Adsorption of chromium(VI) from saline wastewater using spent tea-supported magnetite nanoparticle

Babaei, Ali Akbar; Ahmadi, Mehdi; Goudarzi, Gholamreza; Jaafarzadeh, Neemat; Baboli, Zeynab

doi:10.1080/19443994.2015.1052990

Cited by 14 publications

(8 citation statements)

References 45 publications

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“…Numerous studies have been published on chromium sorption in aqueous phase using various materials and in particular synthetic nanomaterials [9,[35][36][37][38][39]. To select the articles For each selected article, it was extracted the information related to the parameters considered relevant in sorption [7][8][9]: name and nature of the sorbent, mass of the sorbent with respect to the water volume, type of water used in the experiment, type of experiment (single or other contaminants besides chromium), pH, temperature, contact time between the sorbent and the solution, initial concentration of chromium, chromium species initially present in solution, and removal efficiency.…”

Section: Materials and Methodologymentioning

confidence: 99%

“…Among the various materials used for chromium removal, nanoparticles have been the most common, either using just the core nanoparticles [9,[40][41][42][43][44][45][46], nanoparticles with functionalization [35,[47][48][49], or modified nanoparticles incorporated on substrates [36,50]. Other type of materials have been used, such as nanocomposites [37,51,52], nanofibers [38] and carbon nanotubes [39].…”

Section: Type Of Materialsmentioning

confidence: 99%

“…12 studies suggesting physical interaction between Cr(VI) and sorbents, not all authors agree on the nature of the interaction during the sorption process. The presence of chemical bonds is suggested as a secondary mechanism [69], although Babaei et al [36] suggest that sorption is governed by chemical forces rather than physical electrostatic interactions.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

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Chromium removal from contaminated waters using nanomaterials – A review

Almeida

Cardoso

Tavares

et al. 2019

TrAC Trends in Analytical Chemistry

115

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Current environmental policies aim to reduce the levels of toxic substances in aquatic ecosystems and to promote the water reuse after appropriate treatment of wastewater.Chromium is a hazard element present in effluents of various industries that should be reduced to achieve the objectives of those policies. Most of the results reported in the literature concern the use of nanomaterials for chromium sorption dissolved either in synthetic or mono-elemental spiked solutions. The present work reviews the results of research undertaken in the last decade on the application of various nanomaterials to decrease chromium concentrations in contaminated waters. Major factors influencing the removal efficiency were examined. Because most of the published studies are based on simple experiments with deionised water and mono contamination further studies are suggested focused on effects of natural and artificial chelators, interferences of other trace elements competing with chromium sorption, reduction the sorbent mass per water volume.

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Section: Materials and Methodologymentioning

confidence: 99%

Section: Type Of Materialsmentioning

confidence: 99%

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

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Chromium removal from contaminated waters using nanomaterials – A review

Almeida

Cardoso

Tavares

et al. 2019

TrAC Trends in Analytical Chemistry

115

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“…Langmuir and Liu isotherm models Pseudo-second-order kinetic pH 2.0 30 mg/g [20] Starch-coated magnetic nanoparticles (Starch@MNPs)…”

Section: Adsorption Kineticsmentioning

confidence: 99%

AN EXPERIMENTAL STUDY ON THE EFFICIENCY OF CHROMIUM (VI) REMOVAL WITH STARCH-MAGNETITE NANOCOMPOSITE (Starch@MNPs)

Uysal

Şimşek

Çiftci

2020

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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Nowadays, magnetic nanoadsorbents are used commonly in the removal of heavy metal ions from wastewater. In this study, we prepared starch-coated magnetic nanoparticles (Starch@MNPs) by the co-precipitation method, and used to remove Cr(VI) ions from water. Several batch experiments were performed to determine optimum conditions in the adsorption studies for Starch@MNPs such as pH, contact time, temperature, chromium ion and adsorbent concentrations. The synthesized Starch@MNPs were analyzed by Scanning Electron Microscopy (SEM) to illustrate the shape and surface properties of the nanoparticles. In order to define characterization of the adsorbent, Fourier-transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-Ray Analysis (EDX) techniques were also used. The experimental data were compared with isotherm and kinetic models in order to determine the most suitable for fitting. The results showed that Cr (VI) adsorption of Starch@MNPs was more suitable for Temkin isotherm and Psedudo-second kinetic model, respectively. The maximum adsorption efficiency (98%) of Cr (VI) in 10 mg/L initial concentration was obtained at contact time of 60 min., pH 4.0 and adsorbent concentration of 2.0 g/L. The obtained data from the study showed that Starch@MNPs have quite high separation efficiency for Cr(VI) ions and also showed that this adsorbent can be used as a promising adsorbent in future adsorption studies.

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“…Therefore, numerous novel adsorbents for Cr(VI) removal, including modied biomass, graphene oxide, MOFs and nanoparticles, have been reported in recent years. [6][7][8][9][10] Although some of them have extremely high adsorption capacity, the complex preparation process and high cost of raw materials restrict their large-scale application to a certain extent.…”

Section: Introductionmentioning

confidence: 99%