Zeolitic Ammonium Ion Exchange for Portable Hemodialysis Dialysate Regeneration

ASAIO Journal ◽  
1995 ◽  
Vol 41 (2) ◽  
pp. 221-226 ◽  
Author(s):  
John F. Patzer ◽  
Shang J. Yao ◽  
S. K. Wolfson
Keyword(s):  
Ion Exchange ◽  
Ammonium Ion

Effect of Heat Modification and Biofilm on Zeolite Adsorption Properties

2010 ◽  
Vol 439-440 ◽  
pp. 956-959 ◽  
Author(s):  
Hong Long ◽  
Jin Long Zuo
Keyword(s):  
Ion Exchange ◽  
Adsorption Capacity ◽  
Mean Value ◽  
Adsorption Properties ◽  
Ammonia Removal ◽  
Ammonium Ion ◽  
Modified Zeolite ◽  
Langmuir Isotherms ◽  
Bench Scale ◽  
And Diffusion

In order to improve ammonia removal capability from wastewater, zeolite was modified with heat and biofilm in this paper. The results showed that the adsorption capacity of heat modified zeolite could be reach mean value of 120.18meq/100g, which was 1.55 times than virgin zeolite. The results of bench scale experiments also showed that the data in the experiments were in line with Langmuir isotherms for ammonium ion absorbed onto heat modified zeolite. Moreover the biofilm which attached on the surface of heat modified zeolite only modified the surface feature of modified zeolite, while ion-exchange and diffusion procedure were not affected.

Clinoptilolite: a possible support material for nitrifying biofilms for effective control of ammonium effluent quality?

2005 ◽  
Vol 51 (11) ◽  
pp. 63-70 ◽  
Author(s):  
H. Inan ◽  
B. Beler Baykal
Keyword(s):  
Ion Exchange ◽  
High Capacity ◽  
Exchange Capacity ◽  
Quality Data ◽  
Ammonium Ion ◽  
Effective Control ◽  
Support Material ◽  
Ion Exchange Capacity ◽  
Effluent Quality ◽  
Peak Loads

Ammonium selective natural zeolite clinoptilolite is suggested as a possible support material for nitrifying biofilms to help improve effluent ammonium quality through its high capacity of ammonium removal in the process of ion exchange. This will especially be helpful in cases where the biofilter receives peak or variable loads routinely or occasionally. At the time of peak loads or shocks of ammonium, ion exchange capacity will provide a buffer for the effluent ammonium quality. Data to support this suggestion is presented.

scholarly journals Ammonium ion exchange and ammonia gas uptake on crystalline .ALPHA.-hafnium phosphate.

1986 ◽  
Vol 2 (4) ◽  
pp. 339-342
Author(s):  
Isao TOMITA ◽  
Yasuhiro KUSANO ◽  
Toshihiro NAKAMURA
Keyword(s):  
Ion Exchange ◽  
Ammonium Ion ◽  
Ammonia Gas ◽  
Gas Uptake

Evidence of ammonium ion-exchange properties of natural bentonite and application to ammonium detection

2013 ◽  
Vol 33 (8) ◽  
pp. 5084-5089 ◽  
Author(s):  
A. Zazoua ◽  
I. Kazane ◽  
N. Khedimallah ◽  
C. Dernane ◽  
A. Errachid ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Ammonium Ion ◽  
Exchange Properties

Comparison of Amberlite IRC-748 Resin and Zeolite for Copper and Ammonium Ion Exchange

2008 ◽  
Vol 53 (9) ◽  
pp. 2012-2017 ◽  
Author(s):  
Kathryn A. Mumford ◽  
Kathy A. Northcott ◽  
David C. Shallcross ◽  
Ian Snape ◽  
Geoff W. Stevens
Keyword(s):  
Ion Exchange ◽  
Ammonium Ion

Ammonium Removal from Aqueous Solutions Using an Ammonium Ion-Exchange Material, the Equilibrium Study

2011 ◽  
Vol 322 ◽  
pp. 102-107
Author(s):  
Lu Hua You ◽  
Xin Tan ◽  
Qiong Qiong Liu ◽  
Lin Zhao
Keyword(s):  
Ion Exchange ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Solution Concentration ◽  
Initial Solution ◽  
Ammonium Ion ◽  
Isotherm Models ◽  
Experimental Conditions ◽  
Initial Solution Concentration ◽  
Exchange Material

This article investigates the removal of ammonium from aqueous solutions using the ammonium ion-exchange material prepared by the modified kaolin. Batch tests were performed under a range of conditions to assess the effect of initial solution concentration, contact time and solution PH on the performance and capacity of the media for this application. The findings show that increasing initial solution concentration and contact time provide the best performance at an optimum PH of between 6 and 7 and the maximum ammonium adsorption capacity reaches at 79mgNH4+g-1 under the experimental conditions studied. Five isotherm models were used to describe the isotherm data. Three-parameter isotherm models (Redlich–Peterson and Langmuir–Freundlich) prove a better fit than two-parameter isotherm models (Langmuir, Freundlich and Temkin). These results indicate that the ammonium ion-exchange material is a promising material for cost-effective removal of ammonium from wastewater.

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