Synthesis of nano-zeolite from coal fly ash and its potential for nutrient sequestration from anaerobically digested swine wastewater

Chen, Xiaoyan; Wendell, Khunjar; Zhu, Jun; Li, Jiangli; Xiang, Yu; Zhang, Zhijian

doi:10.1016/j.biortech.2012.01.096

Cited by 47 publications

(21 citation statements)

References 33 publications

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“…Many studies have focused on the addition of natural zeolites and clays for treating nitrogen-rich wastes [4] or their post-treatment to remove phenolic compounds [5]. Recently, the combination of anaerobic digestion and adsorption processes has led to using industrial clay residues [6], zeolites synthesised from coal fly ash [7], and low-cost adsorbents such as biochar [8] in an attempt to reduce the cost of the process.…”

Section: Introductionmentioning

confidence: 99%

Enhancing anaerobic digestion of poultry blood using activated carbon

Cuetos

Martínez

Moreno

et al. 2017

Journal of Advanced Research

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Section: Introductionmentioning

confidence: 99%

Enhancing anaerobic digestion of poultry blood using activated carbon

Cuetos

Martínez

Moreno

et al. 2017

Journal of Advanced Research

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“…The results showed that the highest removal rate (98.9% for P and 68.9% for NH 4 + -N) was reached at pH 9.3[24]. Chen et alused nano-zeolites synthesized from fly ash (ZFA) was used to simultaneously remove ammonium (N) and phosphate(P) in anaerobically digested swine wastewater [25]. N and P removal efficiencies ranged from 41% to 95% and 75% to 98%, respectively with a range of ZFA doses from 0.25 to 8 g/100 mL.…”

Section: Introductionmentioning

confidence: 99%

Study on the adsorption of nitrogen and phosphorus from biogas slurry by NaCl-modified zeolite

Cheng

et al. 2017

PLoS ONE

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A NaCl-modified zeolite was used to simultaneously remove nitrogen and phosphate from biogas slurry. The effect of pH, contact time and dosage of absorbants on the removal efficiency of nitrogen and phosphate were studied. The results showed that the highest removal efficiency of NH4+-N (92.13%) and PO43−-P (90.3%) were achieved at pH 8. While the zeolite doses ranged from 0.5 to 5 g/100 ml, NH4+-N and PO43−-P removal efficiencies ranged from 5.19% to 94.94% and 72.16% to 91.63% respectively. The adsorption isotherms of N and P removal with NaCl-modified zeolite were well described by Langmuir models, suggesting the homogeneous sorption mechanisms. While through intra-particle diffusion model to analyze the influence of contact time, it showed that the adsorption process of NH4+-N and PO43−-P followed the second step of intra-particle diffusion model. The surface diffusion adsorption step was very fast which was finished in a short time.

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“…So, the ion exchange reaction on a sodium zeolite is described as a chemical process involving valence forces through the sharing or exchange of electrons between zeolite sites with negative charge and ammonium cations as described by Eq. 8 [5,48]:…”

Section: Phosphate and Ammonium Isothermsmentioning

confidence: 99%

“…Therefore, it has become a great challenge addressed to the simultaneous removal of both species (phosphate and ammonium) to avoid the consequences of eutrophication processes. Natural and synthetic zeolites have been widely studied for ammonium removal due to its high cationic exchange property [1,3,4] and they have been postulated as promissory materials for its removal from waste waters [5][6][7][8]. Zeolites and their modified forms have been widely used as effective adsorbents for waste water treatment according to their mechanical and thermal properties, capability of cation-exchange and significant worldwide occurrence.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite

Guaya

Valderrama

Farrán

et al. 2015

Chemical Engineering Journal

252

114

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A natural zeolite (Z-N), rich in clinoptilolite, was modified (Z-Al) by incorporation of hydrated aluminum oxide (HAlO) for the simultaneous phosphate and ammonium removal. The incorporation of surface hydroxyl groups (≅Al-OH) into the zeolite structure, as active groups for phosphate removal, was characterized by acid-base titrations (pHPZC=4.5±0.2). The phosphate sorption increases from 0.6 mg-P/g for Z-N up to 7.0 mg-P/g while only a slight decrease on the ammonium sorption capacity from 33 mg-N/g of Z-N to 30 mg-N/g for Z-Al was observed. The HAlO modified zeolite sorption capacity for both phosphate and ammonium was slightly reduced by common ions typically present in secondary waste water effluents. Column experiments revealed higher enrichment factor for ammonium (120) than for phosphate (50) using 1 M NaOH as elution solution. A reduction of zeolite phosphate capacity with regeneration cycles was observed.

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Synthesis of nano-zeolite from coal fly ash and its potential for nutrient sequestration from anaerobically digested swine wastewater

Cited by 47 publications

References 33 publications

Enhancing anaerobic digestion of poultry blood using activated carbon

Enhancing anaerobic digestion of poultry blood using activated carbon

Study on the adsorption of nitrogen and phosphorus from biogas slurry by NaCl-modified zeolite

Simultaneous phosphate and ammonium removal from aqueous solution by a hydrated aluminum oxide modified natural zeolite

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