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

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.

scholarly journals Study on the Morphological Change and Reduction of Nitrogen and Phosphorous in Litter and Compost of Cowshed

2021 ◽  
Vol 33 (11) ◽  
pp. 2826-2830
Author(s):  
Daeik Kim ◽  
Sun-Jin Hwang ◽  
Youngjung Kim ◽  
Cheol Ho Jeong ◽  
Keon Sang Ryoo
Keyword(s):  
Morphological Change ◽  
Algal Bloom ◽  
Early Stage ◽  
Ammonium Ion ◽  
Nitrite Ion ◽  
Ammonia Gas ◽  
Phosphate Ion ◽  
Green Algal ◽  
Total Phosphorous ◽  
Ion Chromatograph

Litter and compost were obtained at a cowshed of a livestock farm in Andong city in Korea. The morphological change of nitrogen and phosphorous from these samples were examined and suggested a more useful and realistic way for reducing them. Constituents and their content of sample were identified by XRF. The nitrite ion (NO2 −), nitrate ion (NO2 −) and phosphate ion (PO4 3−) and ammonium ion (NH4 +), total phosphorous (T-P) and total nitrogen (T-N) released from sample were analyzed using ion chromatograph and UV/Vis spectrometry. As the results of this study, the ammonia in the early stage of cow excretion is a need to make an ammonia gas state that can be immediately volatile by increasing the pH. Nitrogen and phosphorous, the main source of nutrition in green algal bloom can be reduced by transforming insoluble salts such as calcium phosphate (CaHPO4·3H2O) and struvite (NH4MgPO4·6H2O), respectively, with addition of Ca and Mg after stimulating fermentation of compost.

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.

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

Biological treatment of ammonia gas at high loading

2004 ◽  
Vol 50 (4) ◽  
pp. 283-290 ◽  
Author(s):  
T. Kanagawa ◽  
H.W. Qi ◽  
T. Okubo ◽  
N. Tokura
Keyword(s):  
Removal Rate ◽  
Space Velocity ◽  
Packed Bed ◽  
Porous Ceramics ◽  
Ammonia Removal ◽  
Ammonium Ion ◽  
Nitrifying Bacteria ◽  
High Concentration ◽  
Ammonia Gas ◽  
Cylinder Diameter

The exhaust gas from compost processing plants contains a large amount of ammonia. To treat ammonia gas at high loads, bench-scale experiments were carried out. First, nitrifying bacteria were enriched from soil and immobilized on porous ceramics. The ceramics were packed in an acrylic cylinder (diameter, 100 mm; packed height, 190 mm) and ammonia gas was introduced to the top of the cylinder. The concentration and flow rate of ammonia gas were gradually increased and finally 85 ppm was introduced at a space velocity of 800 h-1 (empty bed residence time (EBRT), 4.5 sec). The ammonia load was 1.0 kg N/m3 day-1. The exhaust contained 1.5-2 ppm of ammonia. Then the packed ceramics were transferred to another acrylic cylinder (diameter, 50 mm; packed height, 800 mm). A high concentration of ammonia gas (1,000 ppm) was introduced at a space velocity of 96 h-1 (ammonia loading, 1.44 kg N/m3 day-1; EBRT, 37.5 sec). The exhaust contained 2 ppm of ammonia (removal rate, 99.8%). The packed bed was washed with water intermittently or continuously, and the wastewater from the cylinder contained a large amount of ammonium and nitrate ions of at a 1:1 ratio. Stoichiometric analysis showed that half of the introduced ammonia was oxidized to nitrate, and the rest was converted to ammonium ion. Thus, ammonia gas was effectively treated at a high load by biofiltration with nitrifying bacteria.

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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