In-situ preparation of NaA zeolite/chitosan porous hybrid beads for removal of ammonium from aqueous solution

Yang, Kai; Zhang, Xiang; Chao, Cong; Zhang, Bing; Liu, Jindun

doi:10.1016/j.carbpol.2014.02.001

Cited by 42 publications

(20 citation statements)

References 31 publications

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“…NZ, such as fly ash, Australian NZ, and Chinese NZ have been previously investigated, but low adsorption capacity was recorded 14, 16–18 . Several pre‐treatments have been done on NZ, activated natural zeolite (ANZ), and commercial zeolite including acid, base, salt, and organic surfactant treatments, before being used in NH 4 + removal 16, 18–20 . Heat treatment is known to be the best pre‐treatment due to the morphological structure changes, which do not require any chemicals.…”

Section: Introductionmentioning

confidence: 99%

Ammonium ion removal using activated zeolite and chitosan

Safie

Yaser

Hilal

2020

Asia-Pacific J Chem Eng

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Studies have previously been done on efficacies of chitosan and zeolite in ammonium ion (NH 4 + ) removal. However, no study compares the adsorption performance of natural zeolite (NZ) and activated NZ (ANZ) with high molecular weight chitosan (HMWC) and low molecular weight chitosan (LMWC).Hence, this study investigates the potentials of NZ, ANZ, LMWC, and HMWC in NH 4 + removal. The characteristics of NZ, ANZ, LMWC, and HMWC such as functional groups, surface morphology, elemental composition, zeta potential, and particle size was also investigated. The deposition of NH 4 + on the surface of NZ and ANZ was confirmed with the absence of nitrogen by the adsorption spectrum of energy dispersive X-ray (EDX) and supported by the presence of an Fourier transform infrared (FTIR) stretching band at 3,500-3,300 cm −1 , as well as broader and less intense bands~1,600 cm −1 after the adsorption for all the adsorbents. The particle size of LMWC, HMWC, NZ, and ANZ were 98, 813, 22,354, and 9,826 nm, respectively. Meanwhile, after the activation process, the composition of O, Si, Al, Fe, Ca, and Na was reduced. NH 4 + batch adsorption was also studied. HMWC, NZ, and ANZ reached adsorption equilibrium at 15 h, meanwhile for LMWC, the equilibrium reached at t = 20 h. The adsorption capacity of LMWC, HMWC, NZ, and ANZ at an initial concentration of 50 mg/L was 0.769, 0.331, 2.162, and 2.937 mg/g, respectively.

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Section: Introductionmentioning

confidence: 99%

Ammonium ion removal using activated zeolite and chitosan

Safie

Yaser

Hilal

2020

Asia-Pacific J Chem Eng

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“…Although the adsorption process is complex, the maximum adsorption quantities listed in Table indicate that Fe 3 O 4 @chitosan@Phe has higher adsorption capacity than Fe 3 O 4 @chitosan, suggesting that the modified phenylalanine can enhance the removal of humic acid. The value of 1/n for Fe 3 O 4 @chitosan@Phe are smaller than 1, it represented the favorable removal conditions . Therefore, the presence of phenylalanine results in superior properties of Fe 3 O 4 @chitosan@Phe for removal of humic acid.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Removal of Dissolved Humic Acid from Water Using Eco‐Friendly Phenylalanine‐Modified‐Chitosan Fe₃O₄ Magnetic Nanoparticles

Wang

et al. 2020

ChemistrySelect

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High-efficient adsorbents with eco-friendly and easy recycling features remain to be pursued in wastewater treatment. In this work, one green magnetic nano-composite, phenylalaninemodified-chitosan Fe 3 O 4 (Fe 3 O 4 @chitosan@Phe), was prepared and its adsorption behavior for humic acid from water was investigated. Our results showed that the modified phenylalanine could promote the maximum adsorption quantites of humic acid by Fe 3 O 4 @chitosan@Phe than Fe 3 O 4 @chitosan, and the adsorption processing followed the pseudo second-order kinetic model. Either the Langmuir or Freundlich isotherm model could not appropriately describe the adsorption proc-essing, implying the adsorption process is more complex than typical monolayer, or multilayer adsorption. The functional groups (amidogen, phenyl) of phenylalanine could strengthen the interaction between Fe 3 O 4 @chitosan@Phe and humic acid molecules through electrostatic interaction, π-π interaction, and hydrogen bonds. The Fe 3 O 4 @chitosan@Phe exhibited good reusability after running eight adsorption-regeneration cycles. This work proposes a new strategy to design eco-friendly magnetic adsorbents, which meets the requirement of modern green chemistry.

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“…In the interlayer of bentonite, the Si 4+ oxygen tetrahedral can be replaced by cations such as Na + , K + , and/or Ca 2+ and Al 3+ . The monovalent cations located within the interlayer space can exchange places with

{normalN normalH}_{4}^{+} ‐ normalN

present in the aqueous solution via ion exchange mechanism …”

Section: Resultsmentioning

confidence: 99%

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

Luna

Futalan²,

Jurado

et al. 2017

J of Applied Polymer Sci

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Wastewater containing high concentration of ammonium‐nitrogen ( normalNnormalH4+‐normalN) is not effectively addressed by biological treatment and when released into water bodies can cause eutrophication. In this study, the removal of normalNnormalH4+‐normalN from simulated wastewater using chitosan‐coated bentonite (CCB) was investigated. The effects of normalNnormalH4+ salt used, pH, CCB dosage, agitation rate, and temperature on the removal of normalNnormalH4+‐normalN were studied. The highest normalNnormalH4+‐normalN removal of 67.5% was attained at the following conditions: initial pH 4.0, CCB dose of 8.0 g, agitation rate of 150 rpm, and temperature of 35 °C. Fourier transform infrared analysis indicated two mechanisms: normalNnormalH4+‐normalN adsorption onto CCB involving hydrogen bonding with hydroxyl groups (OH) and ion exchange between normalNnormalH4+‐normalN and cations present in the interlayer of bentonite. Experimental data follows the pseudo‐second‐order kinetic model (R2 = 0.9964) and Koble–Corrigan isotherm (R2 = 0.9705). Thermodynamic studies showed that the adsorption process is spontaneous (ΔG0 < 0), endothermic (ΔH0 > 0) in nature, and leads to an increase in randomness at the solid–solution interface (ΔS0 > 0). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45924.

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In-situ preparation of NaA zeolite/chitosan porous hybrid beads for removal of ammonium from aqueous solution

Cited by 42 publications

References 31 publications

Ammonium ion removal using activated zeolite and chitosan

Ammonium ion removal using activated zeolite and chitosan

Enhanced Removal of Dissolved Humic Acid from Water Using Eco‐Friendly Phenylalanine‐Modified‐Chitosan Fe₃O₄ Magnetic Nanoparticles

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

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In-situ preparation of NaA zeolite/chitosan porous hybrid beads for removal of ammonium from aqueous solution

Cited by 42 publications

References 31 publications

Ammonium ion removal using activated zeolite and chitosan

Ammonium ion removal using activated zeolite and chitosan

Enhanced Removal of Dissolved Humic Acid from Water Using Eco‐Friendly Phenylalanine‐Modified‐Chitosan Fe3O4 Magnetic Nanoparticles

Removal of ammonium‐nitrogen from aqueous solution using chitosan‐coated bentonite: Mechanism and effect of operating parameters

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Enhanced Removal of Dissolved Humic Acid from Water Using Eco‐Friendly Phenylalanine‐Modified‐Chitosan Fe₃O₄ Magnetic Nanoparticles