Multi wall carbon nanotubes application for treatment of Cr(VI)-contaminated groundwater; Modeling of batch &amp; column experiments

Mpouras, Thanasis; Polydera, Angeliki C.; Dermatas, Dimitris; Verdone, Nicola

doi:10.1016/j.chemosphere.2020.128749

Cited by 71 publications

(14 citation statements)

References 40 publications

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“…Many recent studies investigated the performance of CNTs for contaminated groundwater remediation. Mpouras et al [22] investigated Cr(VI) removal from groundwater by MWCNTs. In addition, the effect of operating conditions such as MWCNTs and Cr(VI) concentration, pH, and contact time were examined [22].…”

Section: Carbon Nanotubesmentioning

confidence: 99%

“…Mpouras et al [22] investigated Cr(VI) removal from groundwater by MWCNTs. In addition, the effect of operating conditions such as MWCNTs and Cr(VI) concentration, pH, and contact time were examined [22]. The results showed that pH has a significant effect on the adsorption efficiency of MWCNTs; for pH higher than 7, the adsorption process remarkably increased.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

“…The adsorption process increased by increasing the MWCNTs concentration. At pH 8, the adsorption percentage increased from 85% to 100% as the concentration of MWCNTs increased from 10 to 50 g L −1 [22]. In another study, Lico et al [87] examined the performance of MWCNTS for the removal of unleaded gasoline from water [87].…”

Section: Carbon Nanotubesmentioning

confidence: 99%

“…Several studies have revealed the potential use of nanoremediation for soil and groundwater [19][20][21][22]. However, the environmental effects of those NPs are still unclear and need more investigation to understand the environmental fate and toxicity of NPs, as these issues are crucial for environmental protection practice.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Recent Advances of Nanoremediation Technologies for Soil and Groundwater Remediation: A Review

Alazaiza

Albahnasawi

Ali

et al. 2021

Water

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Nanotechnology has been widely used in many fields including in soil and groundwater remediation. Nanoremediation has emerged as an effective, rapid, and efficient technology for soil and groundwater contaminated with petroleum pollutants and heavy metals. This review provides an overview of the application of nanomaterials for environmental cleanup, such as soil and groundwater remediation. Four types of nanomaterials, namely nanoscale zero-valent iron (nZVI), carbon nanotubes (CNTs), and metallic and magnetic nanoparticles (MNPs), are presented and discussed. In addition, the potential environmental risks of the nanomaterial application in soil remediation are highlighted. Moreover, this review provides insight into the combination of nanoremediation with other remediation technologies. The study demonstrates that nZVI had been widely studied for high-efficiency environmental remediation due to its high reactivity and excellent contaminant immobilization capability. CNTs have received more attention for remediation of organic and inorganic contaminants because of their unique adsorption characteristics. Environmental remediations using metal and MNPs are also favorable due to their facile magnetic separation and unique metal-ion adsorption. The modified nZVI showed less toxicity towards soil bacteria than bare nZVI; thus, modifying or coating nZVI could reduce its ecotoxicity. The combination of nanoremediation with other remediation technology is shown to be a valuable soil remediation technique as the synergetic effects may increase the sustainability of the applied process towards green technology for soil remediation.

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Section: Carbon Nanotubesmentioning

confidence: 99%

Section: Carbon Nanotubesmentioning

confidence: 99%

Section: Carbon Nanotubesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent Advances of Nanoremediation Technologies for Soil and Groundwater Remediation: A Review

Alazaiza

Albahnasawi

Ali

et al. 2021

Water

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show abstract

“…Amongst the two, the former one is highly toxic because of its higher solubility 4 penetrable capability through biological membranes, highly mobile and have carcinogenic, mutagenic property 5 and also intramolecular nucleic acid interaction, whereas, the latter one is less toxic, act as an important element in trace amount 5 and important in metabolism of carbohydrate and lipids 6 . Having mutagenic and carcinogenic effects on humans such as internal hemorrhage, nausea, dermatitis, asthma, liver and kidney damage 7 based on this, the powerful pollutant has been recognized as type I carcinogen and been further assigned the limit of total chromium presence in drinking water to less than 0.1 mg L −1 by the International Agency for Research on Cancer (IARC) and the United States Environmental Protection Agency (USEPA) respectively 8 . Cr(VI) reduction through conventional methods like chemical reduction, reverse osmosis, ion exchange, precipitation, adsorption and coagulation have major drawbacks including generation of secondary pollutants and high operating cost 9 – 11 .…”

Section: Introductionmentioning

confidence: 99%

Modeling cometabolism of hexavalent chromium by iron reducing bacteria in tertiary substrate system

Upadhyay

Sinha

2021

Sci Rep

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In this study, a bacterial strain Serratia sp. was employed for the reduction of synthetically prepared different concentration of Cr(VI) solution (10, 25, 40, 50 and 100 mg/L). Cometabolism study have been carried out in the binary substrate system as well as in the tertiary substrate system. The results revealed that when glucose was added as a co-substrate, at low Cr(VI) concentration, complete reduction was achieved followed by increased biomass growth, but when Cr(VI) concentration was increased to 100 mg/L, the reduction decline to 93%. But in presence of high carbon iron filings (HCIF) as co-substrate even at higher Cr(VI) concentration i.e. 100 mg/L, 100% reduction was achieved and the cell growth continued till 124 h. The study was illustrated via Monod growth kinetic model for tertiary substrate system and the kinetic parameters revealed that the HCIF and glucose combination showed least inhibition to hexavalent chromium reduction by Serratia sp.

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Kinetic modeling and isotherm approach for biosorptive removal of hexavalent chromium using heat inactivated fungal biomass

Das¹,

Behera

Mohapatra

et al. 2023

Int J of Chemical Kinetics

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Two highly Cr (VI) resistant fungal strains, CSF‐1 and CSF‐2, were isolated and identified as Cladosporium sp. and Penicillium sp., respectively, using 18S rRNA gene sequencing. At optimized growth conditions, the dead biomass of Cladosporium sp. and Penicillium sp. has removed more than 99% of the supplemented Cr(VI). The kinetic study outcomes evidenced that the present fungal Cr(VI) biosorption is best fitting with the pseudo‐first‐order model with higher R2 values (i.e., 0.70–0.95) than that of the pseudo‐second‐order kinetic model (R2 = 0.02–0.73). After analyzing the R2 values, it was observed that the Langmuir and Freundlich isotherm models best fit the Cr(VI) biosorption employing fungal biomass.

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Multi wall carbon nanotubes application for treatment of Cr(VI)-contaminated groundwater; Modeling of batch & column experiments

Cited by 71 publications

References 40 publications

Recent Advances of Nanoremediation Technologies for Soil and Groundwater Remediation: A Review

Recent Advances of Nanoremediation Technologies for Soil and Groundwater Remediation: A Review

Modeling cometabolism of hexavalent chromium by iron reducing bacteria in tertiary substrate system

Kinetic modeling and isotherm approach for biosorptive removal of hexavalent chromium using heat inactivated fungal biomass

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