Document Detail

Ammonium and potassium removal for anaerobically digested wastewater using natural clinoptilolite followed by membrane pretreatment.
MedLine Citation:
PMID:  17604906     Owner:  NLM     Status:  MEDLINE    
On the basis of the wastewater characteristic of anaerobically digested wastewater, this work studied the individual and simultaneous adsorption of ammonium and potassium ions by the natural clinoptilolite. Langmuir, Freundlich, Langmuir-Freundlich, and Toth model were employed to fit the experimental isotherm data and the fitting performances of different models were compared. Both the individual and simultaneous adsorption kinetics of ammonium and potassium were studied at various pHs and temperatures. The individual adsorption of ammonium was very fast and potassium uptake was even faster than that of ammonium. The adsorption approached equilibrium within 1h in most cases. Five models, including pseudo-first-order, pseudo-second-order, Vermeulen's model, squared driving force model and Elovich equation were used to fit the individual and simultaneous adsorption kinetics of ammonium and potassium. The validities of the fittings for the ammonium and potassium adsorption kinetics were also evaluated.
Xuejun Guo; Le Larry Zeng; Xiaomei Li; Hung-Suck Park
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Publication Detail:
Type:  Journal Article     Date:  2007-05-26
Journal Detail:
Title:  Journal of hazardous materials     Volume:  151     ISSN:  0304-3894     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-01-24     Completed Date:  2008-04-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  125-33     Citation Subset:  IM    
Environmental Technologies, Alberta Research Council Inc. Vegreville, Alberta T9C 1T4, Canada.
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MeSH Terms
Bacteria, Anaerobic / metabolism
Models, Chemical
Potassium / chemistry,  isolation & purification*
Quaternary Ammonium Compounds / chemistry,  isolation & purification*
Waste Disposal, Fluid / methods*
Zeolites / chemistry*
Reg. No./Substance:
0/Quaternary Ammonium Compounds; 12173-10-3/clinoptilolite; 1318-02-1/Zeolites; 7440-09-7/Potassium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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