Carboxymethyl cellulose coating decreases toxicity and oxidizing capacity of nanoscale zerovalent iron

Zhou, Lei; Thanh, Thao Le; Gong, Jianyu; Kim, Jaehwan; Kim, Eunju; Chang, Yoon Seok

doi:10.1016/j.chemosphere.2013.10.085

Cited by 92 publications

(29 citation statements)

References 32 publications

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“…The XPS C 1s spectra of ENZVI and PNZVI (Fig. 7c) show two peaks at 285.2 and 286.7 eV, corresponding to C C and C O species, respectively, verifying the presence of HEC and HPMC on dispersant modified NZVI [46].…”

Section: Xps Characterizationmentioning

confidence: 85%

“…Besides, other studies for increase of NZVI dispersity and mobility in water body or soil have been focused on coating iron nanoparticles with stabilizer via steric hindrance and electrostatic repulsion. These modifiers include various polymer electrolytes and surfactants, such as chitosan [36,37], xanthan gum [38], cetyltrimethyl ammonium bromide (CTAB) [9], and carboxy methylated cellulose (CMC) [39,40], etc.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization, and reactivity of cellulose modified nano zero-valent iron for dye discoloration

Wang

et al. 2015

Applied Surface Science

103

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Section: Xps Characterizationmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and reactivity of cellulose modified nano zero-valent iron for dye discoloration

Wang

et al. 2015

Applied Surface Science

103

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“…Similar results were observed with Agrobacterium sp. (Zhou et al, 2014). At low concentrations (≤100 mg/l), magnetite was even found to promote denitrification by Paracoccus sp.…”

Section: - Nzvi Cytotoxicitymentioning

confidence: 99%

“…cell surface but without causing any damages to the membrane. A potential explanation for the observed reduced toxicity despite the physical contact between CMC-coated nanoparticles and bacterial cells, is that CMC might act as a hydroxyl radical scavenger, protecting the cell from oxidative stress (Zhou et al, 2014). Certain nZVI dispersants such as polyacrylic acid however, appeared to have a slight adverse effect on a TCE-degrading microbial community (Chang et al, 2014).…”

Section: - Nzvi Cytotoxicitymentioning

confidence: 99%

A review of the environmental implications of in situ remediation by nanoscale zero valent iron (nZVI): Behavior, transport and impacts on microbial communities

Lefèvre

Bossa

Wiesner

et al. 2016

Science of The Total Environment

334

103

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The increasing use of strategies incorporating nanoscale zero valent iron (nZVI) for soil and groundwater in situ remediation is raising some concerns regarding the potential adverse effects nZVI could have on indigenous microbial communities and ecosystem functioning. This review provides an overview of the current literature pertaining to the impacts of nZVI applications on microbial communities. Toxicity studies suggest that cell membrane disruption and oxidative stress through the generation of Fe2+ and reactive oxygen species by nZVI are the main mechanisms contributing to nZVI cytotoxicity. In addition, nZVI has been shown to substantially alter the taxonomic and functional composition of indigenous communities. However, because the physico-chemical conditions encountered in situ highly modulate nZVI toxicity, a better understanding of the environmental factors affecting nZVI toxicity and transport in the environment is of primary importance in evaluating the ecological consequences that could result from a more extensive use of nZVI.

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“…PH-08, owing to reduced oxidative stress and less disruption of cell membrane integrity [99]. TEM images of the microstructure change of bacterial cells that were exposed to bare or CMC-stabilized ZVI indicated that bare ZVI-treated cells partially lost the outer boundary, indicating drastic membrane decomposition and severe damage; however, the membrane damage by CMC-stabilized ZVI was to a much less extent.…”

Section: Toxicity Of Stabilized Nanoparticlesmentioning

confidence: 99%

Application of Stabilized Nanoparticles for In Situ Remediation of Metal-Contaminated Soil and Groundwater: a Critical Review

et al. 2015

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Remediation of soil and groundwater contaminated with toxic metals has been a major environmental challenge for decades. Yet, cost-effective and sustainable in situ remediation technologies remain lacking. Over the last 15 years or so, an innovative in situ remediation strategy has shown promising by means of stabilized nanoparticles. Stabilized nanoparticles are prepared using novel stabilizers that facilitate the deliverability and transport of nanoparticles in the subsurface. This study reviews synthesis and characterization of some model stabilized nanoparticles and their application for remediation of metal-contaminated soil and water. Fate and transport of these stabilized nanoparticles in groundwater and soil are also examined. Lastly, this review identifies the key knowledge gaps such as lack of field data pertaining to the long-term effectiveness of the immobilized metals and impacts of the delivered nanoparticles on the biogeochemical conditions in the subsurface. The information may facilitate further development of this promising remediation technology.

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Carboxymethyl cellulose coating decreases toxicity and oxidizing capacity of nanoscale zerovalent iron

Cited by 92 publications

References 32 publications

Synthesis, characterization, and reactivity of cellulose modified nano zero-valent iron for dye discoloration

Synthesis, characterization, and reactivity of cellulose modified nano zero-valent iron for dye discoloration

A review of the environmental implications of in situ remediation by nanoscale zero valent iron (nZVI): Behavior, transport and impacts on microbial communities

Application of Stabilized Nanoparticles for In Situ Remediation of Metal-Contaminated Soil and Groundwater: a Critical Review

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