Removal of Nitroaromatics from Synthetic Wastewater Using Two‐Step Zero‐Valent Iron Reduction and Peroxidase‐Catalyzed Oxidative Polymerization

Mantha, Ramkrishna; Biswas, Nihar; Taylor, Keith E.; Bewtra, Jatinder K.

doi:10.2175/106143002x140017

Cited by 29 publications

(27 citation statements)

References 21 publications

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“…Zero-valent iron reduction of nitroaromatics coupled with peroxidase-catalyzed capture of the resulting anilines as a two-step strategy for removing nitroaromatics from wastewater and process water has been investigated by R. Mantha et al [28]. The concentration range of nitroaromatics studied was adjusted to that which would be present in industrial wastewater streams.…”

Section: Oxidasesmentioning

confidence: 99%

Enzymatic Catalysis of Hydrocarbons Oxidation “in vitro” (Review)

Zeynalov¹,

Nagiev²

2015

ChChT

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Abstract.Reactions proceeding at ambient temperature very promptly and selectively, as it occurs in live organisms, imitation of the wildlife processes, and, eventually, study of mechanism of enzymes action are important challenges of contemporary chemistry. This short review gives information on recent achievements in the field of enzymatic catalysis of oxidation of hydrocarbons. The literature material was gathered using the Thomson Reuters electronic database (Web of Science) and mostly covers the last decades.

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Section: Oxidasesmentioning

confidence: 99%

Enzymatic Catalysis of Hydrocarbons Oxidation “in vitro” (Review)

Zeynalov¹,

Nagiev²

2015

ChChT

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“…A secondary remediation step is necessary to degrade the aromatic amines produced by the reduction reaction to non-toxic compounds. Mantha, et al, (2002) attempted to introduce a second treatment step using a peroxidase enzyme to polymerize the product aromatic amines. The study found that the polymerized products were insoluble and would fall out of solution easily.…”

Section: Chapter II Literature Reviewmentioning

confidence: 99%

“…Research has also shown that aromatic amines can be easily mineralized using AOPs (Casero et al, 1997). Studies have also been conducted that attempt to mineralize NACs using two-step reduction/oxidation processes using Fenton's Reagent (Oh et al, 2003) and enzyme oxidation (Mantha et al, 2002). The hypothesis for this research is that integration of reductive/oxidative processes could prove effective in the mineralization of NACs.…”

Section: Chapter III Research Hypothesis and Study Objectivesmentioning

confidence: 99%

“…Despite the effectiveness of ZVM to reduce DNT to DAT with the assistance of chloride corrosion promoters, DAT is still a hazardous compound that must be removed from water (Agrawal and Tratnyek, 1996;Mantha et al, 2002). An integrated reduction/oxidation process was examined with the objective of converting DNT to CO 2 , water, and inorganic compounds.…”

Section: Chapter VIII Single-step Reduction/oxidation Studymentioning

confidence: 99%

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Single-step treatment of 2,4-dinitrotoluene via zero-valent metal reduction and chemical oxidation

Thomas

Hernández

Kuo

2008

Journal of Hazardous Materials

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Many nitroaromatic compounds (NACs) are considered toxic and potential carcinogens. The purpose of this study was to develop an integrated reductive/oxidative process for treating NAC contaminated waters. The process consists of the combination of zero-valent manganese or iron and a hydroxyl radical based treatment technique.Corrosion promoters were added to the contaminated water to minimize passivation of the metallic species. Water contaminated with 2,4-dinitrotoluen (DNT) was treated with the integrated process using a recirculating batch reactor. It was demonstrated that addition of corrosion promoters to the contaminated water enhanced the rate of reaction of 2,4-DNT with zero-valent iron or manganese. Results showed that iron provided greater reduction of 2,4-DNT than manganese. Chemical oxidation was used to mineralize the reduction products. The degree of mineralization was measured analyzing the samples for total organic carbon and nitrates. A proposed reaction and corrosion mechanisms and rate expressions were developed during the course of the study.ii DEDICATION This thesis is dedicated to the memory of my late grandmother, Emily Thomas.Her amazing will and determination was seconded only by the love she had for her family. You are missed Nanny, I love you. I would like to thank my colleagues,

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“…4 The dechlorination of these compounds by iron has been widely studied [5][6][7][8][9][10][11] and continues to expand as more pollutants are tested against it. Iron has also been shown to reduce nitrates, 12 bromates, 12 chlorates, 12 nitroaromatic compounds, [13][14] and brominated 15 or carbarylated 16 pesticides. It has been shown effective at removing arsenic, 17 lead, 18 uranium, 19 and hexavalent chromium 18,20 from water, as well as promoting the biodegradation of azo dyes.…”

Section: Introductionmentioning

confidence: 99%

Iron Nanoparticles in Reactive Environmental Barriers

Nuxoll¹,

Shimotori²,

Arnold³

et al. 2003

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Abstract:Zero-valent iron is cheap, environmentally innocuous, and effective at reducing chlorinated organics. It has, as a result, become a popular candidate for remediating aquifers contaminated with trichloroethylene and other halogenated pollutants. In this paper, we discuss one such system, where iron nanoparticles are synthesized and incorporated into polyvinyl alcohol membranes, forming water-permeable barriers to these pollutants. These barriers are tested against a variety of contaminants, including carbon tetrachloride, copper, and chromate.The success (and, in some cases, failure) of these membranes offer several insights regarding the design and application of reactive barrier films for environmental remediation. These iron membranes are especially effective at blocking copper, potentially opening a new avenue of metal / radionuclide remediation applications. They might also, by prudent choice of polymer, be made into preventative barriers which would line potential pollution sites such as landfills or tank farms.The economic advantages of using larger iron particles are clear, but the drawbacks due to reduced effectiveness are not so straightforward and may, in fact, change with the application. We build upon our existing theory to predict how the particle size (and hence, the effective reaction rate of the system) should affect contaminant diffusion through the membranes.

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Removal of Nitroaromatics from Synthetic Wastewater Using Two‐Step Zero‐Valent Iron Reduction and Peroxidase‐Catalyzed Oxidative Polymerization

Cited by 29 publications

References 21 publications

Enzymatic Catalysis of Hydrocarbons Oxidation “in vitro” (Review)

Enzymatic Catalysis of Hydrocarbons Oxidation “in vitro” (Review)

Single-step treatment of 2,4-dinitrotoluene via zero-valent metal reduction and chemical oxidation

Iron Nanoparticles in Reactive Environmental Barriers

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