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2015-9-7 · Synthesis and coagulation performance of composite po ly-aluminum-ferric-silicate-chloride coagulants in water and wastewater treatment and their potentially use to alleviate the membrane fouling in MBRs A.K. Tolkou1, A.I. Zouboulis1, P.E. Samaras2
Get Price2017-12-20 · Aromatic polyimide (PI) fiber, as one of the important high-performance organic fibers, exhibits several valuable properties, such as good resistance to high temperature and radiation , maintaining good mechanical properties even up to 400-500 °C , , superior chemical resistance, nonflammability and so on. This …
Get Price2019-1-1 · This underscores the importance of the design and synthesis phases of polymer nanocomposite production. In this chapter we have outlined in detail the design process and synthesis techniques for polymer nanocomposite production. In-depth analysis of design strategies, principles, and mechanisms that guide …
Get Price2018-6-22 · A novel inorganic–organic composite flocculant CTS-PFCS was successfully synthesized by the combination of chitosan and homemade PFCS. The potential use of chitosan as an organic additive for modifying inorganic polymers flocculant in the clarification of wastewater was demonstrated. © 2018 Society of …
Get Price2017-5-2 · Magnetic composite coagulants, the combination of magnetic materials and coagulants, are considered to exhibit better coagulation performance than traditional coagulants since their magnetic components may improve coagulation behaviors and facilitate magnetic separation following the coagulation process …
Get Price2020-11-15 · Destabilization of theses colloids takes place through processes called coagulation and flocculation. The coagulation process involves the addition of a chemical to induce charge neutralization of colloidal particles, whereas flocculation is the formation of large agglomerates from small colloidal particles [1,2].
Get Price2020-6-29 · During the synthesis process, PSi and aluminum were reacted with the carbon chains of CS to form a larger mesh structure (Lin et al. 2015). Therefore, the formed PSAS-CS presented a larger diameter and rougher surface, which was conducive to the adsorption bridging and the net capture of colloidal particles in …
Get Price2020-9-15 · Then, 0.1 N of NaOH solution was added to the washed sawdust and stirred for four hours, neutralized and dried. The dried samples were then carbonized at 973.15 K for an hour in a muffle furnace. The activated carbon obtained was used in making composite. The nanocomposite was made with 10 gm of activated …
Get PriceCoagulation performance results showed that the PATC-PDMDAAC had an organic and inorganic ratio of 0.15 and exhibited excellent removal efficiency at pH 9.0, dosage of 1.80 mg/L, sedimentation time of 40 min, and a stirring speed of 110 r/min.
Get Price2019-5-25 · Synthesis, structure and properties of carbon nanotube/poly(p-phenylene benzobisoxazole) composite fibres. Polymer International 2006 , 55 (4) , 456-465. DOI: 10.1002/pi.1998.
Get PriceCoagulation performance results showed that the PATC-PDMDAAC had an organic and inorganic ratio of 0.15 and exhibited excellent removal efficiency at pH 9.0, dosage of 1.80 mg/L, sedimentation time of 40 min, and a stirring speed of 110 r/min. The optimal treatment efficiency reduced the turbidity to 0.56 NTU …
Get Price2020-2-18 · High-poly-aluminum chloride sulfate (HPACS) coagulants with different [SO 4 2−]/[Al 3+] molar ratio (S) were prepared and proved to have high coagulation efficiency for the removal of humic acid and strong stability for storage and application.The results showed that the higher the SO 4 2− addition, the bigger …
Get Price2. Materials and methods 2.1 Materials Poly(lactide-co-glycolide) (PLGA) (D, L-lactide: glycolide = 50: 50) with an average molecular weight of 70–100 KDa and poly-L-ornithine (molecular weight 30–70 KDa) were purchased from Sigma-Aldrich.Fucoidan was purchased from Shandong Jiejing Inc. Doxorubicin …
Get PriceClay-brine process employing activated clay, NaCl, HCl, and HF as raw materials is the primarily advanced technology to synthesize cryolite in the present industrial grade. However, plenty of byproducts of fluorine-containing waste HCl at the concentration of about 10%~12% could not be utilized comprehensively and are …
Get PriceCoke plant wastewater is high concentration organic wastewater from the process of making coke, purifying coal gas and recovering the coke products. At present this wastewater was treated by biochemical process, but it is difficult to meet the effluent water discharge standards and recycling because of difficult degradable organic …
Get PriceThe improvement in performance of nanocomposite materials is attributed to the increased surface area and conductivity [43]. The synthesis, characterization, ion exchange properties and applications of Zr (IV), Sn (IV) and Th (IV) based nanocomposite ion exchangers have been discussed in the subsequent paragraphs.
