Removal of Ammonia from Aqueous Solutions, Ground Water, and Wastewater Using Mechanically Activated Clinoptilolite and Synthetic Zeolite-A: Kinetic and Equilibrium Studies

Abukhadra, Mostafa R.; Abukhadra, Mostafa R.; Nasief, Fadya M.; El‐Salam, H. M. Abd

doi:10.1007/s11270-017-3643-7

Cited by 82 publications

(29 citation statements)

References 45 publications

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“…On the contrary, the pseudo-second model shows better fitting, for all the initial tested ammonium concentration, which is in agreement with previous research [29,72,73]. A fitting to the pseudo-second order reveals that chemisorptions dominate the adsorption process of ammonium on zeolite, and that this process involves three stages: (i) diffusion from the liquid state to the liquid-solid interface, (ii) movement of ammonium ions toward the solid surface, and (iii) movement of ammonium ions to the pores and channels of the zeolite [74]. the ammonium ions migrate from the zeolite's surface to its core (pores and channels) and when all the ion exchange processes are completed equilibrium state is achieved [70,71].…”

Section: Kinetic Modelssupporting

confidence: 90%

Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment

Kotoulas

Agathou

Triantaphyllidou

et al. 2019

Water

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The efficiency of natural zeolite to remove ammonium from artificial wastewater (ammonium aqueous solutions) and to treat second cheese whey was examined, aiming to recover nitrogen nutrients that can be used for further applications, such as slow-release fertilizers. Sorption experiments were performed using artificial wastewater and zeolite of different granulometries (i.e., 0.71-1.0, 1.8-2.0, 2.0-2.8, 2.8-4.0, and 4.0-5.0 mm). The granulometry of the zeolite had no significant effect on its ability to absorb ammonium. Nevertheless, smaller particles (0.71-1.0 mm) exhibited quicker NH 4 + -N adsorption rates of up to 93.0% in the first 10 min. Maximum ammonium removal efficiency by the zeolite was achieved at ammonium concentrations ranging from 10 to 80 mg/L. Kinetic experiments revealed that chemisorption is the mechanism behind the adsorption process of ammonium on zeolite, while the Freundlich isotherm model fitted the experimental data well. Column sorption experiments under batch operating mode were performed using artificial wastewater and second cheese whey. Column experiments with artificial wastewater showed high NH 4 + -N removal rates (over 96% in the first 120 min) for all granulometries and initial NH 4 + -N concentrations tested (200 and 5000 mg/L). Column experiments with second cheese whey revealed that natural zeolite can remove significant organic loads (up to 40%, 14.53 mg COD/g of zeolite) and NH 4 + -N (about 99%). For PO 4 3− -P, the zeolite appeared to saturate after day 1 of the experiments at a removal capacity of 0.15 mg P/g of zeolite. Desorption experiments with water resulted in low NH 4 + -N and PO 4 3− -P desorption rates indicating that the zeolite could be used as a substrate for slow nitrogen release in soils.

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Section: Kinetic Modelssupporting

confidence: 90%

Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment

Kotoulas

Agathou

Triantaphyllidou

et al. 2019

Water

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“…The use of ion exchange (IEX) systems for the selective removal of ammonium from wastewater is becoming increasingly attractive due to its high removal efficiency, low greenhouse gas emissions, competitive cost, and relative simplicity of operation 6 . The most effective IEX media are characterized by great selectivity for the target pollutant, high specific surface area and ability to be regenerated allowing for its re-use multiple times 7 . However, most of the recent studies concerning the IEX process for ammonium removal are limited to laboratory scale analysis 1 .…”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of zeolites for ammonium removal from municipal wastewater through ion exchange process

