5 edition of Practical principles of ion exchange water treatment found in the catalog.
Practical principles of ion exchange water treatment
Dean L. Owens
|Statement||by Dean L. Owens.|
|LC Classifications||TD468 .O94 1985|
|The Physical Object|
|Pagination||ix, 190 p. :|
|Number of Pages||190|
|LC Control Number||85051869|
Electroselectivity is due to the Donnan potential, which is the electric field between the exchanger and the electrolyte solution. In particular, cross-linked polystyrene is the polymer commonly used in ion exchange resins. The separation of neodymium and praseodymium was a particularly difficult one, and those were formerly thought to be just one element didymium - but that is an alloy of the two. It is anticipated that the unique inclusion of experiments and the broad coverage of the whole text should appeal to a wide readership and offer particular relevance to practitioners in schools, colleges, and industry.
If analytical methods are used to determine the total concentration of metal species e. Cooling system make-up will also benefit from reduced alkalinity. Chapter 1: introduction to water and its impurities Chapter 2: external water treatment processes Chapter 3: cooling water corrosion control Chapter 4: cooling water deposit control Chapter 5: microbiological control Chapter 6: industrial cooling water systems cleaning methods Chapter 7: open evaporative systems Chapter 8: once- through systems Chapter 9: closed systems Chapter corrosion inhibition in steam generating systems Chapter deposits in steam generating systems Chapter carry-over of boiler water Chapter high pressure boiler systems Chapter feed and control of internal treatment chemicals Review: Provides the reader with state-of-the-art information on water treatment topics. With a broad coverage this book addresses a wide spectrum of water treatment industrial practises. Contact time of the regenerant solution may have to be reduced. The advantages of SBA resin dealkalization is that low-cost salt is used in place of the acid necessary for the SAC strong acid cation and un-lined steel tanks can be used.
Synthetic inorganic exchangers can be classified into the following categories: zeolites, hydrous oxides, acidic salts of polyvalent metals, salts of heteropoly acids, hexacyanoferrates and other ionic compounds Baacke, Lieser, Weiss. Nuclear waste management is very expensive compared to waste management in the hydrometallurgic industry, so, very expensive synthetic exchangers can be used if the over-all process is still cost-effective. Cooling system make-up will also benefit from reduced alkalinity. Figure 3.
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Dealkalizationremoval of alkali ions from a glass surface.
Handbook of Industrial Water Conditioning 7th Edition. Jump to navigation Jump to search The dealkalization of water refers to the removal of alkalinity ions from water.
However, chemical treatment of polystyrene is required to give it ion exchange capability, and this treatment varies depending on whether the final product is to be an anion resin or a cation resin.
Courier Dover Publications. Next, the plutonium and uranium are available for making nuclear-energy materials, such as new reactor fuel and nuclear weapons. This depresses the pH value of the condensate returns and results in corrosive attack on the equipment and piping.
Activated carbon has been shown to have very effective sorption properties for Cd, Cr, Zn and Cu in sewerage waters Argo which can be considered to be as difficult a matrix as wastewater from the plating industry. The method is mostly based on the ability of special resins to adsorb metals in a low pH range Masahide.
Besides surface area and pore structure, the sorption behaviour of activated carbon is characterised also by the raw material, preparation and activation methods.
Styrene polymer chains Figure 2 are crosslinked with divinylbentzene DVB and the elasticity of resin can be adjusted by varying the Practical principles of ion exchange water treatment book of DVB it contains.
Both groups include synthetic and natural materials. Twenty-two experiments using inexpensive equipment are detailed, which not only complement a chapter dedicated to the characterization of organic exchangers, but also serve to illustrate several other pure and applied principles related to ion exchange phenomena.
Chapter 16; Waste water reclamation and reuse. Regenerating wasted water[ edit ] Most ion-exchange systems contain containers of ion-exchange resin that are operated on a cyclic basis.
As water passes through the anion resin the carbonate, bicarbonate and sulfate ions are exchanged for chloride ions. It is anticipated that the unique inclusion of experiments and the broad coverage of the whole text should appeal to a wide readership and offer particular relevance to practitioners in schools, colleges, and industry.
Zeolites with pore diameters less than the fully hydrated metal prefer cations with a hydrate layer which has the lowest possible stability.
However, a few general recommendations can Practical principles of ion exchange water treatment book made: Macroporous resins are normally not required for demineralisation or softening An exception: all styrenic WBA resins are macroporous Special particle sizes are required depending on the design technology: uniform or semi-uniform resins are necessary for packed beds special grades are required for stratified beds e.
These continuous systems need rather large amounts of resin compared to reciprocating flow systems, in which the resin is in a packed bed column and the column height is very short but the bed has a large diameter Brownthe reaction zone in the column covers a larger portion of the resin than in conventional packed bed column or in moving bed systems.
Mixed bed polishers after a primary demineralisation will run for several weeks before regeneration is required. A very important case of ion-exchange is the PUREX process Plutonium-URanium Extraction Processwhich is used to separate the plutonium and the uranium from americiumcuriumneptuniumthe radioactive fission products that come from nuclear reactors.
A typical example of application is preparation of high-purity water for power engineeringelectronic and nuclear industries; i. The net surface charge of proteins varies according to the surrounding pH. Treatment of drinking water. Filters and Filtration Handbook - Christopher Dickinson A practical guide for engineers, managers and specifiers, incorporating in volume essential and useful information on the physical water purification techniques filtration and separation.
Idealised image of water-softening process, involving replacement of calcium ions in water with sodium ions donated by a cation-exchange resin. Although in general the experimental conditions, such as metal concentration and pH, have a strong effect on the distribution coefficient, the KD value can be used as a comparative measure of the efficiencies of various exchangers and sorbents.
An important example of these are the picolylamine resins Figure 3 which form rather stable complexes at low pH ranges Grinstead. The ion exchange properties of zeolites and clay minerals are mainly based on the charge density and pore size of the materials.
Silicon is tetravalent and aluminium is trivalent, which results in negatively charged framework structures and thus each mole of aluminium produces one equivalent of cation exchange capacity for the zeolite framework.Water Treatment Technology Water Resources Engineering Civil Engineering ENGC Dr.
Fahid Rabah PhD. PE. Lecture 7: Ion Exchange PDF created with pdfFactory Pro trial version galisend.com 2 Ion Exchange 1. Principles of Ion Exchange galisend.comtion of Ion Exchange: Ion exchange is a unit process in which ions of a given speciesare.
Ion exchange is the exchange of charged mobile ions with a fixed ion. Ion exchange is most often used in water-softening and other purification and separation processes.
It has become more popular as more and more homes acquire water softeners to remove Ca2+ and Mg2+ from water.
Most water treatment IX processes operate in a continuous mode. Continuous ion exchange processes are usually of the down-flow and packed-bed column type.
When the resin capacity is exhausted, it is regenerated. Competition for ion exchange sites on a resin can greatly impact a given system¿s efficiency in removing contaminants.Treatment Principles.
Household water softeners are ion exchange pdf. Ion exchange involves removing the hardness ions calcium and magnesium and replacing them with non-hardness ions, typically sodium supplied by dissolved sodium chloride salt.
Application of Ion Exchange in Industrial Wastewaters by R.E. Pinkowski, DAC Download pdf exchange is a naturally occurring chemical process by which one ion in solution (typically aqueous but not exclusively) is exchanged for another.
A very common commercial application of this principle is found in many homes with a water softener.Find helpful customer reviews and ebook ratings for Practical Principles of Ion Exchange Water Treatment at galisend.com Read honest and unbiased product reviews from our users.5/5(1).