REACTIONS OF PHOSPHATE IN ALUMINUM SYSTEMS.: II. PRECIPITATION OF PHOSPHATE BY EXCHANGEABLE ALUMINUM ON A CATION EXCHANGE RESIN

1962 ◽  
Vol 42 (1) ◽  
pp. 210-221 ◽  
Author(s):  
Pa Ho Hsu ◽  
D. A. Rennie
Keyword(s):  
Experimental Data ◽  
Cation Exchange ◽  
Adsorption Isotherms ◽  
Close Agreement ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Precipitation Data ◽  
Adsorption Reaction ◽  
Exchangeable Aluminum ◽  
Phosphate Fixation

Experimental data are presented which show that exchangeable aluminum on resin precipitates phosphate from solutions. The precipitation data, however, conform to the Langmuir's and Freundlich's adsorption isotherms. The limitations of these adsorption isotherms in verifying an adsorption reaction are discussed. It is concluded that close agreement between the phosphate fixation data and the two isotherms may not necessarily imply an adsorption reaction in soils.

scholarly journals On the Reduction of Ammonia from the Waste of Alpine Houses

2005 ◽  
Vol 23 (1) ◽  
pp. 47-56
Author(s):  
Sameer Al-Asheh ◽  
Franz Bischof
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Langmuir Model ◽  
Suitable Material ◽  
The Alps

An evaluation of the effectiveness of the cation-exchange resin Amberlite IR-120 (AMIR 120) for removing ammonia from aqueous solutions and waste was made. Two types of waste were obtained from houses located in the Alps and used in this work. The results of the study showed that AMIR 120 may be considered as a suitable material for the removal of ammonia from aqueous and waste systems. The amount of ammonia removed increases with increasing AMIR 120 concentration. Sorption of ammonia decreases as the pH of the aqueous solutions increases. The Langmuir model represents the experimental data reasonably well.

Synthesis of 3,4-Dihydropyrano[c]chromenes Using Carbon Microsphere Supported Copper Nanoparticles (Cu-NP/C) Prepared from Loaded Cation Exchange Resin as a Catalyst

2019 ◽  
Vol 16 (2) ◽  
pp. 288-293
Author(s):  
Yogesh W. More ◽  
Sunil U. Tekale ◽  
Nitishkumar S. Kaminwar ◽  
László Kótai ◽  
Tibor Pasinszki ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cation Exchange ◽  
Copper Nanoparticles ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Environmentally Benign ◽  
High Yield ◽  
Carbon Microsphere ◽  
Catalytic Material ◽  
Operational Simplicity

Aim and Objective: The present study was performed with the aim to develop an efficient and environmentally benign protocol for the synthesis of biologically siginifcant 3, 4-dihydropyrano[c]chromenes using a new catalytic material. The protocol involves the use of a reusable, environment friendly materials and solvents with operational simplicity. Materials and Methods: Carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin were synthesized, characterized with well versed analytical techniques such as XRD, SEM and Raman spectroscopy and the synthesized material was used as a catalyst for the environmentally benign synthesis of 3,4-dihydropyrano[c]chromenes. Results: The formation of carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin was confirmed by XRD, SEM and Raman spectroscopy which was employed as a heterogeneous material for the synthesis of 3,4-dihydropyrano[c]chromenes. The products formed were characterized by the analysis of spectroscopic data - NMR, IR and mass. The safe catalytic system offers several advantages including operational simplicity, environmental friendliness, high yield, and reusability of catalyst and green chemical transformation. Conclusion: Herein we report an easy and efficient protocol for the one-pot synthesis of dihydropyrano[ c]chromenes using environmentally benign MCR approach in ethanol as the green solvent. The method developed herein constitutes a valuable addition to the existing methods for the synthesis of titled compounds.

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