Technological advancement in the remediation of heavy metals employing engineered nanoparticles: A step towards cleaner water process

Yadav, Nikita; Singh, Satyendra Kumar; Saini, Ojasvi; Srivastava, Shaili

doi:10.1016/j.enmm.2022.100757

Cited by 10 publications

(3 citation statements)

References 105 publications

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“…The effects of pH values on the adsorption of Hms and metalloids observed in this study trend agrees with the report published elsewhere [46][47][48][49][50][51], which confirms that increased pH level, triggers an increase in the sorption rate of HM ions through which precipitation occur on the surface of the adsorbent. The results obtained here are comparable to the study published by Yadav et al [52] which stated that the application of nanomaterial for wastewater treatment increases the sorption rate of heavy metals with a significant influence on the temperature. The small particle size effect was noted to improve the reaction between the nano-slag and clay minerals which resulted in favorable uptake of the targeted metalloids.…”

Section: Effect Of Ph On Heavy Metal Adsorptionsupporting

confidence: 91%

Adsorption of Heavy Metals from Contaminated Water using Leachate Modular Tower

Ikechukwu

Adu

2023

Civ Eng J

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The heavy metals (HMs) and metalloids such as Cr(VI), As(Ill), and Pb(II) in contaminated water are toxic even at trace levels and have caused devastating negative health impacts on human beings. Hence, the effective adsorption of these heavy metals from contaminated water is important to protect biodiversity, hydrosphere ecosystems, and human beings. In this study, a leachate modular tower (LMT) was developed for the singular purpose of adsorbing HMs. The LMT contained nano-slag as a liner, which was synthesized from slag. The nano-slag was blended in different proportions of 90:10; 80:20, 70:30, 60:40, and 50:50 to the combined mass of clay and nano-slag, to evaluate the most efficient ratio of the blends capable of adsorbing HMs and metalloids with 100% efficiency. A series of leachate tests were performed to evaluate the adsorption capacity of LMT with different embedded liners. Attenuation periods of 2, 5, 7, and 10 days with a temperature of 500 °C were also selected to improve the sorption rate and uptake of HMs. Subsequently, the effluents were subjected to inductive coupled plasma mass spectrometry (ICP-MS) tests to evaluate the concentrations and percentages of adsorbed HMs, which were calculated using a pseudo-first-order adsorption model. The results revealed that the removal of 98%As, 99%Cd, and 99.9% Pb was achieved with a 50%:50% ratio of soil and nano-slag as the liner at 10 days equilibrium period. Furthermore, 98%Zn, 95.45%Cu, 93.3%Fe, 97%Ni, and 89% Hg were achieved upon further investigation using the same dosage of soil and nano-slag and equilibrium conditions. The scanning electron microscopy (SEM) tests demonstrated that some traces of the absorbed HMs and metalloids were found on the liner surfaces, indicating significant changes in microstructure. The results indicated the sorption rate increased significantly due to the elevated temperature, aluminosilicate structure, and prolonged attenuation period, which are also associated with an elevated pH level and higher cation exchange capacity (CEC), of the liner. Doi: 10.28991/CEJ-2023-09-06-017 Full Text: PDF

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Section: Effect Of Ph On Heavy Metal Adsorptionsupporting

confidence: 91%

Adsorption of Heavy Metals from Contaminated Water using Leachate Modular Tower

Ikechukwu

Adu

2023

Civ Eng J

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“…Compared to other metal oxide NPs, ZnO has received the highest attention from researchers. Among its many attributes are biocompatibility, nontoxic, chemically stable under exposure to both high temperatures and UV light, and the recognition by the US Food and Drug Administration (FDA) as a generally recognized as safe substance (GRAS) [127,128].…”

Section: Zinc Oxide (Zno) Npmentioning

confidence: 99%

A Review on Reinforcements and Additives in Starch-Based Composites for Food Packaging

