Ammonium removal using ion exchange and biological regeneration

Lahav, Ori; Green, Michal

doi:10.1016/s0043-1354(97)00453-3

Cited by 153 publications

(84 citation statements)

References 2 publications

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“…This relatively high adsorption capacity shows the strong electrostatic force of attraction between the ammonium molecules and the biosorbent bending-sites [30]. Furthermore, in order to situate the raw pinecone powder among the raw mineral adsorbents used to remove ammonium ions from aqueous solutions, a comparison based on Langmuir saturation capacity, Qm, has been made and indicated that the sawdust (0.165 mg/g) was not more efficient than soils (0.28, 0.9 mg/g) [31]; sawdust (1.7 mg/g) [5]; sepiolite (1.47 mg/g) [32] and some zeolites (0.9 mg/g) [21] (1.27 mg/g) [33], and could be considered as a promising material to remove ammonium even when compared with some efficient zeolites as Natural Chinese clinoptilolite (2.02 mg/g) [33], Chabazite (2.94 mg/g) [34]. It should be noted that our study used raw have a lower surface area.…”

Section: Freundlich Isothermmentioning

confidence: 99%

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Demirak¹,

Keskin²,

Şahin³

et al. 2015

Mugla Journal of Science and Technology

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Pine cone, a popular agricultural waste, was investigated as a novel ammonium biosorbent in its raw and sodium hydroxide modified form. Surface modification of pine cone powder were carried out using sodium hydroxide solution of concentarions (0,05 and 0,1mg/L) was described by a pseudo-second-order model predicting a chemisorption process. In addition, the equilibrium data were well characterized by the Langmuir isotherm model that confirmed the mono-layer coverage. The surface properties of raw pine cone powder and its sodium hydroxide modified form were analyzed by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) and powder X-ray diffraction (XRD). The chemical composition of pine cone powder before and after biosorption of ammonium is discussed in relation to the XRD and SEM-EDS results. The results showed that the surface of pine cone powder samples is modified by sodium hydroxide solution and the chemical composition of pine cone powder samples is changed after biosorption of ammonium. This from presents an interesting option for tertiary wastewater treatment (as a possible non-conventional biosorbent for the removal of ammonium

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Section: Freundlich Isothermmentioning

confidence: 99%

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Demirak¹,

Keskin²,

Şahin³

et al. 2015

Mugla Journal of Science and Technology

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“…In figure 3 that plotted from data in table 2 the rate of nitrification measured as mg N oxidized l -1 hr -1 is plotted vs. the concentration of MLVSS. [7,9,10]. This process is rapid and time required for regeneration depends very much upon the nitrifying activity of the sludge used.…”

Section: Characterization Of Clinoptilolitementioning

confidence: 99%

“…The capacity of zeolite and chemical regeneration for ammonium removal was investigated in several studies [3][4][5][6][7][8]. Usually, the service cycle is a down flow packed bed column followed by chemical regeneration (usually by NaCl).The major drawback of this process is the high cost of the chemical regeneration stage and disposal of the concentrated ammonium-sodium brain produced [9].…”

Section: Introductionmentioning

confidence: 99%

“…During the last years several investigators have been studied the biological regeneration of ion exchange systems [9][10][11][12][13]. These researches supported that the mechanism of regeneration is ion exchange and nitrification of displaced ammonium respectively.…”

Section: Introductionmentioning

confidence: 99%

“…These researches supported that the mechanism of regeneration is ion exchange and nitrification of displaced ammonium respectively. The process are carried out in two separate phase [9,11,12]: 1) Ion exchange stage: A column filled with zeolite is used for ammonium ion exchange from secondary effluent. When NH 4 concentration breakthrough occurs, the bioregeneration stage after backwashing the bed started.…”

Section: Introductionmentioning

confidence: 99%

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Use of ion exchange for removal of Ammonium: A biological regeneration of zeolite

2013

Global NEST Journal

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Nitrogen in the Ammonia form can have deleterious effects in water resources. Ion Exchange by zeolite and biological Nitrification processes are two proposed methods for removing Nitrogen compounds from wastewater and effluents. The main objective of this research was to investigate the efficiency of nitrifying bacteria for regenerating Clinoptilolite zeolite. In this research, the Semnan Clinoptilolite zeolite was supplied in mesh 30. Then the capacity of zeolite in ammonium removal was determined in column system. To cultivate of nitrifying bacteria a sludge sample was taken from a domestic wastewater treatment plant and added to a 15 l aeration tank. Ammonium and other nutrients were added in the reactor daily over a month period and the effect of nitrate anion and MLVSS on nitrification process have been determined. After saturation of zeolite with ammonium, biological regeneration was done by contact of zeolite and nitrifying bacteria in column system. In this stage slurry of nitrifying bacteria is pumped up flow through the zeolite column and recycled to the aeration tank. The effluent containing the displaced ammonium is oxidized to nitrate by the nitrifying bacteria. Then the nitrified brine is clarified in a sedimentation tank and stored for reuses.The results showed that the cation exchange capacity was 10.06 (in breakthrough point) and 18.38 mg NH 4 + g -1 zeolite as total capacity. The results indicated that nitrification accelerated by increasing in MLVSS concentration and concentration of nitrate remains in solution. The results obtained from bioregeneration tests of zeolite showed that the efficiency was 87.7 to 99.8% in period of 3.5 to 5.5 hours. Based on the results, since regeneration is achieved in high concentration of nitrate, the use of nitrifying sludge in several cycles is possible and the use of system can be appreciated to an alternative economical method for removing NH 4 + from effluent.

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Selective Recovery of Ammonia Nitrogen from Wastewaters with Transition Metal‐Loaded Polymeric Cation Exchange Adsorbents

Clark

Tarpeh

2020

Chemistry A European J

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Extracting valuable products from wastewaters with nitrogen-selective adsorbentsc an offset energy-intensive ammonia production, rebalance the nitrogen cycle, and incentivize environmental remediation. Separating nitrogen (N) as ammoniumf rom other wastewater cations (e.g.,K + , Ca 2 +)p resents am ajor challenge to Nr emovalf rom wastewater and Nr ecoverya sh igh-purityp roducts. High selectivity and capacity were achieved through ligand exchange of ammonia with ammine-complexing transition metalsl oaded onto polymeric cation exchange resins. Compared to commercial resins,m etal-ligande xchange adsorbents exhibited higher ammonia removalc apacity (8 mequivg À1)a nd selectivity (N/K + equilibrium selectivity of 10.1) in binary equimolar solutions. Considering optimal ammonia concentrations (200-300mequivL À1)a nd pH (9-10) for metal-ligand exchange, hydrolyzed urine wasi dentified as ap romising candidate for selectiveT AN recovery.H owever,d ivalent cation exchange increased transition metal elutiona nd reduced ammonia adsorption.U ltimately,m etal-ligand exchange adsorbents can advance nitrogen-selective separations from wastewaters.

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Ammonium removal using ion exchange and biological regeneration

Cited by 153 publications

References 2 publications

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Use of ion exchange for removal of Ammonium: A biological regeneration of zeolite

Selective Recovery of Ammonia Nitrogen from Wastewaters with Transition Metal‐Loaded Polymeric Cation Exchange Adsorbents

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