Kinetics of 2-chlorobiphenyl Reductive Dechlorination by Pd-fe⁰ Nanoparticles

¹ School of Biological & Chemical Engineering, Taizhou Vocational & Technical College, Taizhou 318000, China
² College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014, China

^a Corresponding author: dmzhao@zjut.edu.cn

Abstract

Kinetics of 2-chlorobiphenyl (2-Cl BP) catalytic reductive dechlorination by Pd-Fe⁰ nanoparticles were investigated. Experimental results showed that ultrafine bimetallic Pd-Fe⁰e 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-Fe⁰ 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-Fe⁰ nanoparticles prepared in the presence of ultrasound available dosage 7g L^-1, initial pH value in aqueous solution 3.0, and reaction temperature 25°C. 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.