Catalytic dechlorination of polychlorinated biphenyls in soil by palladium–iron bimetallic catalyst

In this research, nickel/iron (Ni/Fe) bimetallic nanoparticles were used for the dechlorination of para-nitrochlorobenzene (p-NCB) which could be identified in contaminated soil and wastewater. In the reaction, Ni acted as a collector of hydrogen and the Fe was corroded for producing hydrogen gas. p-NCB was rapidly adsorbed onto the surface of the nanoparticles. Then, p-NCB was degraded to p-CAN and reduced to aniline, or dechlorinated directly to aniline. It was indicated that Ni loading ratio, Ni/Fe mass ratio, and reaction temperature could greatly affect the dechlorination process of p-NCB. Under similar conditions, when 6 g/L of nanoscale Ni/Fe was used, the dechlorination efficiencies reached 25.9 and 100% under 0.5 and 2.0% of Ni/Fe mass ratios, respectively. Thus, a negative linear correlation between the reaction rate and the initial concentration of p-NCB (within a range of 20 to 80 mg/l) could be observed. The reaction activation energy of 94.6 kJ/mol was obtained within the temperature range of 15 to 35 °C.

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Catalytic Dechlorination of Polychlorinated Biphenyls

Environmental Science & Technology ◽

10.1021/es00003a036 ◽

1995 ◽

Vol 29 (3) ◽

pp. 836-840 ◽

Cited By ~ 48

Author(s):

Yumin. Liu ◽

Jeffrey. Schwartz ◽

Cullen L. Cavallaro

Keyword(s):

Polychlorinated Biphenyls ◽

Catalytic Dechlorination

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Catalytic Dechlorination of Polychlorinated Biphenyls on Activated Carbon

Current Catalysis ◽

10.2174/2211545511201010014 ◽

2012 ◽

Vol 1 (1) ◽

pp. 14-18

Author(s):

Abdul Ghaffar ◽

Masaaki Tabata ◽

Farhana Mazher ◽

Azhar Mashiatullah

Keyword(s):

Activated Carbon ◽

Polychlorinated Biphenyls ◽

Catalytic Dechlorination

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Catalytic dechlorination of polychlorinated biphenyls (PCBs) using amine functionalised titanocenes

Green Chemistry ◽

10.1039/b906311k ◽

2009 ◽

Vol 11 (9) ◽

pp. 1343 ◽

Cited By ~ 4

Author(s):

Andrew E.D. Fletcher ◽

Jonathan D. Hyatt ◽

Kang Min Ok ◽

Dermot O'Hare

Keyword(s):

Polychlorinated Biphenyls ◽

Catalytic Dechlorination

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Structure and composition of metal particles in Pt-Sn/Al2O3 bimetallic catalysts

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100174527 ◽

1990 ◽

Vol 48 (4) ◽

pp. 278-279

Author(s):

A. Sachdev ◽

J. Schwank

Keyword(s):

Bimetallic Catalysts ◽

Bimetallic Catalyst ◽

Size Structure ◽

High Surface ◽

High Surface Area ◽

Metal Particles ◽

Alloy Formation ◽

Particle Size Range ◽

Oxide Supports ◽

Petroleum Fractions

Platinum - tin bimetallic catalysts have been primarily utilized in the chemical industry in the catalytic reforming of petroleum fractions. In this process the naphtha feedstock is converted to hydrocarbons with higher octane numbers and high anti-knock qualities. Most of these catalysts contain small metal particles or crystallites supported on high surface area insulating oxide supports. The determination of the structure and composition of these particles is crucial to the understanding of the catalytic behavior. In a bimetallic catalyst it is important to know how the two metals are distributed within the particle size range and in what way the addition of a second metal affects the size, structure and composition of the metal particles. An added complication in the Pt-Sn system is the possibility of alloy formation between the two elements for all atomic ratios.

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