Persulfate activation by natural zeolite supported nanoscale zero-valent iron for trichloroethylene degradation in groundwater

Huang, Junyi; Yi, Shuping; Chen, Kewei; Lo, Irene M.C.

doi:10.1016/j.scitotenv.2019.05.331

Cited by 72 publications

(10 citation statements)

References 51 publications

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“…The proposed removal mechanism consisted of two steps: the first step was the physical adsorption of Cr(VI) on the ACF-nZVI surface area or inner layer, where the second step was a reduction of Cr(VI) to Cr(III) by nZVI [116]. In another study, Huang et al [117] studied the activation of persulfate (PS) by using a zeolite-supported nZVI composites (PS-Z/nZVI) system and examined its efficiency for TCE degradation. The results indicated that Z/nZVI showed high ability towards PS activation (1.5 mM), and high removal efficiency (98.8%) of TCE was observed at pH 7 within 2 h. Moreover, the PS-Z/nZVI system showed high efficiency in terms of TCE for a wide range of pH (4-7) [117].…”

Section: Combined Nanoremediation With Other Remediation Technologymentioning

confidence: 99%

“…In another study, Huang et al [117] studied the activation of persulfate (PS) by using a zeolite-supported nZVI composites (PS-Z/nZVI) system and examined its efficiency for TCE degradation. The results indicated that Z/nZVI showed high ability towards PS activation (1.5 mM), and high removal efficiency (98.8%) of TCE was observed at pH 7 within 2 h. Moreover, the PS-Z/nZVI system showed high efficiency in terms of TCE for a wide range of pH (4-7) [117]. Table 3 summarizes the recent works conducted in soil and groundwater remediation by combining nanoremediation technologies with other remediation methods.…”

Section: Combined Nanoremediation With Other Remediation Technologymentioning

confidence: 99%

See 1 more Smart Citation

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: Combined Nanoremediation With Other Remediation Technologymentioning

confidence: 99%

Section: Combined Nanoremediation With Other Remediation Technologymentioning

confidence: 99%

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

Alazaiza

Albahnasawi

Ali

et al. 2021

Water

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“…Trichloroethylene is a dense nonaqueous phase liquid because it is insoluble in water, and its density is larger than that of water. [ 1 ] Trichloroethylene is extensively used in various applications due to its advantages and is usually used as industrial solvents, extractants, fungicides, refrigerants, and dry cleaners. [ 2–4 ] It is the best metal degreaser and is mainly used as a cleaner for metal parts and electronic components in color TV, refrigerator, automobile, air conditioning, precision machinery, microelectronics, and other industries.…”

Section: Introductionmentioning

confidence: 99%

“…[ 5,6 ] As a human carcinogen and a ubiquitous environmental pollutant, trichloroethylene is insoluble in water, persistent in the environment, and poses continuous threats to human health. [ 1,7 ] So we should pay greater attention on the production and use of trichloroethylene, and try to avoid the environmental problem caused by trichloroethylene, and it is also necessary to take effective measures to degrade trichloroethylene before discharge. Therefore, studying its structural and physical properties is valuable for its diversified application and effective degradation.…”

Section: Introductionmentioning

confidence: 99%

Structural and physical properties of trichloroethylene under an external electric field

Tao

Duan

et al. 2021

J of Physical Organic Chem

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Study on a series of physical and chemical changes of molecules under an external electric field (EEF) can deeply understand the properties of molecules. Trichloroethylene is widely used in industrial solvents, extractants, fungicides, refrigerants, dry cleaning, and other fields. In this work, the structural and physical characteristics of trichloroethylene under EEF were investigated on the basis of density functional theory within the B3LYP/def2‐TZVP level. Calculated results show that the bond lengths, bond angles, total energy, dipole moment, charge, and Raman spectra change under EEF. Under the effect of EEF, the Raman spectra show vibrational stark effect, which causes a redshift or blueshift of the wavenumbers. These results help to understand the effect of EEF on structures and physical properties and provide effective guidance for various applications.

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“…Trichloroethylene (TCE) is a high volatile and toxic chemical used as an industrial solvent, household cleaner, and metal degreaser. It has widespread occurrence in groundwaters due to the leakage from underground storage tanks and improper treatment in landfills [30][31][32]. It was reported that firefighter training exercises often released fire-fighting foams which contained PFASs, as well as fuels into the environment [10,33].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidation of Perfluorooctanesulfonate by Magnéli Phase Ti4O7 Electrode in the Presence of Trichloroethylene

Yang¹,

Wang²,

Lu³

et al. 2020

AEER

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This study examined the degradation of perfluorooctanesulfonate (PFOS) in electrochemical oxidation (EO) processes in the presence of trichloroethylene (TCE). The EO experiment was performed in a gas-tight reactor using Magnéli phase titanium suboxide (Ti4O7) as the anode. The experimental data demonstrated that 75% of PFOS (2 μM) was degraded at 10 mA/cm2 current density in 30 min without TCE present in the solution, while the presence of 76 μM TCE apparently inhibited the degradation of PFOS, reducing its removal down to 53%. Defluorination ratio suggested that PFOS was significantly mineralized upon EO treatment, and it appeared to be not influenced by the presence of TCE. The respective pseudo-first order rate constants (kobs) of PFOS removal were 0.0471 and 0.0254 min-1 in the absence and presence of TCE. The degradation rates of both PFOS and TCE increased with current density rising from 2.5 to 20 mA/cm2. In the presence of TCE, chloride, chlorate, and perchlorate were formed that accounted for 79.7 %, 5.53%, and 1.51% of the total chlorine at 60 min. This work illustrates the promise of the Magnéli phase Ti4O7 electrode based electrochemical oxidation technology for degrading per- and polyfluoroalkyl substances (PFASs) and co-contaminants in groundwaters.

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Persulfate activation by natural zeolite supported nanoscale zero-valent iron for trichloroethylene degradation in groundwater

Cited by 72 publications

References 51 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

Structural and physical properties of trichloroethylene under an external electric field

Electrochemical Oxidation of Perfluorooctanesulfonate by Magnéli Phase Ti4O7 Electrode in the Presence of Trichloroethylene

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