Incorporation of zero valent iron nanoparticles in the matrix of cationic resin beads for the remediation of Cr(VI) contaminated waters

Toli, Aikaterini; Chalastara, Konstantina; Mystrioti, Christiana; Xenidis, Anthimos; Papassiopi, Nymphodora

doi:10.1016/j.envpol.2016.04.034

Cited by 49 publications

(14 citation statements)

References 32 publications

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“…These requirements could be successfully fulfilled by organic/inorganic composites [18,19,[31][32][33][34][35][36][37][38][39][40][41]. Thus, magnetic composite sorbents, which allow their easy magnetic separation from the aqueous environment, have been recently reported [31,33,34]. Graphene oxide (GO) and reduced GO represent other attractive inorganic constituents of the composite sorbents used in the removal of Cr(VI) [19,35,38].…”

Section: Introductionmentioning

confidence: 99%

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Drăgan¹,

Humelnicu

2020

Molecules

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Removal of Cr(VI) from the environment represents a stringent issue because of its tremendous effects on living organisms. In this context, design of sorbents with high sorption capacity for Cr(VI) is getting a strong need. For this purpose, poly(vinylbenzyl chloride), impregnated into porous silica (PSi), was cross-linked with either N,N,N’,N’-tetramethyl-1,2-ethylenediamine (TEMED) or N,N,N’,N’-tetramethyl-1,3-propanediamine, followed by the reaction of the free -CH2Cl groups with N,N-diethyl-2-hydroxyethylamine to generate strong base anion exchangers (ANEX) inside the pores. The PSi/ANEX composite sorbents were deeply characterized by FTIR spectroscopy, SEM-energy dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), and water uptake. The sorption performances of composites against Cr(VI) were investigated as a function of pH, contact time, initial concentration of Cr(VI), and temperature. It was found that the cross-linker structure and the silica morphology are the key factors controlling the sorption capacity. The adsorption process was spontaneous and endothermic and well described by pseudo-second-order kinetic and Sips isotherm models. The maximum sorption capacity of 311.2 mg Cr(VI)/g sorbent was found for the composite prepared with mesoporous silica using TEMED as cross-linker. The PSi/ANEX composite sorbents represent an excellent alternative for the removal of Cr(VI) oxyanions, being endowed with fast kinetics, equilibrium in about 60 min, and a high level of reusability in successive sorption/desorption cycles.

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Section: Introductionmentioning

confidence: 99%

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Drăgan¹,

Humelnicu

2020

Molecules

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“…With the applied synthesis procedure, the total amount of incorporated iron per gram of R-nFe was equal to 0.49 ± 0.01 mmol/g. Previous studies had indicated that the embedded Fe was amorphous [49,67]. To be specific, the X-ray patterns of similar R-nFe products did not contain either the characteristic peaks of elemental iron, Fe 0 , or any detectable peaks of Fe +3 or Fe +2 oxides.…”

Section: R-nfe Synthesismentioning

confidence: 83%

Assessing the Performance of Environmentally Friendly-Produced Zerovalent Iron Nanoparticles to Remove Pharmaceuticals from Water

et al. 2021

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Nano zerovalent iron (nZVI), produced from green tea extracts, was incorporated in a cation exchange resin (R-nFe) to investigate its performance regarding the removal of four non-steroidal anti-inflammatory drugs (NSAIDs): ibuprofen (IBU), naproxen (NPX), ketoprofen (KTP) and diclofenac (DCF). The effect of contact time, NaCl pretreatment, pH, R-nFe dose, the role of the supporting material, the initial concentration of pollutants, and the combined effect of nZVI with oxidative reagents was assessed through a series of batch experiments. According to the results, the best removal efficiencies obtained for DCF and KTP were 86% and 73%, respectively, at 48 h of contact time with NaCl pretreated R-nFe at a dose of 15 g L−1 and a pH of 4. The maximum removal efficiency for NPX was 90% for a contact time of 60 min with PS 1 mM and a pH of 3, which was quite similar to the experiment with a greater contact time of 48 h without PS addition. The maximum IBU removal was 70%; this was reached at pH 3, with a contact time of 30 min and R-nFe 15 g L−1. To the authors’ best knowledge, this is the first study investigating the utilization of nZVI, produced from leaf extracts and incorporated into a cationic exchange resin, to remove NSAIDs from water.

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“…Due to the limitation of water and arable land resources, an urgent need is requested to increase effective use of these resources as well as minimize the agro-ecology damage by using the effective modern technologies like nanotechnology (Manjunatha et al 2016). Several applications of nanotechnologies can be addressed in the developing countries including production, conversion and storage energy (like CNT storage of H; Zhang et al 2014(a or b); Li and Sun 2016;Liu et al 2017), enhancement of the agricultural productivity (like herbicide delivery; Pandey et al 2016;Chhipa and Joshi 2016), water treatment and remediation (like nano-membranes; Toli et al 2016;Polloni-Silva et al 2017), diagnosis and screening of diseases Mignani et al 2017), delivery systems of drugs (like nanocapsules; Nawaz and Wong 2017;, processing, coating, packaging and storage of foods (Carbone et al 2016;Sarkar et al 2016;Chalco-Sandoval et al 2017), remediation of air pollution (like nano-catalysts; Kuppusamy et al 2016), durability of construction (Balapour et al 2017;Fallah and Nematzadeh 2017), monitoring Env. Biodiv.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles: a Novel Approach for Sustainable Agro-productivity

Omara

Elsakhawy

Alshaal

et al. 2019

EBSS

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T HE GLOBAL agricultural production suffers from many problems and challenges including climate change, natural resources depletion, environmental pollution, soil degradation, etc. Hence, the global security of this vital sector definitely will be threaten including water security, soil security, energy security, food security, etc. Day by day, several attempts already have been conducted in seeking of the humanity for suitable and sustainable solutions to overcome these previous problems. Nanotechnology was and still one of the most important solutions, which will help us to overcome these problems. So, several nanomaterials have been successfully used in many agro-production fields including nanofertilizers, nanopesticides, nanoremediation, nanobiosensors as well as using of nanoparticles in agri-food production. These nanomaterials can help the agro-production to exploit the natural resources in more sustainable manner and to minimize the agro-wastes. Therefore, regulations for more safety in nanomaterials utilization for agro-production should be starting from the handling for seed germination till the handling for postharvest of agricultural products. Several investigations have been proved the importance of nanomaterials in global securities, the agro-production through the nano-agro-chemicals, management of the agro-wastes, etc. Therefore, this review will highlight new insights and novel approaches for using nanomaterials for sustainable agro-productivity. It will also include the impact of nanomaterials on the agro-environement and the enhanced productivity in frame of sustainability.

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Incorporation of zero valent iron nanoparticles in the matrix of cationic resin beads for the remediation of Cr(VI) contaminated waters

Cited by 49 publications

References 32 publications

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Assessing the Performance of Environmentally Friendly-Produced Zerovalent Iron Nanoparticles to Remove Pharmaceuticals from Water

Nanoparticles: a Novel Approach for Sustainable Agro-productivity

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