Influential factors of 2-chlorobiphenyl reductive dechlorination by highly dispersed bimetallic 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

Highly dispersed Pd-Fe⁰ bimetallic nanoparticles were prepared in the presence of 40 kHz ultrasonic irradiation in order to enhance disparity and reactivity, and simultaneously avoid agglomeration. Influential factors of 2-chlorobiphenyl (2-Cl BP) reductive dechlorination by highly dispersed Pd-Fe⁰ nanoparticles were investigated. Experimental results showed that highly dispersed Pd-Fe⁰ nanoparticles prepared in the in the presence of ultrasound could further improve the dechlorination efficiency of 2-Cl BP, meanwhile the biphenyl (BP) formation rates increased obviously and increased from 47.4% (in the absence of ultrasound) to 95.3% (in the presence of ultrasound) within 300 min. The catalytic reductive dechlorination effciency of 2-Cl BP was dependent on Pd-Fe⁰ nanoparticles prepared methods, Pd-Fe⁰ nanoparticles dosage, Pd loading percentage over Fe⁰ and initial pH values