Muñoz-Gimena,

Oliver-Cuenca,

Peponi

et al. 2023

Polymers

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The research of starch as a matrix material for manufacturing biodegradable films has been gaining popularity in recent years, indicating its potential and possible limitations. To compete with conventional petroleum-based plastics, an enhancement of their low resistance to water and limited mechanical properties is essential. This review aims to discuss the various types of nanofillers and additives that have been used in plasticized starch films including nanoclays (montmorillonite, halloysite, kaolinite, etc.), poly-saccharide nanofillers (cellulose, starch, chitin, and chitosan nanomaterials), metal oxides (titanium dioxide, zinc oxide, zirconium oxide, etc.), and essential oils (carvacrol, eugenol, cinnamic acid). These reinforcements are frequently used to enhance several physical characteristics including mechanical properties, thermal stability, moisture resistance, oxygen barrier capabilities, and biodegradation rate, providing antimicrobial and antioxidant properties. This paper will provide an overview of the development of starch-based nanocomposite films and coatings applied in food packaging systems through the application of reinforcements and additives.

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“…Within the diversity of nanomaterials, metallic nanoparticles (MNPs) have been recurrently studied for a range of applications based on their physicochemical and biological properties, which differ from their analogue in bulk and are strongly influenced by their metallic nature (gold, silver, and copper, among others), due to their size and morphology. Catalytic, sensing, , cancer treatment, antimicrobial, fertilizer, and wastewater remediation applications , have been reported for MNPs. To synthesize MNPs, physical, chemical, or biological methods are used; here, there are two techniques to synthesize nanoparticles: microorganism-mediated synthesis and plant-mediated synthesis .…”

Section: Introductionmentioning

confidence: 99%

Influence of Carboxymethyl Cellulose on the Green Synthesis of Gold Nanoparticles Using Gliricidia sepium and Petiveria alliacea Extracts: Surface-Enhanced Raman Scattering Effect Evaluation

Horta-Piñeres,

Cortez-Valadez,

Avila

et al. 2023

ACS Omega

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Gold nanoparticles (AuNPs) were synthesized and stabilized using ecological strategies: the extracts of the leaves of the plants Gliricidia sepium (GS) and Petiveria alliacea (PA) reduced the metallic Au ions to AuNPs. The AuNPs were analyzed as surface-enhanced Raman scattering (SERS) substrates for pyridoxine detection (vitamin B6). UV–vis spectroscopy was carried out to assess the stability of the AuNPs. As a result, absorption bands around 530 and 540 nm were obtained for AuNPs-PA and AuNPs-GS, respectively. Both cases associated it with localized surface plasmon resonance (LSPR). In the final stage of the synthesis, to stabilize the AuNPs, carboxymethyl cellulose (CMC) was added; however, LSPR bands do not exhibit bathochromic or hypsochromic shifts with the addition of CMC. Transmission electron microscopy (TEM) micrographs show relatively spherical morphologies; the particle diameters were detected around 7.7 and 12.7 nm for AuNPs-PA and AuNPs-GS, respectively. The nanomaterials were evaluated as SERS substrates on pyridoxine, revealing an intensification in the vibrational mode centered at 688 cm –1 associated with the pyridinic ring. Complementarily, different density functional theory functionals were included to obtain molecular descriptors on the Au n -cluster-pyridoxine interaction to study the SERS behavior.

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Technological advancement in the remediation of heavy metals employing engineered nanoparticles: A step towards cleaner water process

Cited by 10 publications

References 105 publications

Adsorption of Heavy Metals from Contaminated Water using Leachate Modular Tower

Adsorption of Heavy Metals from Contaminated Water using Leachate Modular Tower

A Review on Reinforcements and Additives in Starch-Based Composites for Food Packaging

Influence of Carboxymethyl Cellulose on the Green Synthesis of Gold Nanoparticles Using Gliricidia sepium and Petiveria alliacea Extracts: Surface-Enhanced Raman Scattering Effect Evaluation

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