Effect of competing amines on the removal of tetramethylammonium hydroxide from solution using ion exchange

2016 ◽  
Vol 74 (2) ◽  
pp. 466-472 ◽  
Author(s):  
H. M. Citraningrum ◽  
Jhy-Chern Liu
Keyword(s):  
Ion Exchange ◽  
Density Functional ◽  
Liquid Crystal Display ◽  
Thin Film Transistor ◽  
Cation Exchange Resin ◽  
Strong Acid ◽  
Molecular Structures ◽  
Tetramethylammonium Hydroxide ◽  
Resin Matrix ◽  
Exchange Method

Tetramethylammonium hydroxide (TMAH, TMA+) has been widely used as the photoresist developer in semiconductor and thin film transistor liquid crystal display manufacturing. In this study, TMAH-containing wastewater was treated by ion exchange method. Strong acid cation exchange resin was used. A kinetics study revealed that the ion exchange reaction reached equilibrium within 20 min and it could be described by a pseudo-second-order model. To assess the effects of competing ions, wastewater was spiked with three different amines, namely ethylamine (EA+), diethylamine (DEA+), and triethylamine (TEA+). TMAH uptake decreased when in the presence of amines, and it decreased in the order EA+ < DEA+ < TEA+. It could be attributed to different proton affinity (PA) and the strength of affinity between amine molecules and resin matrix, as found from the ab initio calculation values and Langmuir isotherm parameters. However, the interaction energy between sulphonic acid groups and interfering amines in solution using density functional theory (DFT) calculation resulted in a different trend compared with that of PA. The difference might be caused by stabilization of amines by resin matrix and different molecular structures.

scholarly journals Techno-Economic Study of Copper Removal from Acid Mine Drainage by Ion-Exchange Technique

2013 ◽  
Vol 06 (2) ◽  
Keyword(s):  
Acid Mine Drainage ◽  
Ion Exchange ◽  
Mine Drainage ◽  
Cation Exchange Resin ◽  
Strong Acid ◽  
Economic Feasibility ◽  
Operating Conditions ◽  
Copper Removal ◽  
Exchange Method ◽  
Acid Mine

Economic feasibility has been studied for removal of copper from acid mine drainage wastewater by ion exchange. Ion exchange method has been used for removal of copper from industrial wastewaters. Experiments were conducted using packed bed column. The present study were carried out for solutions with concentrations of 100 mg/lit to 200 mg/lit and pH values of 3 to 6, using Indion 730, strong acid cation exchange resin. Under the present operating conditions considered, the strong acid type resin was found to bring down initial copper content by almost 46-56 % and at pH 5, 60% of copper removal for 200 mg/lit of initial concentration was found. The techno economic feasibility was then studied and the rate of return found to be 21% which is economically viable.

scholarly journals Removal of Hardness of Earth Alkaline Metals from Aqueous Solutions by Ion Exchange Method

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Gulten Cetin
Keyword(s):  
Ion Exchange ◽  
Water Solution ◽  
Exchange Process ◽  
Cation Exchange Resin ◽  
Hard Water ◽  
Strong Acid ◽  
Exchange Capacity ◽  
Exchange Method ◽  
Water Solutions ◽  
Calcium And Magnesium

An ion exchange process was introduced as an approach for softening of artificial hard water solutions. A strong acid cation exchange resin, Amberlite IR 120 [Na+], was used to reduce the hardness of water with the matrix of styrene-divinylbenzene copolymer having functional group as sulfonate. The ion exchange behavior of the ions of calcium and magnesium in synthetic solutions of hard water was investigated with the variables depending on pH, stirrer speed of the solutions and amount of the resin as a function of contact time between resin phase and hard water solution. The maximum ion exchange capacity was found to be 68 mg/g for Ca(II) and 12 mg/g for Mg(II) at pH 3.0. The method is a simple and efficient one to remove calcium and magnesium hardness from hard water solutions with the resin having more selectivity for calcium.

Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

1980 ◽  
Vol 63 (3) ◽  
pp. 460-461
Author(s):  
Saidul Z Qureshi ◽  
Fadhil M Najib ◽  
Fahmi A Mohammed
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Rapid Determination ◽  
Cation Exchange Resin ◽  
Water Soluble ◽  
Exchange Method ◽  
Strong Cation Exchange ◽  
Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

Collaborative Study of an Ion Exchange Method for Ephedrine in Ephedrine Sulfate Sirup NF

1969 ◽  
Vol 52 (4) ◽  
pp. 854-857
Author(s):  
Donald J Smith
Keyword(s):  
Hydrochloric Acid ◽  
Ion Exchange ◽  
Positive Charge ◽  
Exchange Resin ◽  
Collaborative Study ◽  
Cation Exchange Resin ◽  
Polystyrene Sulfonate ◽  
Resin Column ◽  
Exchange Method ◽  
Ion Exchange Method

Abstract An ion exchange procedure for Ephedrine Sulfate Sirup NF, based on the ability of ephedrine to be retained on a polystyrene sulfonate cation exchange resin column, was studied collaboratively by eight laboratories. The compound is held on the column by a positive charge located in the cationic center of the molecule, it is then eluted with hydrochloric acid, and its ultraviolet absorption is measured. The addition of 57.88 mg ephedrine sulfate to Ephedrine Sulfate Sirup NF resulted in recoveries of 58.39 and 57.72 mg, or 101 and 100%, respectively. Recoveries for collaborative samples, each containing 19.22 and 19.33 mg/5 ml, were 99.8 ± 1.83 and 101 ± 4.09%, respectively.

Combined ion exchange and adsorption equilibria of 5′-ribonucleotides on the strong acid cation exchange resin NH-1

2017 ◽  
Vol 92 (7) ◽  
pp. 1678-1689 ◽  
Author(s):  
Pengfei Jiao ◽  
Jinglan Wu ◽  
Yingying Wang ◽  
Jingwei Zhou ◽  
Wei Zhuang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Strong Acid ◽  
Adsorption Equilibria ◽  
Acid Cation

scholarly journals Ion-exchange method for recovery of In(III) from waste liquid crystal display panel

2011 ◽  
Vol 22 (3) ◽  
pp. 87-95
Author(s):  
Ryo INOUE ◽  
Tatsuo YAMADA ◽  
Takuya KAWAMURA ◽  
Tsuyoshi ARAI ◽  
Katsuhisa NAGAYAMA
Keyword(s):  
Liquid Crystal ◽  
Ion Exchange ◽  
Liquid Crystal Display ◽  
Exchange Method ◽  
Liquid Crystal Display Panel ◽  
Ion Exchange Method

An ion exchange atomic absorption method for the determination of ionized calcium at millimolar levels

1991 ◽  
Vol 69 (12) ◽  
pp. 1976-1979
Author(s):  
Amitha K. Hewavitharana ◽  
Vasantha Mutucumarana ◽  
Byron Kratochvil
Keyword(s):  
Ion Exchange ◽  
Atomic Absorption ◽  
Cation Exchange Resin ◽  
Strong Acid ◽  
Ionized Calcium ◽  
Free Calcium ◽  
Absorption Method ◽  
Atomic Absorption Method ◽  
Acid Type

A quantitative ion exchange/atomic absorption method is described for measuring the fraction of free calcium in solution at millimolar levels. Sample solutions are equilibrated with a micro-column of strong-acid type cation-exchange resin under electrolyte concentrations (0.75 mol/L NaNO3) high enough to provide conditions where the calcium sorbed on the resin is proportional to the free calcium in solution. After a water wash, the sorbed calcium is eluted from the resin with nitric acid directly into an atomic absorption spectophotometer. Free calcium levels were estimated using calibration curves obtained over the range 0–5 mM calcium with a precision of ± 0.05 mM. The effect of magnesium, at concentrations twice that of calcium, on measured calcium levels is negligible. The method is pH insensitive over the range 5–7. Selectivity for free calcium in the presence of complexing ligands such as citrate and phosphate is high. The method shows promise for the determination of ionized calcium in biological systems. Key words: ion exchange, atomic absorption, free calcium determination, ion speciation.

Ion Exchange Method for Phenylpropanolamine Hydrochloride in an Elixir

1970 ◽  
Vol 53 (1) ◽  
pp. 116-117
Author(s):  
Donald J Smith
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Positive Charge ◽  
Exchange Resin ◽  
Collaborative Study ◽  
Cation Exchange Resin ◽  
Sulfonated Polystyrene ◽  
Exchange Method ◽  
Phenylpropanolamine Hydrochloride ◽  
Ion Exchange Method

Abstract Phenylpropanolamine is retained on a sulfonated polystyrene cation exchange resin by the positive charge located in the cationic center of the molecule. Phenylpropanolamine hydrochloride is eluted from the column with 0.27N HCl and determined by UV absorption. Duplicate recoveries were 101 and 101%. The method is recommended for collaborative study.

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