Emergency membrane contactor based absorption system for ammonia leaks in water treatment plants

Shao, Jiahui; Fang, Xuliang; He, Yiliang; Jin, Qiang

doi:10.1016/s1001-0742(08)62208-1

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…4 (i.e no feed temperature and no feed pH increase), the optimum acid strength was 0.01 M and 0.02 M for H 2 SO 4 and H 3 PO 4 solutions respectively. A similar optimal value has been delivered elsewhere [30]. This acid concentration should be increased if we increase the feed pH and temperature because both pH and temperature increase the ammonia availability in the feed side.…”

Section: Effect Of Permeate Acid Molar Concentrationmentioning

confidence: 59%

“…This is mainly because in weak acid the pH quickly increased and induced the transmembrane pH gradient reduction which ultimately reduced the ammonia mass-transfer [24]. Whereas in the case of using a strong acid, permeate side viscosity and concentration polarization significantly increased thereby reducing the ammonia migration through the hydrophobic membrane [30]. Hence, we can deduce that for certain specific HFMC operating conditions, there is always an optimum permeate acid concentration at which the ammonia mass transfer rate hits its maximum value.…”

Section: Effect Of Permeate Acid Molar Concentrationmentioning

confidence: 99%

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Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: Effects of permeate chemistry

Damtie

Volpin

Yao

et al. 2020

Environmental Engineering Research

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The production of the existing nitrogen fertilizer is costly and less environmental-friendly. Various green technologies are currently emerging toward providing alternative options. In this study, a liquid/liquid hydrophobic hollow-fiber membrane contactor was employed at ambient temperature and natural urine pH ~ 9.7 to recover ammonium fertilizers from human urine. Results showed that permeate side chemistry was one of the major factors affecting the ammonia mass transfer. The study on the ammonia capturing performance of diluted sulfuric acid, phosphoric acid, nitric acid, and DI water confirmed that acid type, acid concentration, and permeate side operating pH were the most important parameters affecting the ammonia capturing tendency. Sulfuric acid was slightly better in capturing more ammonia than other acid types. The study also identified increasing acid concentration didn’t necessarily increase ammonia mining tendency because there was always one optimum concentration value at which maximum ammonia extraction was possible. The best permeate side operating pH to extract ammonia for fertilizer purposes was selected based on the dissociation equilibrium of different types of acids. Accordingly, the analysis showed that the membrane process has to be operated at pH > 3 for sulfuric acid, between 3.5 to 11.5 for phosphoric acid, and above 0.5 for nitric acid so as to produce their respective high-quality liquid ammonium sulfate, ammonium monophosphate/diphosphate, and ammonium nitrate fertilizer. Therefore, permeate side acid concentration, pH, and acid type has to always be critically optimized before starting the ammonia mining experiment.

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Section: Effect Of Permeate Acid Molar Concentrationmentioning

confidence: 59%

Section: Effect Of Permeate Acid Molar Concentrationmentioning

confidence: 99%

Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: Effects of permeate chemistry

Damtie

Volpin

Yao

et al. 2020

Environmental Engineering Research

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“…Ammonia (NH 3 ) is the primary factor of particulate matter 2.5 (PM 2.5), which can combine with NO x and SO x in the atmosphere to generate secondary inorganic particles, such as ammonium sulfate and ammonium nitrate, , leading to serious environmental pollution and proving harmful to human health. − On the other hand, NH 3 is also an important chemical raw material and is widely applied in different fields such as fertilizers, nitric acid, and pharmaceuticals. , The main technology of NH 3 removal and recovery used in industries is water scrubbing. − Nevertheless, water scrubbing needs high energy consumption for NH 3 regeneration and produces a large amount of ammonia–nitrogen wastewater. ,− Therefore, the novel technology of NH 3 separation and recovery is of great significance for green and sustainable development. , …”

Section: Introductionmentioning

confidence: 99%

Mesoporous Multiproton Ionic Liquid Hybrid Adsorbents for Facilitating NH₃ Separation

Zeng

Zheng

et al. 2023

Ind. Eng. Chem. Res.

