A green method for removing chromium (VI) from aqueous systems using novel silicon nanoparticles: Adsorption and interaction mechanisms

Mehmood, Sajid; Mahmood, Mohsin; Núñez‐Delgado, Avelino; Alatalo, Juha M.; Elrys, Ahmed S.; Rizwan, Muhammad; Weng, Jiechang; Li, Weidong; Zhang, Huimin

doi:10.1016/j.envres.2022.113614

Cited by 30 publications

(10 citation statements)

References 65 publications

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“…Kinetic adsorption models describe the mechanism of adsorption of heavy metal ions by biosorbents and particularly determine the rate of biosorption during the removal of heavy metals from wastewater on an industrial scale to optimize the design parameters, including the adsorbate residence time and reactor dimension [67]. In experimental works, the kinetic description of adsorption processes and the removal efficiency of heavy metals by various adsorbents have frequently been evaluated by several mathematical models [68][69][70], most of which are empirical equations [71][72][73]. The common kinetics models (pseudo-first order, pseudo-second order, intra-particle diffusion kinetic, and Elovich), which were used to fit experimental data, are expressed in Table 2.…”

Section: Kinetic Modelsmentioning

confidence: 99%

Adsorption of Heavy Metals: Mechanisms, Kinetics, and Applications of Various Adsorbents in Wastewater Remediation—A Review

Raji,

Karim,

Karam

et al. 2023

Waste

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Heavy metal contamination in wastewater is a significant concern for human health and the environment, prompting increased efforts to develop efficient and sustainable removal methods. Despite significant efforts in the last few decades, further research initiatives remain vital to comprehensively address the long-term performance and practical scalability of various adsorption methods and adsorbents for heavy metal remediation. This article aims to provide an overview of the mechanisms, kinetics, and applications of diverse adsorbents in remediating heavy metal-contaminated effluents. Physical and chemical processes, including ion exchange, complexation, electrostatic attraction, and surface precipitation, play essential roles in heavy metal adsorption. The kinetics of adsorption, influenced by factors such as contact time, temperature, and concentration, directly impact the rate and effectiveness of metal removal. This review presents an exhaustive analysis of the various adsorbents, categorized as activated carbon, biological adsorbents, agricultural waste-based materials, and nanomaterials, which possess distinct advantages and disadvantages that are linked to their surface area, porosity, surface chemistry, and metal ion concentration. To overcome challenges posed by heavy metal contamination, additional research is necessary to optimize adsorbent performance, explore novel materials, and devise cost-effective and sustainable solutions. This comprehensive overview of adsorption mechanisms, kinetics, and diverse adsorbents lays the foundation for further research and innovation in designing optimized adsorption systems and discovering new materials for sustainable heavy metal remediation in wastewater.

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Section: Kinetic Modelsmentioning

confidence: 99%

Adsorption of Heavy Metals: Mechanisms, Kinetics, and Applications of Various Adsorbents in Wastewater Remediation—A Review

Raji,

Karim,

Karam

et al. 2023

Waste

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“…In the case of Cr (VI) sorption kinetics on green nanoparticles, it was concluded that chemisorption played a critical role. Studies have suggested that Cr (VI) sorption involves a number of different interactions, such as electrostatic interactions, hydrophobic interactions, an exchange of ligands and ions, and a hydrogen bonding [ 14 , 49 , 50 ]. In addition, Choi et al [ 51 ] found that the pH of the solution affected Cr (VI) adsorption and chemically altered the nanoparticle surface.…”

Section: Resultsmentioning

confidence: 99%

“…Plant-based nanoparticle production is a revolutionary technique with numerous applications in agriculture, food industry, and medicine [ 13 ]. Recently, Mehmood et al [ 14 ] suggest that silicon nanoparticles produced from Equisetum arvense can remove Cr (VI) pollution from affected environments in a green and innovative manner. Conventionally, synthesized NPs have limited clinical applications due to their toxicity [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata

