Treatment of Wastewater. Removal of Heavy Metals by Nanofiltration. Case Study: Use of TFC Membranes to Separate Cr (VI) in Industrial Pilot Plant

Otero, José; Mazarrasa, Olav; Otero-Fernández, A.; Fernández, M.D.; Hernández, Antonio; Maroto-Valiente, A.

doi:10.1016/j.proeng.2012.09.029

Cited by 8 publications

(2 citation statements)

References 6 publications

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“…It has been shown that commercial TFC membranes and conventional membranes incorporated with some nanomaterials can improve the removal efficiency of these processes. Commercial polyamide TFC nanofiltration membranes have achieved high metal removal from synthetic wastewater at levels of >95% [77,78]. The authors have shown that the metal retention percentage is mainly pH-dependent, since the charge property of the membrane surface material changes with the pH.…”

Section: Heavy Metals Removalmentioning

confidence: 99%

Removal of Contaminants from Water by Membrane Filtration: A Review

et al. 2022

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Drinking water sources are increasingly subject to various types of contamination due to anthropogenic factors and require proper treatment to remove disease-causing agents. Public drinking water systems use different treatment methods to provide safe and quality drinking water to populations. However, they are ineffective in removing contaminants that are considered a danger to the environment and therefore to humans. Several alternative treatment processes have been proposed, such as membrane filtration, as final purification methods. This paper aims to summarize the type of pollutant compounds, filtration processes, and membranes that have been most studied in this area with particular emphasis on how the modification of membranes, either the manufacturing process or the incorporation of nanomaterials, influences their performance.

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Section: Heavy Metals Removalmentioning

confidence: 99%

Removal of Contaminants from Water by Membrane Filtration: A Review

et al. 2022

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“…Nano-sized magnetic polymer adsorbent combined with tetraethylene-pentamine (TEPA-NMP) was developed for batch adsorption of Cr(VI) [24]. While Fe/Cu bimetallic adsorbent introduced as a novel industrial wastewater pre-management [25] and co-precipitation techniques [26] used for the elimination of Ni(II), Cr(VI), Cd(II), Mn(II), Pb(II), and Zn(II) with the aid of Cu(II) cyclohexyl methyl dithiocarbamate [27,28]. Natural polymers are preferred in modifying the nanoparticles surface to avoid cytotoxicity.…”

Section: Introductionmentioning

confidence: 99%

Recycling of Steel Industry Waste Acid in the Preparation of Fe3O4 Nanocomposite for Heavy Metals Remediation from Wastewater

Emara¹,

Amin²,

Youssef³

et al. 2021

Rev. Chim.

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This study was steered to convert waste acid ensued from the pickling process in steel industries to an esteemed nanocomposite for the elimination of heavy metals (HMs) from wastewater. Magnetic nanoparticles (Fe3O4) preparation from waste was performed by the co-precipitation method. These magnetic nanoparticles are modified by carboxymethyl-a-cyclodextrin polymer (CM-a-CD) through copolymerization reactions. The data obtained from FTIR, XRD, and TEM point up that CM-a-CD is entrenched onto Fe3O4 nanoparticles. The generated CM-a-CD / Fe3O4 was employed for HMs deportation from contaminated water and the adsorption results revealed that CM-a-CD/ Fe3O4 sorption efficiency was in the order of Pb(II) ] Cd(II) ] Cr(VI). The highest adsorption capacity was 64.2 (mg/g) for Pb(II). The kinetic study revealed that the HMs sorption by CM-a-CD/ Fe3O4 follows the pseudo-second-order model. The equilibrium modeling study proved that the Langmuir isotherm model was more fitting. The coexisting ions do not significantly alter the percentage removal of the measured metal ions. The efficiency of the synthesized polymer is particularly high in the tested field samples. Thus, CM-a-CD/ Fe3O4 has an extremely high adsorption capability in the field application as well as excellent reusability results, which will reduce the cost for the CM-a-CD / Fe3O4 as an adsorbent for wastewater treatment.

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