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Ionic liquids (ILs), as promising candidates for ammonia (NH3) separation and recovery, have attracted extensive attention due to their extremely low pressures, high gas affinity, and adjustable structures. However, the development of new absorbents or adsorbents for highly efficient, fast, and reversible separation is still a great challenge. In this work, multiproton ILs (MPILs) by simultaneously introducing two or more −H, −OH, or −SO3H sites into the cations were designed to enhance NH3 uptake, and the MPIL N,N,N′,N′-tetrakis (2-hydroxyethyl)ethylenediamine trifluoromethane sulfonate ([EdteH6][TfO]2) with four −OH and two −H sites exhibited a superhigh capacity of 5.08 mol NH3·(mol IL)−1 at 40 °C and 1 bar. To solve the slow gas–liquid mass transfer due to the high viscosity of MPILs, the designed MPILs were highly dispersed onto the molecular sieve HZSM-5 with abundant pore structures to prepare a series of porous MPIL-based hybrid adsorbents for NH3 adsorption. The highest capacity of 140.42 mg NH3·(g adsorbent)−1 at 30 °C and 1 bar was achieved by 60 wt % [EdteH6][TfO]2@HZSM-5-60 (HZ60) due to multiple hydrogen bonding and mesopore effects, which is superior to all of the nonmetal IL-based adsorbents reported to date. Meanwhile, the 60 wt % [EdteH6][TfO]2@HZ60 also exhibited high NH3/CO2 and NH3/N2 selectivities, which are almost 16 and 14 times greater than that of pure HZ60, respectively, along with excellent reversibility. This work provides a feasible way to design novel porous IL-based adsorbents for gas separation and recovery.

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“…Despite many commonly used water treatment techniques, innovative, cost-effective methods are still deeply needed. Effective wastewater treatment can be performed with many different techniques, including membrane separation (Li 2014 ; Wu et al 2012 ), adsorption (Boi 2016 ; Nadour et al 2019 ; Shao et al 2008 ; Phuong et al 2022 ; Olusegun et al 2023a , b ), photocatalytic oxidation (Rezaei et al 2021 ), electrochemical methods (Alnajrani and Alsager 2020 ; Spaltro et al 2020 ), biopolymer sorption (Zhou et al 2016 ; Zhou et al 2017a , b ), photodegradation (Hussain et al 2020 ; López Zavala and Espinoza Estrada 2016 , Nagamine et al 2020 , Olusegun et al 2023b ), biosorption (Zhou et al 2019 ), and biodegradation (Wang et al 2020 ). Among them, adsorption-based processes are considered the most effective, also offering cost-effectiveness, simplicity of preparation, and high customizability (Rashed 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Green composites based on volcanic red algae Cyanidiales, cellulose, and coffee waste biomass modified with magnetic nanoparticles for the removal of methylene blue

Pietrzyk

Borowska

Hejduk

et al. 2023

Environ Sci Pollut Res

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In this paper, green nanocomposites based on biomass and superparamagnetic nanoparticles were synthesized and used as adsorbents to remove methylene blue (MB) from water with magnetic separation. The adsorbents were synthesized through the wet co-precipitation technique, in which iron-oxide nanoparticles coated the cores based on coffee, cellulose, and red volcanic algae waste. The procedure resulted in materials that could be easily separated from aqueous solutions with magnets. The morphology and chemical composition of the nanocomposites were characterized by SEM, FT-IR, and XPS methods. The adsorption studies of MB removal with UV-vis spectrometry showed that the adsorption performance of the prepared materials strongly depended on their morphology and the type of the organic adsorbent. The adsorption studies presented the highest effectiveness in neutral pH with only a slight effect on ionic strength. The MB removal undergoes pseudo-second kinetics for all adsorbents. The maximal adsorption capacity for the coffee@Fe3O4–2, cellulose@Fe3O4–1, and algae@Fe3O4–1 is 38.23 mg g−1, 41.61 mg g−1, and 48.41 mg g−1, respectively. The mechanism of MB adsorption follows the Langmuir model using coffee@Fe3O4 and cellulose@Fe3O4, while for algae@Fe3O4 the process fits to the Redlich-Peterson model. The removal efficiency analysis based on UV-vis adsorption spectra revealed that the adsorption effectiveness of the nanocomposites increased as follows: coffee@Fe3O4–2 > cellulose@Fe3O4–1 > algae@Fe3O4–1, demonstrating an MB removal efficiency of up to 90%.

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Emergency membrane contactor based absorption system for ammonia leaks in water treatment plants

Cited by 8 publications

References 5 publications

Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: Effects of permeate chemistry

Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: Effects of permeate chemistry

Mesoporous Multiproton Ionic Liquid Hybrid Adsorbents for Facilitating NH₃ Separation

Green composites based on volcanic red algae Cyanidiales, cellulose, and coffee waste biomass modified with magnetic nanoparticles for the removal of methylene blue

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Emergency membrane contactor based absorption system for ammonia leaks in water treatment plants

Cited by 8 publications

References 5 publications

Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: Effects of permeate chemistry

Ammonia recovery from human urine as liquid fertilizers in hollow fiber membrane contactor: Effects of permeate chemistry

Mesoporous Multiproton Ionic Liquid Hybrid Adsorbents for Facilitating NH3 Separation

Green composites based on volcanic red algae Cyanidiales, cellulose, and coffee waste biomass modified with magnetic nanoparticles for the removal of methylene blue

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Product

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About

Mesoporous Multiproton Ionic Liquid Hybrid Adsorbents for Facilitating NH₃ Separation