Get Price2021-4-20 · The coagulation bath consisted of the monomer MPD (0.1 wt% or 0.3 wt%) next to the non-solvent Milli-Q water, as shown in Figure S2, in order to simultaneously perform NIPS and support impregnation with the first monomer. This synthesis process is here referred to as the simultaneous (SIM) synthesis method …
Get PriceCoagulation performance results showed that the PATC-PDMDAAC had an organic and inorganic ratio of 0.15 and exhibited excellent removal efficiency at pH 9.0, dosage of 1.80 mg/L, sedimentation time of 40 min, and a stirring speed of 110 r/min. The optimal treatment efficiency reduced the turbidity to 0.56 NTU …
Get Price2015-8-20 · Preferably, the method of the present invention involves an interfacial polymerisation process for forming a composite membrane, whereby the TFC top layer is a polyamide top layer and wherein said polyfunctional monomers of step (ii) comprise polyfunctional amines and said polyfunctional monomers for interfacial …
Get PriceSynthesis and Characterization of Chitosan-Silica Membranes for Treating Hotel Wastewater Treatment as Affected by Mass of Poly Ethylene Glycol and Poly Vinyl Alcohol ABST1CT: Chitosan-silica composite membrane was an a5ractive choice for the purification process because their porous size and morphology provide higher …
Get Price2018-9-26 · Solution combustion synthesis (SCS) is a wet-route chemical process, and it is an effective method for the synthesis of nanoscale materials. The process is presented in figure 6 (a). A nitrate salt solution of lithium, nickel and cobalt is mixed with glycine and heated at 90 °C–100°C for 1 h, before being heated at 750 °C for …
Get Price2013-6-5 · Coagulation and Flocculation Process Fundamentals 1 Coagulation and Flocculation . Groundwater and surface water contain both dissolved and suspended particles. Coagulation and flocculation are used to separate the suspended solids portion from the water. Suspended particles vary in source, charge, particle size, …
Get PriceFloccultaion-coagulation process is a very effective way to improve its dewatering performance and achieve the purposes of sludge dewatering. Currently sludge conditioners used by municipal wastewater treatment plant are cationic polyacrylamides (CPAMs) . CPAMs have many advantages including low dosage, …
Get Price2020-6-4 · Membrane-based liquid filtration systems are key process engineering platforms for the chemical industry, particularly for solvent intensive processes. While they are used in a large scale for desalination, in water treatment, and in the food industry, polymeric membranes are mostly fabricated from solutions in …
Get PriceThe improvement in performance of nanocomposite materials is attributed to the increased surface area and conductivity [43]. The synthesis, characterization, ion exchange properties and applications of Zr (IV), Sn (IV) and Th (IV) based nanocomposite ion exchangers have been discussed in the subsequent paragraphs.
Get PriceCoagulation performance results showed that the PATC-PDMDAAC had an organic and inorganic ratio of 0.15 and exhibited excellent removal efficiency at pH 9.0, dosage of 1.80 mg/L, sedimentation time of 40 min, and a stirring speed of 110 r/min. The optimal treatment efficiency reduced the turbidity to 0.56 NTU …
Get Price2019-11-26 · P.A. Moussas, A.I. Zouboulis, Synthesis, characterization and coagulation behavior of a composite coagulation reagent by the combination of polyferric sulfate (PFS) and cationic polyelectrolyte, Sep. Purif. Technol., 96 …
Get Price2004-3-10 · The synthesis of nanocomposites via emulsion polymerization was investigated using methyl methacrylate (MMA) monomer, 10 wt % montmorillonite (MMT) clay, and a zwitterionic surfactant octadecyl dimethyl betaine (C18DMB). The particle size of the diluted polymer emulsion was about 550 nm, as determined by …
Get Price2021-6-14 · composite was precipitated again by adding the mixture of methanol and water (volume ratio 5:1). After being washed several times with a mixture of distilled water and methanol (1:1 by volume), the composite was then dried in a vacuum oven. 3. Results and Discussion The starch-g-poly (acrylic acid acrylamide) graft …
Get PriceIn recent decades, heavy metal pollution in water environment has attracted widespread attention, especially mercury ion pollution, which is the most toxic [].Due to the characteristics of persistence and bioaccumulation, the ingestion of mercury ions will cause serious damage to human body and organisms [9,10].Hg(II) ions …
Get Price2011-10-26 · Lifang Zhu, Mali Zhou, Shanshan Yang, Jiangnan Shen, Novel Tertiary Amino Containing Blinding Composite Membranes via Raft Polymerization and Their Preliminary CO2 Permeation Performance, International Journal of Molecular Sciences, 10.3390/ijms16059078, 16, 5, (9078-9096), (2015).