Guida

Potter²,

Jefferson

et al. 2020

Sci Rep

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the application of ion exchange process for ammonium (nH 4 +-n) removal from wastewater is limited due to the lack of suppliers of engineered zeolites which present high ammonium exchange capacity (Aec) and mechanical strength. this study focuses on the preparation and evaluation of synthetic zeolites (Zeolite1-6) by measuring AEC and resistance to attrition and compression, against natural (clinoptilolite) and engineered zeolite (reference, Zeolite-n). At high nH 4 +-N concentrations, Zeolite6 and Zeolite2 showed capacities of 4.7 and 4.5 meq NH 4 +-N/g media, respectively. In secondary effluent wastewater (initial nH 4 +-N of 0.7 meq NH 4 +-N/L), Zeolite1, 2 and 6 showed an AEC of 0.05 meq NH 4 +-N/g media, similar to Zeolite-N (0.06 meq NH 4 +-N /g media). Among the synthetic zeolites, Zeolite3 and 6 showed higher resistance to attrition (disintegration rate = 2.7, 4.1 NTU/h, respectively) when compared with Zeolite-N (disintegration rate = 13.2 NTU/h). Zeolite4 and 6 showed higher resistance to compression (11 N and 6 N, respectively). Due its properties, Zeolite6 was further tested in an ion exchange demonstration scale plant treating secondary effluent from a municipal wastewater treatment plant. However, Zeolite6 disintegrated after 2 months of operation, whilst Zeolite-N remained stable for 1.5 year. This highlighted the importance of the zeolite's mechanical strength for successful application. in particular, future work should focus on the optimization of the zeolite production process (temperature, time and dimension of the kiln during calcination) to obtain an engineered zeolite with a spherical shape thus reducing eventual sharp edges which can affect mechanical strength.

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“…Various results were obtained in previous studies to select natural and synthesized zeolites for the adsorption of various cations. The order of the cation adsorption priority was obtained as Na + > K + > Ca 2+ > Mg 2+ based on the study of Zhang et al (2016) and Shaban et al (2017).…”

Section: Investigate the Removal Of Nitrogen Compounds From The Effluent From The Stabilization Pondmentioning

confidence: 99%

Modeling of ammonia removal from wastewater using air stripping/modified clinoptilolite: reusability, optimization, isotherm, kinetic, and equilibrium studies

Fathi

Mohammadi

Yosefvand

et al. 2021

Int. J. Environ. Sci. Technol.

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Excess chemical and natural fertilizer could create eutrophication of surface waters and then depletion of the quality of water. The present study aimed to survey the removal efficiency of ammonia from aqueous solution using modified clinoptilolite and air stripping process and optimization of variables by response surface methodology. Clinoptilolite was obtained from Semnan (Northeast of Iran) and modified with sodium chloride (to create an adsorbent uniform) and ferric chloride (due to three valent of iron) as an efficient and simple method. The modified clinoptilolite was characterized by scanning electron microscopy, X-ray diffractometer, X-ray fluorescence, and Fourier transform infrared spectroscopy. Employing modified clinoptilolite as an adsorbent for ammonia removal showed that by increasing adsorbent dose, contact time, and pH and decreasing initial ammonia concentration, ammonia removal efficiency has been increased. In the optimum condition, modified clinoptilolite was able to adsorb ammonia as high as 86.04% at an adsorbent dose of 1 g/L, pH of 5, a contact time of 3.7 h, and an initial ammonia concentration of 13.27 mg/L. Also, the sorption capacity of ammonia at the optimum condition of air stripping was 96.14%. This process can properly treat the effluent of stabilization ponds as real wastewater (about 70% for ammonium removal), and the order of reduction effect for cations includes K + > Ca 2+ > Na + > Mg 2+ , respectively. The findings showed that ammonia removal followed the Freundlich isotherm and intraparticle diffusion kinetic model. According to the obtained results, as an effective and reusable adsorbent, modified clinoptilolite can be appropriately employed for ammonia removal from wastewater.

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Removal of Ammonia from Aqueous Solutions, Ground Water, and Wastewater Using Mechanically Activated Clinoptilolite and Synthetic Zeolite-A: Kinetic and Equilibrium Studies

Cited by 82 publications

References 45 publications

Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment

Zeolite as a Potential Medium for Ammonium Recovery and Second Cheese Whey Treatment

Preparation and evaluation of zeolites for ammonium removal from municipal wastewater through ion exchange process

Modeling of ammonia removal from wastewater using air stripping/modified clinoptilolite: reusability, optimization, isotherm, kinetic, and equilibrium studies

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