Ion exchange uptake of ammonium in wastewater from a Sewage Treatment Plant by zeolitic materials from fly ash

The potential value of zeolitic materials (ZM) obtained from a hazardous waste, such as coal fly ash, for the retention of NH 4 + present in liquid effluents from a Sewage Treatment Plant (STP) is studied. A wastewater sample was taken from an STP in Zaragoza (Spain) after conventional treatment at...

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Bibliographic Details
Published in:Journal of hazardous materials 2009-01, Vol.161 (2), p.781-786
Main Authors: Juan, Roberto, Hernández, Susana, Andrés, José M., Ruiz, Carmen
Format: Article
Language:English
Subjects:
Adsorption
Ammonium removal
Applied sciences
Calcium - chemistry
Carbon
Cation exchange
Cations
Chemical engineering
Coal Ash
Exact sciences and technology
General purification processes
Hydrogen-Ion Concentration
Ion Exchange
Particulate Matter
Pollution
Powders
Quaternary Ammonium Compounds - chemistry
Sewage
Sewage treatment
Sewerage works: sewers, sewage treatment plants, outfalls
Temperature
Time Factors
Urban wastewater
Waste Disposal, Fluid - methods
Wastewaters
Water Pollutants, Chemical - chemistry
Water Purification - methods
Water treatment and pollution
Zeolites - chemistry
Zeolitic materials
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Summary:The potential value of zeolitic materials (ZM) obtained from a hazardous waste, such as coal fly ash, for the retention of NH 4 + present in liquid effluents from a Sewage Treatment Plant (STP) is studied. A wastewater sample was taken from an STP in Zaragoza (Spain) after conventional treatment at the Plant. The water was treated with different amounts of three ZM: NaP1 zeolite, K-F zeolite and K-Chabazite/K-Phillipsite zeolites all of them in powdered and granulated state. The wastewater was treated by two kinds of processes: continuous stirring batch experiments with powdered ZM, and fixed packed bed of granulated ZM in a column. The powdered materials reduced about 80% of NH 4 + from wastewater, even in the presence of Ca 2+, which competes with NH 4 + for the cation exchange sites in zeolites. Around 70% of NH 4 + reduction was achieved with granulated materials. In both cases, moderate ZM/wastewater ratios had to be used to achieve those results, with K-zeolites slightly less effective in NH 4 + retention.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2008.04.025