Get Price2020-7-3 · The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to …
Get Price2020-10-17 · additives on the morphology and separation performance of poly(m-phenylene isophthalamide) (PMIA) hollow fiber nanofiltration membrane. Desalination, 365 (2015): 293-307. 5. Tao Wang, Ye Li, Changwei Zhao, Jun Wang. Synthesis and Properties of High Oil
Get Price2021-3-22 · 1. Reticular Chemistry and MOFs. Reticular chemistry is a recently developed area in organic chemistry and material science, concerning the strategic and rational synthesis of new organic compounds by promoting the controlled growth and formation of regular, porous and crystalline structures [1,2].By choosing …
Get PriceThe T g of samples are almost the same, varies between 58.8 °C and 60 °C, there is a slight increase due to the incorporation of LDHs in the PLA. 55,56 During the second heating, the exothermic peaks attributed to the cold crystallization process indicate that the melt crystallization process during the previous cooling step was …
Get Price2015-8-20 · Preferably, the method of the present invention involves an interfacial polymerisation process for forming a composite membrane, whereby the TFC top layer is a polyamide top layer and wherein said polyfunctional monomers of step (ii) comprise polyfunctional amines and said polyfunctional monomers for interfacial …
Get Price2018-9-26 · Solution combustion synthesis (SCS) is a wet-route chemical process, and it is an effective method for the synthesis of nanoscale materials. The process is presented in figure 6 (a). A nitrate salt solution of lithium, nickel and cobalt is mixed with glycine and heated at 90 °C–100°C for 1 h, before being heated at 750 °C for …
Get Price2014-3-13 · 2 Direct Synthesis of Highly Conductive PEDOT:PSS/Graphene Composites and Their Applications in Energy Harvesting Systems Dohyuk Yoo1, Jeonghun Kim2, and Jung Hyun Kim1 ( ) 1 Department of Chemical and Biomolecular Engineering, Yonsei University 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749 …
Get PriceAbstract: The degradation and detachment of the polyamide (PA) layer in thin-film composite (TFC) membranes due to chlorine based chemical cleaning and material difference of PA layer and substrate are two major bottlenecks of forward osmosis (FO) technology. In this study, a new type of FO membranes were prepared by …
Get Price2020-6-4 · Membrane-based liquid filtration systems are key process engineering platforms for the chemical industry, particularly for solvent intensive processes. While they are used in a large scale for desalination, in water treatment, and in the food industry, polymeric membranes are mostly fabricated from solutions in …
Get Price2015-3-26 · The phase inversion process was first introduced in membrane technology by Loeb and Sourirajan 47 in the 1960's and is the base for the synthesis of most commercially available membranes. During the phase inversion process, a thermodynamically stable polymer solution is transformed from a liquid into a solid …
Get Price2019-9-26 · Effect of non-solvent additives on the morphology and separation performance of poly(m-phenylene isophthalamide) (PMIA) hollow fiber nanofiltration membrane. Desalination, 365:293-307. 3. Tao Wang, Ye Li, Changwei Zhao*. 2015. Synthesis and Properties of
Get Price2015-8-20 · Preferably, the method of the present invention involves an interfacial polymerisation process for forming a composite membrane, whereby the TFC top layer is a polyamide top layer and wherein said polyfunctional monomers of step (ii) comprise polyfunctional amines and said polyfunctional monomers for interfacial …
Get PriceThe T g of samples are almost the same, varies between 58.8 °C and 60 °C, there is a slight increase due to the incorporation of LDHs in the PLA. 55,56 During the second heating, the exothermic peaks attributed to the cold crystallization process indicate that the melt crystallization process during the previous cooling step was …
Get Price2014-3-13 · 2 Direct Synthesis of Highly Conductive PEDOT:PSS/Graphene Composites and Their Applications in Energy Harvesting Systems Dohyuk Yoo1, Jeonghun Kim2, and Jung Hyun Kim1 ( ) 1 Department of Chemical and Biomolecular Engineering, Yonsei University 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749 …
Get Price2011-4-27 · In recent years, many studies have been devoted to the synthesis of silicon-containing polymers because of their potential applications in areas such as coatings, composite matrices, ceramic ...
