Immobilization of nanoscale zerovalent iron in hierarchically channelled polyacrylonitrile for Cr(VI) remediation in wastewater

Sciscenko, Iván; Luca, Vittorio; Ramos, Cinthia Paula; Scott, Thomas Bligh; Montesinos, V. Nahuel; Quici, Natalia

doi:10.1016/j.jwpe.2020.101704

Cited by 13 publications

(13 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[8] Due to their high water mobility, these ions can easily penetrate biological cell walls and lead to risks for human health, including respiratory, hepatic and renal problems as well as skin lesions. [9][10] As nondegradable toxic pollutants, anions containing Cr VI also have awful mutagenicity as well as carcinogenicity. [11] The presence of them in water is caused by multiple sources, including waste water from industries of leather, paint and metallurgical.…”

Section: Introductionmentioning

confidence: 99%

“…Typical examples include anions containing Cr VI , which normally exist in forms of Cr 2 O 7 2− and CrO 4 2− [8] . Due to their high water mobility, these ions can easily penetrate biological cell walls and lead to risks for human health, including respiratory, hepatic and renal problems as well as skin lesions [9–10] . As non‐degradable toxic pollutants, anions containing Cr VI also have awful mutagenicity as well as carcinogenicity [11] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ionic Liquid‐Functionalized CQDs as Effective “Signal‐Off” Fluorescence Nanoprobes for Selective and Sensitive Detection of Iron (III) and Chromium (VI)

et al. 2021

View full text Add to dashboard Cite

Ionic liquid-functionalized carbon quantum dots (ILCQDs) were directly synthesized by one-pot pyrolysis from citric acid and 1aminopropyl-3-methyl imidazole bromide. ILCQDs emitting blue fluorescence and exhibiting photoluminescence quantum yield of 5.69 % were characterized by TEM, SAED, SEM, EDS, XRD, FTIR, XPS, UV-vis, fluorescence, zeta potential, TGA and 1 HNMR. They were nanoparticles with high surface positive charges. Meanwhile, ILCQDs exhibited excitation-dependence, stability and superior water dispersibility. Due to static quenching and internal filtering effects, their fluorescence was effectively quenched by Fe 3 + and Cr VI . Consequently, they were exactly developed as effective "signal-off" fluorescent nanoprobes for selective and sensitive detection of Fe 3 + and Cr VI . ILCQDs-based fluorescent nanoprobes had wider linear ranges and the limits of detection for Fe 3 + cation and Cr VI anion reached as low as 11.38 μM and 4.04 μM, respectively. More importantly, ILCQDs were successfully applied to detection of Cr VI in practical water samples and recoveries were 91.59 %-101.28 %, suggesting ILCQDs had promising application in environmental analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionic Liquid‐Functionalized CQDs as Effective “Signal‐Off” Fluorescence Nanoprobes for Selective and Sensitive Detection of Iron (III) and Chromium (VI)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Its low cost, minor environmental impact and low toxicity had propelled its study towards a wide array of target pollutants. Several works have reported an excellent performance of ZVI in the removal of e.g., heavy metals, nitrates, azo dyes, and halogenated and nitro organic compounds [8][9][10]. On the other hand, the use of iron compounds is also widely spread within the AOPs.…”

Section: Introductionmentioning

confidence: 99%

A Rational Analysis on Key Parameters Ruling Zerovalent Iron-Based Treatment Trains: Towards the Separation of Reductive from Oxidative Phases

et al. 2021

Self Cite

View full text Add to dashboard Cite

The development of treatment trains for pollutant degradation employing zerovalent iron has been attracting a lot of interest in the last few years. This approach consists of pre-treatment only with zerovalent iron, followed by a Fenton oxidation taking advantage of the iron ions released in the first step. In this work, the advantages/disadvantages of this strategy were studied employing commercial zerovalent iron microparticles (mZVI). The effect of the initial amount of mZVI, H2O2, pH, conductivity, anions and dissolved oxygen were analysed using p-nitrobenzoic acid (PNBA) as model pollutant. 83% reduction of PNBA 6 µM into p-aminobenzoic acid (PABA) was achieved in natural water at an initial pH 3.0 and 1.4 g/L of mZVI, under aerobic conditions, in 2 h. An evaluation of the convenience of removing mZVI after the reductive phase before the Fenton oxidation was investigated together with mZVI reusability. The Fenton step against the more reactive PABA required 50 mg/L of H2O2 to achieve more than 96% removal in 15 min at pH 7.5 (final pH from the reductive step). At least one complete reuse cycle (reduction/oxidation) was achieved with the separated mZVI. This approach might be interesting to treat wastewater containing pollutants initially resistant to hydroxyl radicals.

show abstract

“…Iron is also one of the key reagents employed in AOPs such as Fenton processes (described below), where it can be used as salts, oxides or directly as metal. For the latter, zerovalent iron (ZVI) has been also demonstrated its capacity to remove heavy metals [78,79].…”

Section: Processes Involving Iron For Contaminants Abatementmentioning

confidence: 99%

“…Its low cost, environmental impact and toxicity, have propelled its study towards a wide array of target pollutants[97]. Several studies have reported promising results for ZVI in the removal of heavy metals, nitrates, azo dyes, and halogenated and nitro organic compounds[79,98,99]. ZVI in water is corroded into Fe 2+ (mainly at acidic pH), generate H2O2 in presence of dissolved oxygen, or comproportionate with Fe 3+ into Fe 2+ (R 1.35 -R 1.38, respectively)[100].…”

mentioning

confidence: 99%

Emerging Photochemical Processes Involving Iron for Wastewater Treatment

Sciscenko¹

View full text Add to dashboard Cite

Immobilization of nanoscale zerovalent iron in hierarchically channelled polyacrylonitrile for Cr(VI) remediation in wastewater

Cited by 13 publications

References 67 publications

Ionic Liquid‐Functionalized CQDs as Effective “Signal‐Off” Fluorescence Nanoprobes for Selective and Sensitive Detection of Iron (III) and Chromium (VI)

Ionic Liquid‐Functionalized CQDs as Effective “Signal‐Off” Fluorescence Nanoprobes for Selective and Sensitive Detection of Iron (III) and Chromium (VI)

A Rational Analysis on Key Parameters Ruling Zerovalent Iron-Based Treatment Trains: Towards the Separation of Reductive from Oxidative Phases

Emerging Photochemical Processes Involving Iron for Wastewater Treatment

Contact Info

Product

Resources

About