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

摘要

Highly dispersed Pd-Fe° 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-C1 BP) reductive dechlorination by highly dispersed Pd-Fe° nanoparticles were investigated. Experimental results showed that highly dispersed Pd-Fe° nanoparticles prepared in the in the presence of ultrasound could further improve the dechlorination efficiency of 2-C1 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-C1 BP was dependent on Pd-Fe° nanoparticles prepared methods, Pd-Fe° nanoparticles dosage, Pd loading percentage over Fe° and initial pH values