Nitrate removal from aqueous solutions by ZnO nanoparticles and chitosan-polystyrene–Zn nanocomposite: Kinetic, isotherm, batch and fixed-bed studies

Keshvardoostchokami, Mina; Babaei, Shahin; Piri, Farideh; Zamani, Abbasali

doi:10.1016/j.ijbiomac.2017.03.162

Cited by 40 publications

(14 citation statements)

References 26 publications

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“…Apart from thermal applications, nanoparticle-salt interactions have already been studied and functionalization mechanisms have been proposed to be used in water treatment. In this area, oxide micro- and nanoparticles, nanoscale zerovalent material, carbon or graphene particles have been used as adsorbents to remove the nitrates, phosphates and cations of hazardous metals from water 22 – 26 . Adsorption is a surface phenomenon in which the physical adhesion of adsorbate occurs via the ionic and covalent interactions between that adsorbate and the functional groups present on the adsorbent surface.…”

Section: Introductionmentioning

confidence: 99%

On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

Mondragón

Juliá

Cabedo

et al. 2018

Sci Rep

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Nanoparticles have been used in thermal applications to increase the specific heat of the molten salts used in Concentrated Solar Power plants for thermal energy storage. Although several mechanisms for abnormal enhancement have been proposed, they are still being investigated and more research is necessary. However, this nanoparticle-salt interaction can also be found in chemical applications in which nanoparticles have proved suitable to be used as an adsorbent for nitrate removal given their high specific surface, reactivity and ionic exchange capacity. In this work, the ionic exchange capacity mechanism for the nanoparticles functionalization phenomenon was evaluated. The ionic exchange capacity of silica and alumina nanoparticles dispersed in lithium, sodium and potassium nitrates was measured. Fourier-transform infrared spectroscopy tests confirmed the adsorption of nitrate ions on the nanoparticle surface. A relationship between the ionic exchange capacity of nanoparticles and the specific heat enhancement of doped molten salts was proposed for the first time.

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Section: Introductionmentioning

confidence: 99%

On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

Mondragón

Juliá

Cabedo

et al. 2018

Sci Rep

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“…They have a high number of surface active sites, are earth-abundant, have minimal surface defects, and are metal-free. These green properties of chitosan-based polymer nanocomposites make them efficient nano sorbent materials for the environment [ 31 , 32 , 33 , 34 ]. Such biopolymer-based nanocomposites have emerged as a promising adsorption material for the uptake of mercury from wastewater and the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Based Polymer Nanocomposites for Environmental Remediation of Mercury Pollution

et al. 2023

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Mercury is a well-known heavy metal pollutant of global importance, typically found in effluents (lakes, oceans, and sewage) and released into the atmosphere. It is highly toxic to humans, animals and plants. Therefore, the current challenge is to develop efficient materials and techniques that can be used to remediate mercury pollution in water and the atmosphere, even in low concentrations. The paper aims to review the chitosan-based polymer nanocomposite materials that have been used for the environmental remediation of mercury pollution since they possess multifunctional properties, beneficial for the adsorption of various kinds of pollutants from wastewater and the atmosphere. In addition, these chitosan-based polymer nanocomposites are made of non-toxic materials that are environmentally friendly, highly porous, biocompatible, biodegradable, and recyclable; they have a high number of surface active sites, are earth-abundant, have minimal surface defects, and are metal-free. Advances in the modification of the chitosan, mainly with nanomaterials such as multi-walled carbon nanotube and nanoparticles (Ag, TiO2, S, and ZnO), and its use for mercury uptake by batch adsorption and passive sampler methods are discussed.

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“…The abrupt increase in population and industries have substantially increased the environmental pollution, particularly nitrates which contaminates the underground water resources leading to malicious damage [1], [2].The main sources of nitrate embraces a wide variety of waste water septic systems, different kinds of fertilizers, industrial sewage and animal manures [3], [4].…”

Section: Introductionmentioning

confidence: 99%

“…Nitrates certainly causes harm to the ecosystem and the various living organisms [2] leading to many contagious diseases including infant methemoglobinemia (blue baby syndrome) [1], [5], [6], [7], cancer [5], [6], [7], [8], [1], eutrophication [7], diabetes [8], etc,. The permissible limits for nitratenitrogen (NO3-N) in drinking water has been set by World Health Organization (WHO, 2008) and USEPA (EPA) as 50 mg/l and 10 mg/l, respectively [3]. Recently, the research related to the removal of nitrate from aquatic environment has been increased significantly.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, adsorption displays high efficiency and low cost which makes it the most suitable technique for nitrate removal [3], [25], [26], [27], [28]. Nanomaterials due to their very small sizes possess some of the unique properties like large surface area, high reactivity, easy synthesis, good electrical conductivity and high catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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New magnetic Co₃O₄/Fe₃O₄ doped polyaniline nanocomposite for the effective and rapid removal of nitrate ions from ground water samples

Bidhendi

Asadi

Bozorgian

et al. 2019

Env Prog and Sustain Energy

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In the present study, a new nanocomposite of iron/cobalt oxides and magnetic nanoparticle doped with polyaniline (PANI-Co3O4@MNPs) was synthesized and subsequently, evaluated for its potential in decontaminating nitrate ions from underground water. Various parameters such as pH, mass dosage, adsorption time, initial concentration and temperature important in obtaining optimum conditions required to attain maximum performance for the reported nanocomposite in nitrate removal were experimentally investigated. The important surface and chemical properties of PANI-Co3O4@MNPs including surface morphology and roughness, composition and chemical structure were evaluated using various spectroscopic techniques such as Field Emission Scanning Electron Microscope (FE-SEM), Energy-Dispersive X-ray spectroscopy (EDX) and Fourier Transform Infrared (FTIR). Finally, the removal of nitrate was assessed using kinetic, adsorption isotherm and thermodynamic studies to investigate the underlying mechanism of the removal process into PANI-Co3O4@MNPs sorbent. The kinetic studies and the adsorption isotherms have been well explained using pseudo first and the Freundlich models respectively whereas the thermodynamic parameters have been described in terms of enthalpy, entropy and Gibbs free energy which showed a negative value signifying that the adsorption process was exothermic and spontaneous in nature.

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Nitrate removal from aqueous solutions by ZnO nanoparticles and chitosan-polystyrene–Zn nanocomposite: Kinetic, isotherm, batch and fixed-bed studies

Cited by 40 publications

References 26 publications

On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

Chitosan-Based Polymer Nanocomposites for Environmental Remediation of Mercury Pollution

New magnetic Co₃O₄/Fe₃O₄ doped polyaniline nanocomposite for the effective and rapid removal of nitrate ions from ground water samples

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Nitrate removal from aqueous solutions by ZnO nanoparticles and chitosan-polystyrene–Zn nanocomposite: Kinetic, isotherm, batch and fixed-bed studies

Cited by 40 publications

References 26 publications

On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

Chitosan-Based Polymer Nanocomposites for Environmental Remediation of Mercury Pollution

New magnetic Co3O4/Fe3O4 doped polyaniline nanocomposite for the effective and rapid removal of nitrate ions from ground water samples

Contact Info

Product

Resources

About

New magnetic Co₃O₄/Fe₃O₄ doped polyaniline nanocomposite for the effective and rapid removal of nitrate ions from ground water samples