An investigation into the adsorption removal of ammonium by salt activated Chinese (Hulaodu) natural zeolite: Kinetics, isotherms, and thermodynamics

Alshameri, Aref; Yan, Chunjie; Al-Ani, Yasir; Dawood, Ammar Salman; Ibrahim, Atef M.; Zhou, Chunyu; Wang, Hongquan

doi:10.1016/j.jtice.2013.05.008

Cited by 148 publications

(88 citation statements)

References 41 publications

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“…The authors investigated the elimination of ammonium by CLI from China and USA and stated that there is no change in the elimination or loading in a pH range of 5 or 6 to 9. However, with other zeolites, specific pH values were also found at which maximum elimination extents were achieved (pH 8: [42]; pH 7: [11,14,43]; pH 6: [13,16,44]; pH 4: [20]). The decrease in elimination of ammonium was in the same pH range where ammonium dissociates to uncharged ammonia, which was, thus, no longer available for ion exchange.…”

Section: Isoelectric State and Ph-dependent Adsorptionmentioning

confidence: 95%

“…While the ability of ammonium adsorption by zeolites was the focus of recent investigations, most of these investigations were carried out with one type of CLI from one specific deposit only [10,[14][15][16][17][18][19][20], focusing on the composition of the CLI, the adsorption/elimination of ammonium at different pH values, describing the adsorption process, the kinetics using different models, and evaluation of the thermodynamic properties of the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Different Clinoptilolite Zeolites as Adsorbent for Ammonium Removal from Highly Concentrated Synthetic Wastewater

Wasielewski

Rott

Minke

et al. 2018

Water

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Abstract:The supply of food to the growing world population requires an increasing amount of nitrogen fertilizers, which can be achieved both by the energy-intensive Haber-Bosch process and by recovering ammonium from wastewater. Within the scope of this work, it is investigated to what extent different clinoptilolites (CLIs) can be used as ion-exchangers for the removal of ammonium from highly concentrated solutions. To this end, finely ground CLIs with different grain sizes (EcoZeo 20 and CCP 20: 0-20 µm, Micro 200: 0-200 µm) were tested for their sorption properties by varying the parameters of the sorption solution (c 0 = 1000 mg NH 4 -N/L) such as pH, temperature, or contact time. All three CLIs tested were effective at adsorbing ammonium. In a pH range from 2 to 8, all CLIs were able to eliminate ammonium equally well. Furthermore, a contact time of 60 min was sufficient to achieve 84-88% of the maximum load. At a temperature of 34 • C, the highest loading was achieved (investigated range: 10-34 • C), indicating that the adsorption process of all CLIs was exergonic and endothermic. Especially for wastewater streams with high ammonium concentrations such as sludge water from wastewater treatment plants, CLI proved to be suitable to adsorb ammonium.

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Section: Isoelectric State and Ph-dependent Adsorptionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Evaluation of Different Clinoptilolite Zeolites as Adsorbent for Ammonium Removal from Highly Concentrated Synthetic Wastewater

Wasielewski

Rott

Minke

et al. 2018

Water

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“…Under normal circumstances, the spaces within the zeolite crystals are filled by water molecules and metal oxides that are regarded as impurities. The existence of empty spaces on the surface of the zeolites can enlarge the active surface so that the adsorption capacity becomes larger [16].…”

Section: Determination Of Adsorption Capacity and Cation Exchange Capmentioning

confidence: 99%

Hydrothermal Transformation of Natural Zeolite from Ende-NTT and Its Application as Adsorbent of Cationic Dye

2018

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A synthetic zeolite was produced from natural zeolite from Ende-Nusa Tenggara Timur (NTT) 17.289, 17.276, and 16.483 mg/g, respectively, and after hydrothermal they increased to 37.398, 37.369 and 37.362 mg/g, respectively. In addition, the CEC increased from 84.154, 81.042, and 77.474 cmol/kg, respectively, to 244.063, 216.354, and 211.432 cmol/kg, respectively 37,394, 37,365, dan 37,360 mg/g. Selain itu,15, 81,04, dan 77,47 cmol/kg meningkat menjadi 244,06, 216,35, dan 211,43 cmol/kg. Model Langmuir lebih sesuai untuk proses kesetimbangan adsorpsi isotermal.

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“…Generally, natural zeolite collected from different places has different characteristics. These unique characteristics of natural zeolite (NZ) are probably attributed to the differences in the geological formation of zeolite sources [8][9][10][11] . Therefore, each special zeolite material has its own special characteristics ADSORPTION OF CHROMIUM FROM AQUEOUS SOLUTIONS Yantus A.B Neolaka et al…”

Section: Introductionmentioning

confidence: 99%

“…and still requires to be observed individually 8 . Recently, the modified Ende-Flores Natural zeolite use hydrothermal method for adsorption a cationic dye have been reported 12 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

2017

Rasayan J Chem

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Natural zeolite collected from Ende-Flores Indonesia was characterized and activated with acid solution for Cr(VI) adsorption from aqueous solution. This natural zeolite is mainly composed of quartz and 50% mordenite. The kinetic adsorption modeling was fitted best with the pseudo-second-order model, whereas isotherm adsorption followed the Langmuir model with the maximum adsorption (Qmax) of NZ and ANZ are 0.189 mg/g and 1.040 mg/g. Moreover the ANZ was favorable for adsorption of Cr(VI) respectively.

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An investigation into the adsorption removal of ammonium by salt activated Chinese (Hulaodu) natural zeolite: Kinetics, isotherms, and thermodynamics

Cited by 148 publications

References 41 publications

Evaluation of Different Clinoptilolite Zeolites as Adsorbent for Ammonium Removal from Highly Concentrated Synthetic Wastewater

Evaluation of Different Clinoptilolite Zeolites as Adsorbent for Ammonium Removal from Highly Concentrated Synthetic Wastewater

Hydrothermal Transformation of Natural Zeolite from Ende-NTT and Its Application as Adsorbent of Cationic Dye

Adsorption of Hexavalent Chromium From Aqueous Solutions Using Acid Activated of Natural Zeolite Collected From Ende-Flores, Indonesia

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