Dechlorination comparison of mono-substituted PCBs with Mg/Pd in different solvent systems

DeVor, Robert; Carvalho-Knighton, Kathy; Aitken, Brian S.; Maloney, P. R.; Holland, Erin; Talalaj, Lukasz; Fidler, Rebecca; Elsheimer, Seth; Clausen, Christian A.; Geiger, Cherie L.

doi:10.1016/j.chemosphere.2008.07.006

Cited by 32 publications

(21 citation statements)

References 14 publications

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“…It has been reported that the main advantage of systems that use Mg 0 and Mg/Cu particles is the ability to conduct reactions under atmospheric oxygen conditions [1,19,20,28]. To confirm this concept, the reaction was conducted under aerobic conditions without any control of DO using varying doses of 1% Mg/Cu particles and 100 mg/L NO 3 - (Fig.…”

Section: Effect Of Mg/cu Dosage On Nitrate Reductionmentioning

confidence: 96%

“…After discarding the clear aqueous phase, the resulting Mg/Cu particles were rinsed with purified water and acetone until no chloride or copper ions were detected in filtrate. The Experimental investigation of the chemical reduction of nitrate ion 315 prepared bimetal was then completely dried in a drying oven (60-65°C) for 6-7 h, after which it was cooled to room temperature and stored in vials [19,22]. The bimetal Mg/Cu was found to be green-grey color with no visual oxide formation on the surface.…”

Section: Preparation Of Mg/cu Bimetallic Particlesmentioning

confidence: 99%

“…In several studies, magnesium in a bimetallic form has been used for the dechlorination of chlorinated hydrocarbons [19,20] and nitrate reduction [21]. These studies have revealed that magnesium in a bimetallic form has enhanced reactivity toward chlorinated organic compounds and nitrate when compared to zero-valent magnesium.…”

Section: Introductionmentioning

confidence: 98%

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Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles

Ramavandi

Mortazavi

Moussavi

et al. 2011

Reac Kinet Mech Cat

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Bimetallic particles have recently been used as a new means of contaminant reduction from water. Comparing with Fe 0 and Mg 0 alone, synthesized magnesium/copper (Mg/Cu) bimetallic particles have been determined to be potential and efficient agents for nitrate reduction from aqueous solutions. This study suggests that the reductive denitrification of nitrate by Mg/Cu bimetallic particles was dependent on a number of parameters including reductant dose, solution temperature, initial nitrate concentration and contact time. The 1% Mg/Cu (Cu loading of 1 wt.%) bimetallic particles removed the majority of the various nitrate concentrations tested (50, 100, 150, 200 and 300 mg/L) within a short period. The time required for the removal of 90.6% of the NO 3 -from a 100-mg/L solution was about 20 min using 2 g/L bimetallic Mg/Cu at an initial solution pH of 6. The activation energy (E a ) for the nitrate reduction by 1% Mg/Cu over the temperature range of 5-60°C was 12.77 kJ/mol. The experimental results of the kinetic analysis from batch studies indicated that a higher initial nitrate concentration yielded a greater reaction rate constant and the denitrification rate increased with increasing 1% Mg/Cu dosage. The effects of mixing rate on the denitrification rate suggested that the reaction rate increases linearly at mixing rate \100 rpm and remained almost constant at rates over that.

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Section: Effect Of Mg/cu Dosage On Nitrate Reductionmentioning

confidence: 96%

Section: Preparation Of Mg/cu Bimetallic Particlesmentioning

confidence: 99%

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Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles

Ramavandi

Mortazavi

Moussavi

et al. 2011

Reac Kinet Mech Cat

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“…Residual rate constants were estimated by linear regression from the transformed first-order rate equation (Equation (4)). The half-life of degradation (DT 50 ) was calculated from Equation (5). [30,32] All experimental data were compared by analysis of variances (ANOVA) and processed using the statistical software SPSS 11.5 of treatments and control samples.…”

Section: Discussionmentioning

confidence: 99%

“…PCBs are widely used in electric insulating oils, lubricants and coolants in electrical devices because of their high boiling points, high stability, low flammability, antifungal ability and low electrical conductivity. [5] Unfortunately, they will enter the food chains through sediment-dwelling microorganisms. [6] Although the use and production of PCBs have been forbidden since 1970s, their pollution is still a serious issue.…”

Section: Introductionmentioning

confidence: 99%

Dechlorination of 3,3′,4,4′-tetrachlorobiphenyl in aqueous solution by hybrid Fe⁰/Fe₃O₄nanoparticle system

Yin

2014

Journal of Experimental Nanoscience

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Degradation of Triacetone Triperoxide (TATP) Using Mechanically Alloyed Mg/Pd

Albo

Legron

Gittings

et al. 2010

Propellants Explo Pyrotec

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A heterogenous catalytic system consisting of mechanically alloyed Mg/Pd particles has been used to degrade the peroxide explosive, triacetone triperoxide (TATP). The degradation of the TATP with the Mg/Pd particles (half life of 1.2 Â 10 1 min) was compared to the degradation with microscale Mg particles (half life of 1.7 Â 10 3 min) and 10% Pd on activated carbon (half life of 8.7 Â 10 2 min). Combining the Mg and Pd on carbon (Pd/C) through a mechanical alloying process is shown to produce reactive particles that can be used to degrade TATP. The major product of the degradation of TATP with mechanically alloyed Mg/Pd particles was acetone. A material balance for carbon was also calculated for the degradation reaction with 94 AE 5% (mean AE standard deviation) of the TATP carbons accounted for in the production of acetone.

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Dechlorination comparison of mono-substituted PCBs with Mg/Pd in different solvent systems

Cited by 32 publications

References 14 publications

Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles

Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles

Dechlorination of 3,3′,4,4′-tetrachlorobiphenyl in aqueous solution by hybrid Fe⁰/Fe₃O₄nanoparticle system

Degradation of Triacetone Triperoxide (TATP) Using Mechanically Alloyed Mg/Pd

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Dechlorination comparison of mono-substituted PCBs with Mg/Pd in different solvent systems

Cited by 32 publications

References 14 publications

Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles

Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles

Dechlorination of 3,3′,4,4′-tetrachlorobiphenyl in aqueous solution by hybrid Fe0/Fe3O4nanoparticle system

Degradation of Triacetone Triperoxide (TATP) Using Mechanically Alloyed Mg/Pd

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Product

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Dechlorination of 3,3′,4,4′-tetrachlorobiphenyl in aqueous solution by hybrid Fe⁰/Fe₃O₄nanoparticle system