absorbent polymer Articles
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Economics of super absorbent polymers and waste stabilization
Economics of Super Absorbent Polymers & Waste Stabilization The use of super absorbent polymer (superabsorbent polymer or SAP) in waste stabilization offers many advantages over more conventional absorbents. These advantages include: • Minimal increase in waste volume or weight • Lower transport fees due to less loads • Lower total landfill disposal fees due since waste volume has not ...
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More durable or more vulnerable? - Effect of nanoparticles on long-term performance of polymeric nanocomposites during UV exposure
ZnO nanoparticle is being used as an inorganic UV absorber for polymers. However, the mechanism of how ZnO nanoparticles influence the photo degradation of polymersis is not well understood. This study has investigated the role of ZnO nanoparticles in the long-term performance of a polyurethane (PU) nanocomposite subject to UV radiation. PU samples containing different levels of ZnO nanoparticles ...
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More durable or more vulnerable? - Effect of nanoparticles on long–term performance of polymeric nanocomposites during UV exposure
ZnO nanoparticle is being used as an inorganic UV absorber for polymers. However, the mechanism of how ZnO nanoparticles influence the photo degradation of polymersis is not well understood. This study has investigated the role of ZnO nanoparticles in the long–term performance of a polyurethane (PU) nanocomposite subject to UV radiation. PU samples containing different levels of ZnO nanoparticles ...
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Plastic Additives: Polymer Stabilizers, Plasticizers and Lubricants
During the manufacturing of polymeric materials, such as plastics and rubbers, a number of chemical additives are added to inhibit or retard their degradation or to achieve better product quality. Heat stabilizers, antioxidant, UV absorber, plasticizers and lubricants are the most commonly seen and widely used additives. Heat stabilizers Heat stabilizers are mainly used for polyvinyl chloride and ...
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Decolourization performance in C. I. Vat Yellow 1 aqueous suspension using hydrophobically modified poly(acrylic acid)
A series of hydrophobically modified poly(acrylic acid) (PAA), poly(2-phenoxyethyl acrylate-co-acrylic acid) (poly(PHEA-co-AA)), have been synthesized and characterized by Ubbelohde type viscometry, Nuclear Magnetic Resonance (1H NMR) spectrometry and Differential Scanning Calorimetry (DSC). The shear thinning Non-Newtonian fluid behavior of their aqueous solution and the dependence on pH and ...
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Quantification of polymer concentration in water using UV-Vis spectroscopy
The goal of this study was to develop a method that uses UV-Vis spectroscopy for the determination of residual polymer concentration water and environmental samples. UV-Vis absorbance measurements are quick and simple and can be usefully applied in research and practice. Five different polymers exhibiting a wide range of polymer characteristics were tested in the UV range of 200–300 nm. ...
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Dewatering optimization with in-line and real-time measurement of polymer: results from full-scale treatment plants
Full-scale testing was carried out at two wastewater treatment plants to determine whether residual polymer concentration, measured by filtrate and centrate absorbance at 191 nm, can be used to identify the optimum polymer dose and achieve in-line and real-time dewatering optimization. The first plant uses high speed centrifuges and the second plant uses belt filter presses for dewatering. ...
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Unique sponge system contains water contaminants in storm drains
Untitled Document SmartSponge technology captures oil and hydrocarbons from stormwater runoff, preventing its discharge into receiving waters. Water quality is being bolstered in dozens of locations around the United States through the use of a rather simple system. The concept is simple – a polymer “sponge” that removes contaminants from water before it winds up passing ...
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Adsorption of four perfluorinated acids on non ion exchange polymer sorbents
Perfluorinated compounds (PFCs) have attracted global concern due to their ubiquitous distribution and properties of persistence, bio accumulation and toxicity. The process of adsorption has been identified as an effective technique to remove PFCs in water. Different non ion-exchange polymeric adsorbents were tested with regard to their sorption kinetics and isotherms at low PFCs concentrations. ...
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Removal of copper ions from aqueous solution by the sodium salt of the maleic acid-allylpropionate-styrene terpolymer
The sodium salt of the maleic acid-allylpropionate-styrene terpolymer was used for recovery of copper ions from aqueous solution. Effects of contact time, sorbent weight and initial Cu2+ ion concentrations on removal efficiency were tested. The maximum experimental sorption capacity of the sorbent for copper ions is 0.71 g g−1. The sorption isotherm of copper ions onto a prepared polymer ...
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A Brief Introduction to Non-Functional Excipients
Excipients are the general term for all materials in the prescription except the main active ingredients, such as binders, disintegrants, lubricants, fillers, etc. The choice of excipients for oral solid preparations is affected by factors such as the pharmacological and chemical properties of the raw materials, the preparation process and the price of excipients. There are non-functional ...
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All About Nafion Polymer
Perma Pure’s Nafion polymer is often referred the wonder material for its unique ability to transfer moisture from one side of the membrane to the other. This transfer occurs as a first order kinetic reaction making it highly selective. ...
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Chemical Plant Safety System Features Advanced Coriolis Meters
Global chemical company, BASF, opted for the new Coriolis meter technology as the centerpiece of its Freeport, Texas plant’s safety instrumented system (SIS). With its excellent price versus performance, smaller footprint, entrained gas management features, and in situ verification capabilities, the new flowmeter technology improves reliability and decreases downtime for critical process ...
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The characteristics and application scope of sound-absorbing cotton
The environmentally friendly polyester sound-absorbing cotton is developed with safe and non-toxic polymer chemical materials. It is harmless to the human body, does not cause any pollution to the environment, and is very convenient for regeneration. It is a new type of environmentally-friendly product with a leading position in the world, and it has been widely used in the construction industry, ...
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Nuclear Plant in southeastern United States case study
Turning Liquid Waste into Solid Money Savings using QUIK-SOLID© Project Background: A nuclear plant located in southeastern United States had to dispose of approximately 7,000 gallons (26,488 L) of liquid sludge that resulted from aggressive preventive maintenance activities. The plant stored the watery sludge in B-25 boxes (90 ft each). The slightly contaminated waste consisted of free ...
By CETCO
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