Fabrication and characterization of Fe/Ni nanoparticles supported by polystyrene resin for trichloroethylene degradation

Zhou, Zhenming; Ruan, Wen‐Juan; Huang, Hua-Shan; Shen, Chunhua; Yuan, Baoling; Huang, Ching-Hua

doi:10.1016/j.cej.2015.07.076

Cited by 42 publications

(8 citation statements)

References 52 publications

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Section: Resultsmentioning

confidence: 99%

“…When pH > 7, there was insufficient H + in the system to participate in the dechlorination of CCl4, and the electrons released by ZVI were more easily consumed by dissolved oxygen in the water (O2 + 2H2O + 4e − → 4OH − ) [23). Higher pH with numerous OH − ions accelerated the formation of ferrous and ferric oxides and precipitated onto the Ag/Fe surface and occupied the reaction site; thus decreasing the overall reaction rate [34,35]. XPS analysis of Ag/Fe particles after reaction at different pH values of 6.0, 7.0, and 8.0 (Figure 10) showed that the binding energies of Ag3d5/2 and Ag3d3/2 were ~368.24, ~368.20, ~368.22 eV and ~374.23, ~374.18, ~374.20 eV, respectively, indicating that the existence of Ag on the ZVI surface was Ag 0 after the reaction.…”

Section: Effect Of Ph On Ccl4 Degradationmentioning

confidence: 99%

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Rapid Degradation of Carbon Tetrachloride by Microscale Ag/Fe Bimetallic Particles

Zhu

Zhou

et al. 2021

IJERPH

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Cost-effective zero valent iron (ZVI)-based bimetallic particles are a novel and promising technology for contaminant removal. The objective of this study was to evaluate the effectiveness of CCl4 removal from aqueous solution using microscale Ag/Fe bimetallic particles which were prepared by depositing Ag on millimeter-scale sponge ZVI particles. Kinetics of CCl4 degradation, the effect of Ag loading, the Ag/Fe dosage, initial solution pH, and humic acid on degradation efficiency were investigated. Ag deposited on ZVI promoted the CCl4 degradation efficiency and rate. The CCl4 degradation resulted from the indirect catalytic reduction of absorbed atomic hydrogen and the direct reduction on the ZVI surface. The CCl4 degradation by Ag/Fe particles was divided into slow reaction stage and accelerated reaction stage, and both stages were in accordance with the pseudo-first-order reaction kinetics. The degradation rate of CCl4 in the accelerated reaction stage was 2.29–5.57-fold faster than that in the slow reaction stage. The maximum degradation efficiency was obtained for 0.2 wt.% Ag loading. The degradation efficiency increased with increasing Ag/Fe dosage. The optimal pH for CCl4 degradation by Ag/Fe was about 6. The presence of humic acid had an adverse effect on CCl4 removal.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Ph On Ccl4 Degradationmentioning

confidence: 99%

Rapid Degradation of Carbon Tetrachloride by Microscale Ag/Fe Bimetallic Particles

Zhu

Zhou

et al. 2021

IJERPH

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“…The use of emulsified nZVI with a hydrophobic membrane is also reported and applied in field experiments (Quinn et al 2005;Borden 2007;Berge and Ramsburg 2009). In addition, particles can be supported on a solid (Fang et al 2018b), such as bentonite (Su et al 2011), activated carbon such as Carbo-Iron (Mackenzie et al 2012), zeolite, carbon nanotubes (Xu et al 2013), membranes/resins (Xu and Bhattacharyya 2006;Ni and Yang 2014;Zhou et al 2016), mesoporous silica (Sun et al 2017), cellulose nanocrystal (Bossa et al 2017) or clay (Ezzatahmadi et al 2017;Su et al 2017). The use of activated carbon as support can promote the sorption of hydrophobic pollutants to reduce the aqueous concentration of the pollutant, and the interspecies electron transfer for the remediation process (Liu et al 2012).…”

