The ground water ammonium sorption onto Croatian and Serbian clinoptilolite

Šiljeg, Mario; Foglar, Lucija; Kukučka, Miroslav

doi:10.1016/j.jhazmat.2010.01.123

Cited by 40 publications

(8 citation statements)

References 40 publications

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“…Figure 12. Scheme of drinking water production plant (A) and pilot plant "filter guards" (B) (NZ-, MNZ-CRO natural and modified zeolite from Croatia; NZ-, MNZ-SRB natural and modified zeolite from Serbia) [102].…”

Section: Column Processmentioning

confidence: 99%

Natural Zeolites in Water Treatment – How Effective is Their Use

Margeta¹,

Logar²,

Šiljeg³

et al. 2013

Water Treatment

171

150

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/50738 IntroductionNatural zeolites are environmentally and economically acceptable hydrated aluminosilicate materials with exceptional ion-exchange and sorption properties. Their effectiveness in different technological processes depends on their physical-chemical properties that are tightly connected to their geological deposits. The unique treedimensional porous structure gives natural zeolites various application possibilities. Because of the excess of the negative charge on the surface of zeolite, which results from isomorphic replacement of silicon by aluminum in the primary structural units, natural zeolites belong to the group of cationic exchangers. Numerous studies so far have confirmed their excellent performance on the removal of metal cations from wastewaters. However, zeolites can be chemically modified by inorganic salts or organic surfactants, which are adsorbed on the surface and lead to the generation of positively charged oxihydroxides or surfactant micelles, and which enables the zeolite to bind also anions, like arsenates or chromates, in stable or less stable complexes. Natural zeolites have advantages over other cation exchange materials such as commonly used organic resins, because they are cheap, they exhibit excellent selectivity for different cations at low temperatures, which is accompanied with a release of non-toxic exchangeable cations (K + , Na + , Ca 2+ and Mg 2+ ) to the environment, they are compact in size and they allow simple and cheap maintenance in the full-scale applications. The efficiency of water treatment by using natural and modified zeolites depends on the type and quantity of the used zeolite, the size distribution of zeolite particles, the initial concentration of contaminants (cation/anion), pH value of solution, ionic strength of solution, temperature, pressure, contact time of system zeolite/solution and the presence of other organic compounds and anions. For water treatment with natural zeolites, standard procedures are used, usually a procedure in column or batch process. Ion exchange and adsorption properties of natural zeolites in comparison with other chemical and biological processes have the advantage of Water Treatment 82removing impurities also at relatively low concentrations and allows conservation of water chemistry, if the treatment is carried out in the column process [1]. Subject of further academic and industrial research should be to improve the chemical and physical stability of modified zeolites and to explore their catalytic properties, which would allow their use in catalytic degradation of organic pollutants. More careful consideration of their superb metal removal properties and awareness of possible regeneration or further use of contaminant/metal-loaded forms can considerably increase their environmental application possibilities, with a focus the reduction of high concentrations of cations and anions in drinking water and wastewater, for surface, und...

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Section: Column Processmentioning

confidence: 99%

Natural Zeolites in Water Treatment – How Effective is Their Use

Margeta¹,

Logar²,

Šiljeg³

et al. 2013

Water Treatment

171

150

View full text Add to dashboard Cite

show abstract

“…This suggests that nitrate remains at the soil surface due to the association with soil amendments, but it is leached from the soil surface in the control. These results are likely due to the fact that Cp and SMZ are cation [36,39] and anion exchangers [19,40], respectively. They are capable of adsorbing nitrogen in the forms of NH 4 + (by Cp) and NO 3 − (by SMZ) and then release it the manner of a slow-releasing fertilizer [12,37].…”

Section: Tablementioning

confidence: 99%

Influences of clinoptilolite and surfactant-modified clinoptilolite zeolite on nitrate leaching and plant growth

Malekian

Abedi‐Koupai

Eslamian

2011

Journal of Hazardous Materials

128

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“…Ammonium (NH 4 + ) is one of the major toxic compounds as well as a critical long-term pollutant in marine environments (Ip et al 2001), landfill leachate (Mangimbulude et al 2012), some factories (Harrington and McInnes 2009;Havens et al 2001), and groundwater (Siljeg et al 2010). As it is toxic to fish and causes eutrophication of lakes, rivers, and wetlands, NH 4 + contamination poses a serious environmental problem.…”

Section: Introductionmentioning

confidence: 99%

Microbial nitrogen transformation in constructed wetlands treating contaminated groundwater

Coban

Kuschk

Hipsey

et al. 2014

Environ Sci Pollut Res

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Pathways of ammonium (NH4 (+)) removal were investigated using the stable isotope approach in constructed wetlands (CWs). We investigated and compared several types of CWs: planted horizontal subsurface flow (HSSF), unplanted HSSF, and floating plant root mat (FPRM), including spatial and seasonal variations. Plant presence was the key factor influencing efficiency of NH4 (+) removal in all CWs, what was illustrated by lower NH4 (+)-N removal by the unplanted HSSF CW in comparison with planted CWs. No statistically significant differences in NH4 (+) removal efficiencies between seasons were detected. Even though plant uptake accounted for 32-100 % of NH4 (+) removal during spring and summer in planted CWs, throughout the year, most of NH4 (+) was removed via simultaneous nitrification-denitrification, what was clearly shown by linear increase of δ(15)N-NH4 (+) with decrease of loads along the flow path and absence of nitrate (NO3 (-)) accumulation. Average yearly enrichment factor for nitrification was -7.9 ‰ for planted HSSF CW and -5.8 ‰ for FPRM. Lack of enrichment for δ(15)N-NO3 (-) implied that other processes, such as nitrification and mineralization were superimposed on denitrification and makes the stable isotope approach unsuitable for the estimation of denitrification in the systems obtaining NH4 (+) rich inflow water.

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The ground water ammonium sorption onto Croatian and Serbian clinoptilolite

Cited by 40 publications

References 40 publications

Natural Zeolites in Water Treatment – How Effective is Their Use

Natural Zeolites in Water Treatment – How Effective is Their Use

Influences of clinoptilolite and surfactant-modified clinoptilolite zeolite on nitrate leaching and plant growth

Microbial nitrogen transformation in constructed wetlands treating contaminated groundwater

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