Reductive Immobilization of Chromium in Soils Containing Heterogeneous Fe-Bearing Minerals

Doğaroğlu, Zeynep Görkem; Kantar, Çetin

doi:10.1080/15320383.2016.1217827

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…It is found that the initial pH value has a significant impact on the removal rate of Cr(VI) in soil, no matter what kind of nZVI is wrapped by modified materials [74]. More specifically, the pH value and the Cr(VI) removal rate show a negative correlation [75], that is, with the rising pH value, the Cr(VI) removal rate declines [76].…”

Section: Effect Of the Initial Ph Valuementioning

confidence: 99%

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

Chen

et al. 2020

Nanotechnology Reviews

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Chromium (Cr) is a common toxic heavy metal that is widely used in all kinds of industries, causing a series of environmental problems. Nanoscale zero- valent iron (nZVI) is considered to be an ideal remediation material for contaminated soil, especially for heavy metal pollutants. As a material of low toxicity and good activity, nZVI has been widely applied in the in situ remediation of soil hexavalent chromium (Cr(vi)) with mobility and toxicity in recent years. In this paper, some current technologies for the preparation of nZVI are summarized and the remediation mechanism of Cr(vi)-contaminated soil is proposed. Five classified modified nZVI materials are introduced and their remediation processes in Cr(vi)-contaminated soil are summarized. Key factors affecting the remediation of Cr(vi)-contaminated soil by nZVI are studied. Interaction mechanisms between nZVI-based materials and Cr(vi) are explored. This study provides a comprehensive review of the nZVI materials for the remediation of Cr(vi)-contaminated soil, which is conducive to reducing soil pollution.

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Section: Effect Of the Initial Ph Valuementioning

confidence: 99%

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

Chen

et al. 2020

Nanotechnology Reviews

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“…In the environment, chromium exists commonly in trivalent (Cr(III)) and hexavalent (Cr(VI)) form 9 . Meanwhile, Cr(VI) is highly toxic, soluble, mobile and carcinogenic to humans and animals 10 , Cr(III) is considered an essential component of human and animal nutrition in trace amounts 11 . Due to Cr(VI) carcinogenicity and mutagenicity, the Environment Protection Agency (EPA) has designated chromium as a class A or priority pollutant 12 .…”

Section: Introductionmentioning

confidence: 99%

“…Exposure to Cr(VI) has been linked to various types of cancer, epigastric pain, nausea, vomiting, severe diarrhea and hemorrhage at concentration less than 0.10 mg/g of body mass 14 . Therefore, owing to this characteristic toxicity and solubility, Cr(VI) reduction to Cr(III) has been useful as a remediation technology for Cr(VI)-contaminated environment 10,15 . Chemical reduction signi cantly reduce Cr (VI) to Cr (III) 16 , but requires high reagents concentration and introduced secondary contamination 17 .…”

Section: Introductionmentioning

confidence: 99%

Microparticles Immobilized Tamarindus Indica Extract Bioremediates Toxic Chromium in Tannery Effluent and Contaminated Soil

Katsayal

Muhammad

Ahmed

et al. 2021

Preprint

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Bioreduction of certain environmental toxic metals using plant-derived antioxidants has been proven effective and promising bioremediation approach. The Redox state of specific metals, in particular chromium, determines its environmental solubility and toxicity. Antioxidant-rich extract of tamarind leaves was extracted and its Cr(VI) reduction potentials in tannery effluent and Cr(VI) contaminated soil determined under acidic and neutral pHs. Microparticles immobilized tamarind extract were produced and similarly tested for Cr(VI) reduction capacity in tannery effluent and contaminated soil. The particles were initially characterized to evaluate their physicochemical properties, encapsulation efficiency as well as release kinetics. The particles produced were irregular in shape with a very high extract adsorption efficiency (87.06%). The particles shows high release kinetic constant and a lower half-life. About, 50 and 60% Cr(VI) reduction was achieved by tamarind extract immobilized microparticles in tannery effluent and 60 and 80% in Cr(VI) contaminated soil after 4hrs at pH 6.7 and 2.0, respectively. Cr(VI) in tannery effluent and contaminated soils was efficiently reduced and immobilization enhanced and preserved the extract effectiveness for a longer period of time. Therefore, immobilization of antioxidant-rich extract into microparticles was found to be essential in attaining maximum Cr(VI) reduction. Therefore, findings from this work could be very helpful in industrial waste treatment and environmental cleanliness.

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Behaviors of Structural Fe(II) of Nontronite and Aqueous Fe(II) on Cr(VI) Removal in the Presence of Citrate

2019

Water Air Soil Pollut

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Reductive Immobilization of Chromium in Soils Containing Heterogeneous Fe-Bearing Minerals

Cited by 7 publications

References 26 publications

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

Microparticles Immobilized Tamarindus Indica Extract Bioremediates Toxic Chromium in Tannery Effluent and Contaminated Soil

Behaviors of Structural Fe(II) of Nontronite and Aqueous Fe(II) on Cr(VI) Removal in the Presence of Citrate

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