Engineered nanomaterials and their surface functionalization for the removal of heavy metals: A review

Jawed, Aquib; Saxena, Varun; Pandey, Lalit M.

doi:10.1016/j.jwpe.2019.101009

Cited by 222 publications

(82 citation statements)

References 218 publications

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“…), tetraethyl ortosilicate (TEOS) (Merck >99%, for synthesis), absolute ethanol (Riedel-de Haen, 99.8% vol. ), NH 3 (Silan Trading 25%) were used without further purification. The structure and phase composition of the particles was determined by X-ray diffraction (XRD), using an Ultima IV (RIGAKU) instrument operating with Cu K radiation.…”

Section: Methodsmentioning

confidence: 99%

“…Among these, magnetic iron oxide nanoparticles emerged not only for their good adsorption properties, but also for the possibility of easy removal from aqueous systems [3]. Iron oxide magnetic nanoparticles (MNPs), indeed, were shown to have large surface areas with many active sites for adsorption of metal ions, good selectivity and low toxicity [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…However, due to their hydrophobic surfaces, aggregation occurs in aqueous media, which lowers the efficiency of adsorption [8]. Therefore, 2 of 18 coating with organic or inorganic shells with porous, amorphous or ordered structures was carried out by several groups [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Silica-Coated Magnetic Nanocomposites for Pb2+ Removal from Aqueous Solution

et al. 2020

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Magnetic iron oxide-silica shell nanocomposites with different iron oxide/silica ratio were synthesized and structurally characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), small-angle neutron scattering, magnetic and N 2 -sorption studies. The composite that resulted with the best properties in terms of contact surface area and saturation of magnetization was selected for Pb 2+ adsorption studies from aqueous media. The material presented good absorption capacity (maximum adsorption capacity 14.9 mg·g −1 ) comparable with similar materials presented in literature. Its chemico-physical stability and adsorption capacity recommend the nanocomposite as a cheap adsorbent material for lead.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silica-Coated Magnetic Nanocomposites for Pb2+ Removal from Aqueous Solution

et al. 2020

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“…There were several reported studies of metallic nanoparticles immobilization on membrane (e.g., chitosan, cellulose acetate, polysulfones, etc.) for dichlorination, degradation of a toxic substance which contains novel properties such as, hindrance of nanoparticles, high reactivity, absence of agglomeration and surface reduction [132,133]. Palladium acetate and polyetherimide both are used to prepare nanocomposite films and a novel type interaction is present among hydrogen and Pd nanoparticles in order to improve water treatment efficiency [134].…”

Section: Nanomembranesmentioning

confidence: 99%

Role of Nanomaterials in the Treatment of Wastewater: A Review

Yaqoob

Parveen

Umar

et al. 2020

Water

522

160

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Water is an essential part of life and its availability is important for all living creatures. On the other side, the world is suffering from a major problem of drinking water. There are several gases, microorganisms and other toxins (chemicals and heavy metals) added into water during rain, flowing water, etc. which is responsible for water pollution. This review article describes various applications of nanomaterial in removing different types of impurities from polluted water. There are various kinds of nanomaterials, which carried huge potential to treat polluted water (containing metal toxin substance, different organic and inorganic impurities) very effectively due to their unique properties like greater surface area, able to work at low concentration, etc. The nanostructured catalytic membranes, nanosorbents and nanophotocatalyst based approaches to remove pollutants from wastewater are eco-friendly and efficient, but they require more energy, more investment in order to purify the wastewater. There are many challenges and issues of wastewater treatment. Some precautions are also required to keep away from ecological and health issues. New modern equipment for wastewater treatment should be flexible, low cost and efficient for the commercialization purpose.

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“…Nanomaterials are the major focus of present material science studies due to their magnificent ability to be custom tailored as per the synthesis conditions with desired morphological and chemical characteristics for the diverse applications [1,2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of methyl acrylamide cellulose nanowhiskers for environmental applications

2020

Lett Appl NanoBioSci

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Cellulose is the most abundant biopolymer on earth with excellent mechanical strength, biocompatibility, and biodegradability. Yet, its poor chemical reactivity deceives its application in various biotechnological sectors. In this study, the microcrystalline cellulose was used as low cost substrate for the synthesis of cellulose nanowhiskers (CNWs) using controlled acid hydrolysis. In order to improve their chemical reactivity, synthesized CNWs were modified with carboxyl functional groups using 2,2,6,6-Tetramethylpiperidinyloxyl (TEMPO) mediated oxidation reaction. These carboxylated cellulose nanowhiskers (CCNWs) were functionalized with amine functional groups using carbodiimide reaction. The as-synthesized amine terminated amido-cellulose nanowhiskers (ACNWs) were modified with methyl acryl functional groups using Michael addition resulting methyl acryl functionalized amido-cellulose nanowhiskers (MAACNWs). The synthesized MAACNWs were characterized using Fourier-transform infrared spectroscopy, UV-visible spectroscopy and nuclear magnetic resonance spectroscopy. The physical morphology was studied using Atomic force microscopy, X-Ray Diffraction and zeta analyser. The modified cellulose nanowhiskers were found to exhibit 4 folds increased surface roughness confirming fabrication of negatively charged chemical groups on CNWs yielding 7 folds higher surface charge than pristine nanowhiskers. Hence, the modified CNWs could be acknowledged as potential candidate for effective heavy metal biosorption and remediation studies.

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Engineered nanomaterials and their surface functionalization for the removal of heavy metals: A review

Cited by 222 publications

References 218 publications

Silica-Coated Magnetic Nanocomposites for Pb2+ Removal from Aqueous Solution

Silica-Coated Magnetic Nanocomposites for Pb2+ Removal from Aqueous Solution

Role of Nanomaterials in the Treatment of Wastewater: A Review

Synthesis and characterization of methyl acrylamide cellulose nanowhiskers for environmental applications

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