Kinetics of 2-chlorobiphenyl Reductive Dechlorination by Pd-fe⁰Nanoparticles

Abstract

Abstract. Kinetics of 2-chlorobiphenyl (2-Cl BP) catalytic reductive dechlorination by Pd-Fe 0 nanoparticles were investigated. Experimental results showed that ultrafine bimetallic Pd-Fe 0 e nanoparticles were synthesized in the presence of 40 kHz ultrasound in order to enhance disparity and avoid agglomeration. The application of ultrasonic irradiation during the synthesis of Pd-Fe 0 nanoparticles further accelerated the dechlorinated removal ratio of 2-Cl BP. Up to 95.0% of 2-Cl BP was removed after 300 min reaction with the following experimental conditions: initial 2-Cl BP concentration 10 mg L -1 , Pd content 0.8 wt. %, bimetallic Pd-Fe 0 nanoparticles prepared in the presence of ultrasound available dosage 7 g L -1 , initial pH value in aqueous solution 3.0, and reaction temperature 25 . The catalytic reductive dechlorination of 2-Cl BP followed pseudo-first-order kinetics and the apparent pseudo-first-order kinetics constant was 0.0143 min -1 .

Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater

“…For remediation, both nanoparticle aspects (the role of Pd, particle composition and corresponding H 2 production) and various water conditions (pH and temperature) were investigated by using 2-chlorobiphenyl (PCB 1) as a model compound. The PCB 1, one of the toxic PCBs, has recalcitrant nature and it can be directly dechlorinated to biphenyl without any intermediates [55]. The Pd/Fe dechlorination method relies on the activation of H 2 by Pd.…”