Degradation of PCE, TCE and 1,1,1-TCA by nanosized FePd bimetallic particles under various experimental conditions

Cho, Yunchul; Choi, Sang‐Il

doi:10.1016/j.chemosphere.2010.07.054

Cited by 59 publications

(23 citation statements)

References 24 publications

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“…These reaction conditions also resulted in relatively lower TCE degradations. These results are similar to those of other studies (Cho and Choi 2010;Matheson and Tratnyek 1994), indicating that chemical reduction is the major mechanism of TCE degradation by nZVI.…”

Section: Characteristics Of Tce Degradation By Nzvisupporting

confidence: 82%

“…The removal efficiencies of TCE increased as the dosages of nZVI increased. For the initial TCE concentrations of 500 and 250 mg/L, the TCE degradations were The kinetics of the TCE degradation by nZVI in this study typically followed the pseudo-first-order model (Cho and Choi 2010;Matheson and Tratnyek 1994). Figure 3 shows the correlations between the rate constants (k) of the TCE degradations and the nZVI doses in this study.…”

Section: Characteristics Of Tce Degradation By Nzvimentioning

confidence: 99%

“…(4), and the primary production of ferrous iron from nZVI will undergo further oxidation reaction and be converted to ferric iron, which also produces hydroxyl ions, as shown in Eq. (5) (Cho and Choi 2010;Crane and Scott 2012;Matheson and Tratnyek 1994).…”

Section: Characteristics Of Tce Degradation By Nzvimentioning

confidence: 99%

“…Trichloroethylene (TCE) is discharged in the industrial wastewater produced by metal degreasing processes, electronic processes, and dry cleaning, which are most critical sources for the dense, non-aqueous-phase liquid (DNAPL) contaminants in groundwater that are difficult to remediate (Cho and Choi 2010;Haest et al 2012;Wang et al 2012). Industrial wastewaters that contain TCE typically have been treated by various chemical technologies, including chemical adsorption and oxidation processes (West et al 2008).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Online monitoring of the nanoscale zero-valent iron process for trichloroethylene wastewater treatment

Chi

Cheng

et al. 2014

Int. J. Environ. Sci. Technol.

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In this study, a batch-type, nanoscale, zerovalent iron process was used to treat trichloroethylene wastewater. Variations in oxidation-reduction potential (ORP) and pH in the reactor were monitored online for use in developing the model for process control. After the addition of nanoscale, zero-valent iron, the pH value increased rapidly, from 5.0-6.0 to around 8.5-9.5, whereas the ORP decreased dramatically, from around 300 mV to -700 to -800 mV. The degradation of trichloroethylene reached equilibrium at a reaction time of about 120 min. The use of a dose of 1.5 g/L to treat an influent that had a trichloroethylene concentration of 50 mg/L resulted in a removal efficiency of 94 %. Two models, i.e., a multiple regression model and an artificial neural network (ANN) model, were used to develop the control model to predict the trichloroethylene removal efficiencies. Both the regression model and the ANN model performed precise prediction results for the trichloroethylene removal efficiencies, with correlation coefficients of about 0.87 and 0.98, respectively, resulting in great potential for controlling the trichloroethylene removal.

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Section: Characteristics Of Tce Degradation By Nzvisupporting

confidence: 82%

Section: Characteristics Of Tce Degradation By Nzvimentioning

confidence: 99%

Section: Characteristics Of Tce Degradation By Nzvimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Online monitoring of the nanoscale zero-valent iron process for trichloroethylene wastewater treatment

Chi

Cheng

et al. 2014

Int. J. Environ. Sci. Technol.

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“…Due to low removal efficiency of unmodified ZVINPs, modification of these particles is necessary to increase the efficiency of adsorbent. To improve the removal efficiency of ZVINPs particles some metal elements and/or organic compounds are used (20)(21)(22)(23)(24). Silver is one of the metal elements that can be used to develop the removal characteristics of ZVINPs adsorbent (25,26).…”

Section: Introductionmentioning

confidence: 99%

Temephos Removal From Water Samples by Silver Modified Zero-Valent Iron Nanoparticles

Shiralipour

Zargar

Parham

2015

Jundishapur J Health Sci

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Background:Temephos is an organophosphate pesticide used as larvicide in the environment. Although not extremely hazardous, it can be risky for human health in the moderate concentrations. Objectives: This study investigated the quantitative removal efficiency of temephos, an organophosphate pesticide, from contaminated water by silver-modified ZVINPs. In addition, the operational parameters affected on removal process were optimized. Materials and Methods: In the current study, three water samples from different parts of Iran such as Ahvaz tap water, the Karoon River passing through Khoramshahr city, and the Caspian Sea were collected. A new method for effective removal of temephos from the sample solutions by silver modified zero-valent iron nanoparticles as an efficient adsorbent was introduced. Results: For a typical solution in which temephos was removed about 21% by iron zero-valent nanoparticles, modification by silver improved removal method was up to about 99%. The required time for the complete removal of temephos was about eight minutes. Variation of pH and concentration of KNO 3 as an electrolyte was considerably ineffective on the efficient temephos removal. Adsorption studies of the method were followed by Langmuir isotherm. Maximum temephos adsorption amount was 12.65 mg/g under optimal conditions. The proposed method was simple, fast and safe to treat temephos polluted waters. Preparation of the adsorbent was easy and removal time was short. Conclusions: Briefly, the current study represents a novel method to eliminate temephos as an organophosphate compound from water samples with modified zero-valent iron nanoparticles.

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Nanomaterials for the Removal of Volatile Organic Compounds from Aqueous Solutions

Badawy¹,

Salih²

2014

Nanomaterials for Environmental Protection

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Degradation of PCE, TCE and 1,1,1-TCA by nanosized FePd bimetallic particles under various experimental conditions

Cited by 59 publications

References 24 publications

Online monitoring of the nanoscale zero-valent iron process for trichloroethylene wastewater treatment

Online monitoring of the nanoscale zero-valent iron process for trichloroethylene wastewater treatment

Temephos Removal From Water Samples by Silver Modified Zero-Valent Iron Nanoparticles

Nanomaterials for the Removal of Volatile Organic Compounds from Aqueous Solutions

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