Catalytic dechlorination of 2,4-dichlorophenol by Pd/Fe bimetallic nanoparticles in the presence of humic acid

2010 ◽  
Vol 182 (1-3) ◽  
pp. 252-258 ◽  
Author(s):  
Zhen Zhang ◽  
Qiaohui Shen ◽  
Naman Cissoko ◽  
Jingjing Wo ◽  
Xinhua Xu
Keyword(s):  
Humic Acid ◽  
Bimetallic Nanoparticles ◽  
Catalytic Dechlorination

Kinetics of 2,4-dichlorophenol dechlorination by Pd-Fe bimetallic nanoparticles in the presence of humic acid

2008 ◽  
Vol 9 (1) ◽  
pp. 118-124 ◽  
Author(s):  
Zhen Zhang ◽  
Jing-jing Wo ◽  
Naman Cissoko ◽  
Xin-hua Xu
Keyword(s):  
Humic Acid ◽  
Bimetallic Nanoparticles ◽  
Kinetics Of

Catalytic Dechlorination of Monochloroacetic Acid by Film–Supported Pd/Fe Bimetallic Nanoparticles

2013 ◽  
Vol 664 ◽  
pp. 557-561 ◽  
Author(s):  
Zhi Xia ◽  
Hui Ling Liu ◽  
Shan Wang ◽  
Zhao Hong Meng
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Bimetallic Nanoparticles ◽  
Monochloroacetic Acid ◽  
X Ray ◽  
Catalytic Dechlorination ◽  
Contact Angle Analysis ◽  
Scanning Electron ◽  
Supported Pd

Three novel kinds of support film, including PVDF-PAA film, PVDF·TiO2–PAA film and PVDF–g–AA film, were synthesized and used to immobilize the Pd/Fe bimetallic nanoparticles (NPs). The immobilized Pd/Fe bimetallic NPs systems were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, contact angle analysis, and X-ray photoelectron spectroscopy. The dechlorination efficiency of the immobilized bimetallic NPs systems were tested and discussed by dechlorinating monochloroacetic acid (MCAA). Comparing with free suspended Pd/Fe NPs, bimetallic NPs with support films appeared better catalytic dechlorination efficiency, and the dechlorination efficiencies of 10 mg/L MCAA in 120 min by Pd/Fe NPs immobilized in PVDF–PAA film, PVDF·TiO2–PAA film and PVDF–g–AA film were 56.33%, 71.01% and 75.51%, respectively.

scholarly journals Enhanced Catalytic Dechlorination of 1,2-Dichlorobenzene Using Ni/Pd Bimetallic Nanoparticles Prepared by a Pulsed Laser Ablation in Liquid

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 390 ◽  
Author(s):  
Hyeon Jung ◽  
Seung Lee ◽  
Ravindranadh Koutavarapu ◽  
Sung Kim ◽  
Hyun Choi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Bimetallic Nanoparticles ◽  
Catalytic Properties ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Synthesis Methods ◽  
Laser Ablation In Liquid ◽  
Ni Powder ◽  
Catalytic Dechlorination ◽  
Plausible Mechanism

Bimetallic nanoparticles (NPs) exhibit advantageous electrical, optical, and catalytic properties. Among the various NP synthesis methods, pulsed laser ablation in liquid (PLAL) is currently attracting much attention because of its simplicity and versatility. In this study, a pulsed laser was used to produce nickel/palladium (Ni/Pd) bimetallic NPs in methanol and deionized water. The morphological and optical properties of the resulting Ni/Pd bimetallic NPs were characterized. The synthesized Ni/Pd bimetallic NPs were used for the dechlorination of 1,2-dichlorobenzene (1,2-DCB) under various conditions. The dechlorination rates of 1,2-DCB while using single (Ni and Pd) and bimetallic (Ni powder/Pd and Ni/Pd) NPs were investigated. The results showed that the Ni/Pd bimetallic NPs with 19.16 wt.% Pd exhibited much enhanced degradation efficiency for 1,2-DCB (100% degradation after 30 min). Accordingly, the results of enhanced the degradation of 1,2-DCB provide plausible mechanism insights into the catalytic reaction.

Catalytic Dechlorination of Para-Nitrochlorobenzne in Wastewater through a Nanoscale Nickel-Iron Bimetallic Catalyst

2012 ◽  
Vol 535-537 ◽  
pp. 2257-2263 ◽  
Author(s):  
Shao Feng Niu ◽  
Chun Hui Li ◽  
Yan Peng Cai
Keyword(s):  
Reaction Rate ◽  
Bimetallic Nanoparticles ◽  
Bimetallic Catalyst ◽  
Hydrogen Gas ◽  
Mass Ratio ◽  
Nickel Iron ◽  
Negative Linear Correlation ◽  
Catalytic Dechlorination ◽  
Loading Ratio ◽  
Reaction Activation Energy

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.

Catalytic dechlorination of Aroclor 1242 by Ni/Fe bimetallic nanoparticles

2012 ◽  
Vol 385 (1) ◽  
pp. 160-165 ◽  
Author(s):  
Zhen Zhang ◽  
Sai Hu ◽  
Shams Ali Baig ◽  
Jie Tang ◽  
Xinhua Xu
Keyword(s):  
Bimetallic Nanoparticles ◽  
Catalytic Dechlorination ◽  
Aroclor 1242

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

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