Get Price2015-10-15 · The process developed in this research presented a fast and simple approach in making hydrophobic surfaces. Issue Section: ... Mechanically Durable Carbon Nanotube−Composite Hierarchical Structures With Superhydrophobicity, Self-Cleaning, and Low-Drag ... Effect of Ethanol Composition in Water Coagulation …
Get Price2013-6-5 · Coagulation and Flocculation Process Fundamentals 1 Coagulation and Flocculation . Groundwater and surface water contain both dissolved and suspended particles. Coagulation and flocculation are used to separate the suspended solids portion from the water. Suspended particles vary in source, charge, particle size, …
Get Price2021-3-22 · 1. Reticular Chemistry and MOFs. Reticular chemistry is a recently developed area in organic chemistry and material science, concerning the strategic and rational synthesis of new organic compounds by promoting the controlled growth and formation of regular, porous and crystalline structures [1,2].By choosing …
Get Price2018-8-9 · This study deals with the fabrication of polyacrylonitrile (PAN) nanofibers via an electrospinning process followed by stabilizing and carbonization in order to remove all non-carboneous matter and ensure a pure carboneous material. The as-spun PAN fibers were stabilized in air at 270°C for one hour and then carbonized …
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Get Price2015-3-26 · The phase inversion process was first introduced in membrane technology by Loeb and Sourirajan 47 in the 1960's and is the base for the synthesis of most commercially available membranes. During the phase inversion process, a thermodynamically stable polymer solution is transformed from a liquid into a solid …
Get Price2017-6-2 · Supercapacitors, as one of the energy storage devices, exhibit ultrahigh capacitance, high power density, and long cycle. High specific surface area, mechanical and chemical stability, and low cost are often required for supercapacitor materials. Graphene, as a new emerging carbon material, has attracted a lot of …
Get PriceINTRODUCTION. Poly(vinylidene fluorine) (PVDF) is a semi-crystalline polymer. The main macromolecular straight chain of PVDF is surrounded by fluorine and hydrogen atoms (–CH 2-CF 2 –). Its crystalline structure and spatial arrangement of CH 2 and CF 2 groups along the polymer chain result in excellent mechanical stability (Lui et …
Get Price2004-7-14 · The synthesis of composite particles with original morphologies resulting from the combination of an inorganic silica seed and polymer nodules is reported. To promote association between both components, the silica seeds are previously functionalized with an appropriate coupling agent carrying …
Get Price2008-12-19 · “The complexity inherent in carbon fiber composites is the very thing that adds value to structures made from carbon fiber,” says Steven Carmichael, director of sales and marketing for MRC subsidiary Grafil Inc. (Sacramento, Calif). “Like making fine wine, the right amount of patience, finesse and processing …
Get Price2019-8-29 · easy structural regulation [100] making it one of the most researched and applied compounds in protective coatings [101]. The adhesives include epoxy resin [102-104], methyl phenyl silicone resin [105], benzoxazine [106], hydroxyl acrylic resin [107], commercial spray adhesives, double-sided tape [108]. The fabrication process …
Get Price2017-11-21 · Shenvi, S., Ismail, A. & Isloor, A. M. Enhanced Permeation Performance of Cellulose Acetate Ultrafiltration Membranes by Incorporation of Sulfonated Poly (1, 4-phenylene ether ether sulfone) and ...
Get Price2012-4-4 · Poly(aryl ether ketone)s (PAEKs) are a class of important high-performance aromatic polymers that are used in the aerospace, electronic and nuclear fields. 28 Their excellent mechanical ...
Get Price2021-2-25 · obtained starting from cyclo- and poly-organophosphazenes and oxides such as SiO 2, TiO 2, Al 3O 2 and ZrO 2 by sol-gel process [9-12]. The aim of this study is to obtain some new composite membranes (M0-M8) based on an organo-substituted phosphazene/SiO 2 network by making use of solution casting …
Get PriceAbstract. In this work, we presented the synthesis and characterization of poly-melamine-formaldehyde-silica (PMF‑Si) composite from poly-melamine-formaldehyde (PMF) and previously purified commercial sodium silicate used as a precursor of silica nanoparticles (Si‑NPs).
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