been employed in an in-line adsorption–MF process for oily wastewater treatment. Mullite, mullite-alumina, mullite-alumina-zeolite and mullite-zeolite membranes were fabricated as ceramic MF membranes by low cost kaolin clay, natural zeolite and α-alumina powder. Powdered activated carbon (PAC) and natural zeolite powder in concentrations of 100–800 mg L−1 were used as adsorbent agent in the in-line adsorption–MF process. Performance of the hybrid adsorption–MF process for each concentration of PAC and natural zeolite powder was investigated by comparing quantity of permeation flux (PF) and total organic carbon (TOC) rejection during oily wastewater treatment. Results showed that by application of 400 mg L−1 PAC in the adsorption–MF process with mullite and mullite-alumina membranes, TOC rejection was enhanced up to 99.5% in comparison to the MF only process. An increasing trend was observed in PF by application of 100–800 mg L−1 PAC. Also, results demonstrated that the adsorption–MF process with natural zeolite powder has higher performance in comparison to the MF process for all membranes except mullite-alumina membranes in terms of PF. In fact, significant enhancement of PF and TOC rejection up to 99.9% were achieved by employing natural zeolite powder in the in-line adsorption–MF hybrid process.

scholarly journals COAGULATION/FLOCCULATION PROCESS FOR OILY WASTEWATER TREATMENT

2021 ◽  
Vol 25 (Special) ◽  
pp. 3-68-3-76
Author(s):  
Hussein A. Jabbar ◽  
◽  
Mohammed J. Alatabe ◽  
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Aluminum Sulfate ◽  
Low Cost ◽  
Suspended Solid ◽  
Ferric Sulfate ◽  
Oily Wastewater ◽  
Dose Concentration ◽  
Oily Waste ◽  
Oily Wastewater Treatment

Oily wastewater is one of the most dangerous forms of environmental pollution, it is large amount of water that is wasted petrochemical industries, oily waste water contains oil, suspended solids, and dissolved solids. The study investigates the treatment of real oily waste water that was collected from al-Dura refinery (Iraq) /Middle Refineries Company from oil and suspended solid contamination for re-use and environmental consideration using coagulation and flocculation processes. Coagulation /flocculation is a common method used as primary purification processes to oily wastewater treatment due to its usability, performance, and low cost. Coagulation experiments were completed by the Jar Test device. The additives coagulants of ferric sulfate and aluminum sulfate were in a range about (10- 25) ppm, as well as polyelectrolyte- (polyacrylamide) as an additional flocculent in the range (1-4) ppm. The results show that ferric sulfate was more efficient in removing turbidity than Aluminum sulfate under the same conditions, with the best removal of turbidity at dose concentration 20 ppm of Ferric sulfate and a flocculent dose concentration of 3 ppm of polyacrylamide, also with oil content decreasing from 288 ppm to 14.4 ppm and the turbidity removal from 187 to 8.5 NTU.

Effects of Tetraethyl Orthosilicate on Improving Adhesion Between Polyurethane Sponge/Hydrophobic Silica Gel Composite Materials for Oily Wastewater Treatment

2020 ◽  
Vol 12 (2) ◽  
pp. 200-205
Author(s):  
Arisa Prompawilai ◽  
Supan Yodyingyong ◽  
Darapond Triampo
Keyword(s):  
Wastewater Treatment ◽  
Silica Gel ◽  
Absorption Capacity ◽  
Tetraethyl Orthosilicate ◽  
Oily Wastewater ◽  
Water Contact ◽  
Simple Method ◽  
Hydrophobic Silica ◽  
Hydrophobic Particles ◽  
Oily Wastewater Treatment

The environmental disposal of oily wastewater is a challenge to household and food industries. Cost-effective oil absorbent materials for oily wastewater treatment have been developed by various methods, one of which, the modification with hydrophobic particles. However, the oil absorbents still suffer high cost and low reusability because of the insufficient adhesion between supported material and the hydrophobic particles. Herein, a low cost and simple method to fabricate oil absorbents were reported by immersing commercial polyurethane (PU) sponge in hydrophobic silica gel. The adhesion between hydrophobic silica gel to the 3D surface of PU was assisted with the use of tetraethyl orthosilicate (TEOS) as a silane coupling agent. Only 0.5% TEOS was required for up to 73% improvement of adhered calculated from % silica loading. The use of TEOS showed adhesion enhancement between the surface of PU and the silica which in turn improve reusability. Reusability test mimics the real situation of squeezing the PU/silica sponge to demonstrate good mechanical properties and flexibility. Furthermore, the PU/silica sponge displayed good and rapid absorption capacity. Results from Water Contact Angle (WCA), Scanning Electron Microscopy (SEM) and Fourier-transform infrared spectroscopy (FT-IR) were also used to confirm successful modification of PU with hydrophobic silica gel.

