Biotechnology and nanotechnology for remediation of chlorinated volatile organic compounds: current perspectives

Ebrahimbabaie, Parisa; Pichtel, John

doi:10.1007/s11356-020-11598-y

Cited by 39 publications

(20 citation statements)

References 304 publications

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“…The extensive use of chlorinated hydrocarbons (especially chlorinated alkanes and alkenes; CAEs) as solvents, degreasers, dry-cleaning agents, and fumigants has resulted in localized contamination of soils and aquifers, particularly in regard to carbon tetrachloride (CT; CCl4), chloroform (CF; CHCl3), methylene chloride (DCM; CH2Cl2), 1,1,1-trichloroethane (C2H3Cl3), 1,2dichloroethane (C2H4Cl2), perchloroethene (PCE; C2Cl4), and trichloroethene (TCE; C2HCl3) [51][52][53]. Given the human health and ecotoxicity issues associated with CAEs, there has been a concerted effort to develop approaches for the remediation of CAE contaminated environments, often by means of reductive dechlorination to lesser-or non-chlorinated products [54,55]. Reductive dechlorination of CAEs by green rust is highly variable, with some, such as CT and hexachloroethane (C2Cl6) undergoing rapid reduction, and others such as chloromethane (CH3Cl) and chloroethane (C2H5Cl) being completely unreactive [28,47,48,[56][57][58][59][60][61][62][63][64].…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Amendments on the Reductive Dechlorination of Carbon Tetrachloride by Green Rust

O’Loughlin

Boyanov

Kemner

et al. 2022

Preprint

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The reductive dechlorination of carbon tetrachloride (CT) was examined in aqueous suspensions of sulfate green rust (GRSO4) amended with either Co(II), Cr(VI), Hg(II), Mn(II), Mo(VI), Ni(II), Pb(II), V(III), or Zn(II). The rate of CT reduction in the Hg(II)-amended GRSO4 suspension was ~1000 times faster than in unamended GRSO4. CT reduction was moderately enhanced in the Cr(III) , Mn(II)-, Mo(VI)-, Pb(II)-, and V(III)-amended systems. No increase in the rate of CT reduction was observed in the Co(II)-, Ni(II)-, or Zn(II)-amended systems. Chloroform (CF) was the major product of CT reduction, with minor amounts of methane and traces of ethene, and ethane; dichloromethane and chloromethane were not observed. A reaction pathway scheme is proposed in which CT is reduced primarily to chloroform (CF) and minor non-chlorinated end products, largely through a series of one-electron reductions forming radicals and carbenes/carbenoids.

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Section: Introductionmentioning

confidence: 99%

Effects of Metal Amendments on the Reductive Dechlorination of Carbon Tetrachloride by Green Rust

O’Loughlin

Boyanov

Kemner

et al. 2022

Preprint

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“…Thus, many studies have focused on the kinetics and mechanisms that may be involved in the atmospheric removal processes of these compounds, and so their reactions with OH radicals, as well as the ones with O(

P), have been investigated (see, for example [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ] and references therein). However, it should be noted that some halogenated ethenes are considered to be potential threats to human health (see, for example [ 8 , 9 , 10 ] and references therein), so the assessing of their presence in real-time is clearly desirable, both for experimentally studying their atmospheric chemistry as well as for quantifying their concentrations. The recent advances in high-resolution infrared techniques make them very efficient in monitoring and detecting gaseous pollutants in real-time and with a very high sensitivity [ 11 , 12 , 13 ], provided that accurate spectroscopic data are available [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

The Spectroscopic Characterization of Halogenated Pollutants through the Interplay between Theory and Experiment: Application to R1122

et al. 2022

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In the last decade, halogenated ethenes have seen an increasing interest for different applications; in particular, in refrigeration, air-conditioning and heat pumping. At the same time, their adverse effects as atmospheric pollutants require environmental monitoring, especially by remote sensing spectroscopic techniques. For this purpose, an accurate characterization of the spectroscopic fingerprint—in particular, those of relevance for rotational–vibrational spectroscopy—of the target molecules is strongly needed. This work provides an integrated computational–theoretical investigation on R1122 (2-Chloro-1,1-difluoro-ethylene, ClHC=CF2), a compound widely employed as a key intermediate in different chemical processes. State-of-the-art quantum chemical calculations relying on CCSD(T)-based composite schemes and hybrid CCSD(T)/DFT approaches are used to obtain an accurate prediction of the structural, rotational and vibrational spectroscopic properties. In addition, the equilibrium geometry is obtained by exploiting the semi-experimental method. The theoretical predictions are used to guide the analysis of the experimentally recorded gas-phase infrared spectrum, which is assigned in the 400–6500 cm−1 region. Furthermore, absorption cross sections are accurately determined over the same spectral range. Finally, by using the obtained spectroscopic data, a first estimate of the global warming potential of R1122 vibrational spectra is obtained.

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“…Subsequently, to reduce the time needed to achieve remediation goals and overcome bioremediation limitations, a recommended strategy may be the combination of several synergistic technologies [16]. Indeed, the combination of abiotic degradation, e.g., by chemical reduction with zero-valent iron (ZVI), and the stimulation of biological metabolism is a diffused approach [17][18][19][20]. With this purpose, the immobilization of the contaminant by adsorption and the addition of an electron donor gave excellent results in a field-scale application [21].…”

Section: Introductionmentioning

confidence: 99%

Coupled Adsorption and Biodegradation of Trichloroethylene on Biochar from Pine Wood Wastes: A Combined Approach for a Sustainable Bioremediation Strategy

et al. 2022

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Towards chlorinated solvents, the effectiveness of the remediation strategy can be improved by combining a biological approach (e.g., anaerobic reductive dechlorination) with chemical/physical treatments (e.g., adsorption). A coupled adsorption and biodegradation (CAB) process for trichloroethylene (TCE) removal is proposed in a biofilm–biochar reactor (BBR) to assess whether biochar from pine wood (PWB) can support a dechlorinating biofilm by combining the TCE (100 µM) adsorption. The BBR operated for eight months in parallel with a biofilm reactor (BR)—no PWB (biological process alone), and with an abiotic biochar reactor (ABR)—no dechlorinating biofilm (only an adsorption mechanism). Two flow rates were investigated. Compared to the BR, which resulted in a TCE removal of 86.9 ± 11.9% and 78.73 ± 19.79%, the BBR demonstrated that PWB effectively adsorbs TCE and slows down the release of its intermediates. The elimination of TCE was quantitative, with 99.61 ± 0.79% and 99.87 ± 0.51% TCE removal. Interestingly, the biomarker of the reductive dechlorination process, Dehalococcoides mccartyi, was found in the BRR (9.2 × 105 16S rRNA gene copies/g), together with the specific genes tceA, bvcA, and vcrA (8.16 × 106, 1.28 × 105, and 8.01 × 103 gene copies/g, respectively). This study suggests the feasibility of biochar to support the reductive dechlorination of D. mccartyi, opening new frontiers for field-scale applications.

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Biotechnology and nanotechnology for remediation of chlorinated volatile organic compounds: current perspectives

Cited by 39 publications

References 304 publications

Effects of Metal Amendments on the Reductive Dechlorination of Carbon Tetrachloride by Green Rust

Effects of Metal Amendments on the Reductive Dechlorination of Carbon Tetrachloride by Green Rust

The Spectroscopic Characterization of Halogenated Pollutants through the Interplay between Theory and Experiment: Application to R1122

Coupled Adsorption and Biodegradation of Trichloroethylene on Biochar from Pine Wood Wastes: A Combined Approach for a Sustainable Bioremediation Strategy

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