Research Progress of Wastewater Filtration Materials Prepared by Electrospinning
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The principle,merits of electrospinning and its applications on wastewater filtration materials are introduced,including research progress both at home and abroad of prepared technique on adsorbant and photocatalytic properties by electrospinning.And it points out that electrospun filtration material will play an important role in future waste water treatment.Keywords:
Electrospinning
Filtration (mathematics)
Air filtration
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The aim of this study was to evaluate the use of nanofiber microfiltration membranes, spun by an innovative electrospinning technique, in water filtration applications. This study bridges between developments in electrospinning techniques for the production of flat sheet membranes and the application of these membranes in water filtration. The functionalized or non-functionalized for the removal of pathogens was investigated, in term of culture mechanism of bacteria spot in the waste water. Physical properties such as clean water permeability (CWP) and strength were also examined. The test showed that the electrospun membranes can be used for water filtration applications.
Electrospinning
Filtration (mathematics)
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Water pollution has been an important issue in recent era. Water filtration/purification with recent technology is the latest demand in today's economy. The advancement in filtration technology has invigorated extensive awareness in engineered nanomaterials, such as electrospun nanofibers for supplying potable drinking water with low investment. Polymeric nanofibrous membranes have been receiving extensive attention for their applications in filtration technology. Many methods, such as self-assembly, phase separation and drawing are being used to fabricate polymer nanofibers. However, due to the unique features, electrospinning is a method of choice for fabricating nanofibrous membrane in a very short period of time with low investment. In this study, an electrospun nanofibrous membrane was prepared via an electrospinning method for filtration. City wastewater (Tabuk) was chosen for filtration process. The major parameters of wastewater treatments were determined. These parameters were pH, conductivity, total dissolved solids, turbidity, chemical oxygen demand, total suspended solids, dissolved oxygen, biochemical oxygen demand, phosphate, ammonia, oil and greases. The static water contact angles of all samples were also measured by means of a goniometer to determine whether membrane was hydrophobic or hydrophilic. The Fourier-transform infrared spectroscopy analysis of samples was also carried out to study the molecular components and structure.
Electrospinning
Filtration (mathematics)
Turbidity
Total suspended solids
Total dissolved solids
Biochemical oxygen demand
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Membrane filtration for separating contaminants from aqueous cleaning solutions based on molecular size, shape, and charge is described in this paper. Ultrafiltration is a pressure driven membrane filtration technique capable of producing high quality filtrate from wastewater. Three case studies are briefly described where ultrafiltration has been incorporated into the manufacturing process.
Ultrafiltration (renal)
Filtration (mathematics)
Membrane Technology
Nanofiltration
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Electrospinning
Filtration (mathematics)
Polypropylene
Low-density polyethylene
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Membrane filtration technique is a kind of highly efficient, low energy consumption and easy operation liquid separation technique, which is promising in wastewater treatment. Based on the introduction of properties and classification of filtration membrane, the application and its progress in wastewater treatment are described,including its application to the treatment of oil bearing wastewater, domestic wastewater, paper industry wastewater, color wastewater, dye wastewater, chemical synthesis wastewater, heavy metal ion wastewater, etc . The direction of membrane filtration technique development in the future is also discussed. Reducing membrane pollution and developing cheap membrane and modules are important in wastewater treatment by membrane filtration technique. Combining membrane filtration technique with other wastewater treatment technique in practical application will exert advantages of each method and their coordination effects, obtaining best treatment effects and optimal economical benefit.
Filtration (mathematics)
Membrane Technology
Industrial wastewater treatment
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In recent days, water pollution is a major threat to the ecology and human health due to the presence of different contaminants in water such as heavy metal ions (Cr2+, Cu2+, Cd2+, Zn2+, arsenic, etc.), waterborne bacteria (E. coli), virus (MS 2 ), organic dye effluents. Hence, removal of these contaminants is a topic of interest to the researchers. Different conventional methods have been developed for filtration of the wastewater. But these processes are time consuming and not a cost-effective method. To resolve these issues new technologies have come up and such technologies hold great promises to provide alternatives for better protection of public health and the environment. Among them membrane filtration can be broadly defined as a separation process. The most important types of membrane filtration techniques are pressure driven processes including microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). Membrane filtration offers various advantages like it controls mass transport in the embrane and fouling tendency of the membrane, as well as separation of solid-liquid particles that are passed for treatment through the membrane, removal of organic matter and inorganic contaminants too. This chapter mainly focuses on detailed discussion of membrane filtration based nanofibrous filter for wastewater filtration.
Nanofiltration
Ultrafiltration (renal)
Filtration (mathematics)
Membrane Technology
Membrane Fouling
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More and more attention was paid to the membrane separation technology for it was energy-saving,simple,easy-to-operate and efficient.The foundational theories of several membrane filtration techniques,such as micro-filtration,ultra-filtration,nano-filtration and reverse osmosis and research and development of membrane filtration techniques in the treatment of oil-contained wastewater,heavy metal wastewater,papermaking wastewater,food wastewater were introduced respectively.
Filtration (mathematics)
Membrane Technology
Papermaking
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Filtration (mathematics)
Industrial wastewater treatment
Membrane Technology
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Filtration (mathematics)
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The textile sector plays a critical role in this context, because textile companies are large users of water - typically 0.2-0.5 m3 are needed to produce 1 kg of finished product [1] – and they are historically concentrated in districts (e.g. Prato in Italy) located in Southern Member States, such as Italy, Spain and Portugal, which are facing more and more longer periods of drought and therefore are strongly in the need to preserve the availability of water for potable use. The finishing processes (i.e. pre-treatment, dyeing, printing and special finishing) are especially polluting and resource consuming in terms of water, energy and chemicals. Almost the entire of water used in textile production is discharged and, on average, the effluents volume covers 90-95% of the water used [2]. According to that, a new Ultrafiltration/Sonichemical combined process has been investigated on textile wastewater by evaluating the reduction of the pollution load induced by physical separation and by chemical oxidation promoted by Ultrasound cavitation. The experimental campaign carried out at the Municipal Wastewater treatment Plant in Prato showed that the quality of the treated water reaches the target reported in literature [3] for textile manufacturing sectors. An estimation of the costs of the purified water has been assessed and the combined process seems to be promising for further development. The authors would like to thank the European Commission to funding this project (contract number LIFE07/IT/000439) within the LIFE+ Environmental Policy and Governance 2007 Programme.
Ultrafiltration (renal)
Textile industry
Textile
European commission
Industrial wastewater treatment
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