Wenjie

Ahmed

et al. 2022

Bioinorganic Chemistry and Applications

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Aqueous solutions containing toxic elements (TEs) (such as hexavalent chromium (Cr (VI)) can be toxic to humans even at trace levels. Thus, removing TEs from the aqueous environment is essential for the protection of biodiversity, hydrosphere ecosystems, and humans. For plant fabrication of zinc oxide nanoparticles (PF-ZnONPs), Azolla pinnata plants were used, and X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), SEM, and FTIR techniques were used for the identification of PF-ZnONPs and ZnONPs, which were used to remove Cr (VI) from aqueous solution. A number of adsorption parameters were studied, including pH, dose, concentration of metal ions, and contact time. The removal efficiency of PF-ZnONPs for Cr (VI) has been found to be 96% at a time (60 min), 69.02% at pH 4, and 70.43% at a dose (10 mg·L−1). It was found that the pseudo-second-order model best described the adsorption of Cr (VI) onto PF-ZnONPs, indicating a fast initial adsorption via diffusion. The experimental data were also highly consistent with the Langmuir isotherm model calculations.

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“…The method uses every agricultural waste that has a significant content of silica as a precursor to synthesize silica components and uses plant metabolites as a surfactant [ 62 ]. Different kinds of agricultural waste, for instance, horsetail plant [ 63 ], hexafluorosilicic acid (a fertile waste) [ 64 ], banana peel ash [ 65 ], rice husk [ 66 ], palm kernel shells [ 67 ] and bagasse ash [ 68 ], have been used as a silica source for the preparation of MSNPs. In another study, β-glucosidase was immobilized on tannic acid-templated MSNPs to synthesize biocatalysts.…”

Section: Exclusive Terminologies and Synthesis Methods Of Mesoporous ...mentioning

confidence: 99%

Recent Advances in Mesoporous Silica Nanoparticle-Mediated Drug Delivery for Breast Cancer Treatment

et al. 2023

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Breast cancer (BC) currently occupies the second rank in cancer-related global female deaths. Although consistent awareness and improved diagnosis have reduced mortality in recent years, late diagnosis and resistant response still limit the therapeutic efficacy of chemotherapeutic drugs (CDs), leading to relapse with consequent invasion and metastasis. Treatment with CDs is indeed well-versed but it is badly curtailed with accompanying side effects and inadequacies of site-specific drug delivery. As a result, drug carriers ensuring stealth delivery and sustained drug release with improved pharmacokinetics and biodistribution are urgently needed. Core–shell mesoporous silica nanoparticles (MSNPs) have recently been a cornerstone in this context, attributed to their high surface area, low density, robust functionalization, high drug loading capacity, size–shape-controlled functioning, and homogeneous shell architecture, enabling stealth drug delivery. Recent interest in using MSNPs as drug delivery vehicles has been due to their functionalization and size–shape-driven versatilities. With such insights, this article focuses on the preparation methods and drug delivery mechanisms of MSNPs, before discussing their emerging utility in BC treatment. The information compiled herein could consolidate the database for using inorganic nanoparticles (NPs) as BC drug delivery vehicles in terms of design, application and resolving post-therapy complications.

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A green method for removing chromium (VI) from aqueous systems using novel silicon nanoparticles: Adsorption and interaction mechanisms

Cited by 30 publications

References 65 publications

Adsorption of Heavy Metals: Mechanisms, Kinetics, and Applications of Various Adsorbents in Wastewater Remediation—A Review

Adsorption of Heavy Metals: Mechanisms, Kinetics, and Applications of Various Adsorbents in Wastewater Remediation—A Review

The Adsorption Potential of Cr from Water by ZnO Nanoparticles Synthesized by Azolla pinnata

Recent Advances in Mesoporous Silica Nanoparticle-Mediated Drug Delivery for Breast Cancer Treatment

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