Section: Nanoscale and Microscale Particlesmentioning

confidence: 99%

In Situ Chemical Reduction of Chlorinated Organic Compounds

Rodrigues

Betelu

Colombano

et al. 2020

Applied Environmental Science and Engineering for a Sustainable Future

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Chlorinated organic compounds (COCs) are common anthropogenic contaminants of soil and groundwater. COCs were industrially produced for different applications, such as dry cleaning, degreasing, or as pesticides. The presence of COCs in the environment is a major concern because of their toxicity and persistence.The most widely used method for their remediation is the conventional pump-and-treat system. However, this technology can hardly achieve a complete remediation because of geological characteristics and the presence of pore space pollution/adsorbed pollution, leading to a residual saturation. Hence, in addition to the improvement of pump-and-treat systems, in situ chemical processes have been largely developed. These chemical processes involve the injection of chemical reagents for the removal of residual source pollution and/or the treatment of plume contamination. Chemical degradation of COCs can be achieved by oxidative or reductive processes. If chemical oxidation has been first developed for in situ application, chemical reduction is one of the most important emerging remediation techniques for COCs treatment. Due to the electronegative character of chlorine substituents, COCs can effectively be transformed via reductive pathways. Moreover, reductive dechlorination has shown higher efficiency on highly chlorinated compounds. This chapter focuses on the presentation of the chemical reduction of the most common COCs pollutants, followed by kinetic and mechanistic approaches related to the use of iron-based particles. Developments on in situ chemical reduction technologies in order to enhance remediation rates are also exposed. Influence of environmental conditions for in situ applications is then developed. Finally, a case study is presented.

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“…CF, chloroform. standard (0.3 and 0.1 mg/L for maximum acceptable level of Fe and Ni, respectively) (Zhou et al, 2016b).…”

Section: Figmentioning

confidence: 99%

Removal of Chloroform by Fe/Ni Nanoparticles Supported on Activated Carbon Fibers

JinXin

ChenHai

YangQi

2019

Environmental Engineering Science

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Application of support materials in nanoparticle technology can effectively preserve the reactivity of nanoparticles through preventing nanoparticle aggregation. In this study, the composite of activated carbon fiber-supported bimetallic Fe/Ni nanoparticles (ACF-Fe/Ni) was synthesized and several characterizations for ACF-Fe/Ni were carried out, including scanning electron microscopy, Brunauer-Emmett-Teller surface area, X-ray diffraction, and X-ray photoelectron spectroscopy. Subsequently, dechlorination performance of ACF-Fe/Ni toward chloroform (CF) was evaluated via a series of batch experiments. Results showed that 92.1% of CF was removal by ACF-Fe/Ni within 45 min, higher than that of raw Fe/Ni (63.3%) and ACFs (13.7%) under the identical condition. Analysis of dechlorination products and chloride ion formed during the dechlorination process indicated that the possible pathway of CF removal by ACF-Fe/Ni included hydrogenolysis and complete dechlorination. Moreover, influence of key parameters manifested that rising ACF-Fe/Ni dosage and ambient temperature and lowering initial pH value were conducive to the removal of CF. Common ions and sulfur compounds both showed a detrimental effect on the removal of CF by ACF-Fe/Ni, specifically sulfides almost completely inhibiting the reactivity of ACF-Fe/Ni.

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Fabrication and characterization of Fe/Ni nanoparticles supported by polystyrene resin for trichloroethylene degradation

Cited by 42 publications

References 52 publications

Rapid Degradation of Carbon Tetrachloride by Microscale Ag/Fe Bimetallic Particles

Rapid Degradation of Carbon Tetrachloride by Microscale Ag/Fe Bimetallic Particles

In Situ Chemical Reduction of Chlorinated Organic Compounds

Removal of Chloroform by Fe/Ni Nanoparticles Supported on Activated Carbon Fibers

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