Superhydrophobic/superoleophilic magnetic polyurethane sponge for oil/water separation

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68293-68298 ◽  
Author(s):  
Shanhu Liu ◽  
Qingfeng Xu ◽  
Sanjay S. Latthe ◽  
Annaso B. Gurav ◽  
Ruimin Xing
Keyword(s):  
Wastewater Treatment ◽  
Oily Wastewater ◽  
Water Separation ◽  
Oil Water Separation ◽  
Polyurethane Sponge ◽  
Oil Water ◽  
Oily Wastewater Treatment

A magnetic PU sponge displays superhydrophobicity/superoleophilicity, and more favorably possesses magnetic responsiveness and superior stability against corrosive solutions, showing great potential in practical oily wastewater treatment.

A water solvent-assisted condensation polymerization strategy of superhydrophobic lignocellulosic fibers for efficient oil/water separation

2019 ◽  
Vol 7 (27) ◽  
pp. 16447-16457 ◽  
Author(s):  
Lei Kang ◽  
Jinpeng Li ◽  
Jinsong Zeng ◽  
Wenhua Gao ◽  
Jun Xu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Superhydrophobic Surfaces ◽  
Oily Wastewater ◽  
Condensation Polymerization ◽  
Water Separation ◽  
Lignocellulosic Fibers ◽  
Water Solvent ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oily Wastewater Treatment

Superhydrophobic surfaces have received increasing attention in a broad range of important fields including oily wastewater treatment and oil collection in spills accidents.

scholarly journals Corrosion resistance for superwetting immiscible oil/water separation porous materials

RSC Advances ◽  
2019 ◽  
Vol 9 (23) ◽  
pp. 12854-12863 ◽  
Author(s):  
Wanting Rong ◽  
Haifeng Zhang ◽  
Yanjing Tuo ◽  
Weiping Chen ◽  
Xiaowei Liu
Keyword(s):  
Corrosion Resistance ◽  
Wastewater Treatment ◽  
Porous Materials ◽  
Oil Spill ◽  
Oily Wastewater ◽  
Water Separation ◽  
Excellent Corrosion Resistance ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oily Wastewater Treatment

Superwetting porous FZCF as immiscible oil/organic solvents separation material that possesses excellent corrosion resistance can be widely applied in many industrial fields such as oily wastewater treatment and marine oil spill accidents.

scholarly journals Low-cost clay-based membranes for oily wastewater treatment

2014 ◽  
Vol 122 (1429) ◽  
pp. 788-794 ◽  
Author(s):  
Jung-Hye EOM ◽  
Young-Wook KIM ◽  
Sung-Ho YUN ◽  
In-Hyuck SONG
Keyword(s):  
Wastewater Treatment ◽  
Low Cost ◽  
Oily Wastewater ◽  
Oily Wastewater Treatment

scholarly journals Research on Application of Hydrocyclone Microbubbles Generator in Flotation of Oil-Water Emulsion

2021 ◽  
Vol 2076 (1) ◽  
pp. 012080
Author(s):  
Quan Wang ◽  
Yong Chen ◽  
Jiaxuan Huang ◽  
Bingcong Gao ◽  
Ying Chen
Keyword(s):  
Wastewater Treatment ◽  
Visual Processing ◽  
Water Surface ◽  
Oil Content ◽  
Oily Wastewater ◽  
Large Specific Surface Area ◽  
Water Emulsion ◽  
Oil Water ◽  
Oily Wastewater Treatment ◽  
Research On Application

Abstract With the improvement of environmental protection requirements, economical and efficient oily wastewater treatment methods have become a research hotspot. At the same time, the characteristics of microbubbles (large specific surface area, high zeta potential, rises slowly) make it very widely used in various fields, including the treatment of oily wastewater. There are many methods to generate microbubbles, and each method has its own applicable fields. In order to better apply microbubbles to the separation of emulsified, the experiment used a hydrocyclone to produce microbubbles. The ability of microbubbles to separate oil-water emulsions verified by the method of combining visual processing with oil content testing. The experiment shows that the hydrocyclone can generate a large number of small-sized microbubbles, and the microbubbles are stable in the emulsion for more than 30 minutes. In addition, the microbubbles can better float the emulsified oil and concentrate it on the water surface. After the treatment of microbubbles, the oily wastewater can be easily separated from oil.

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