New nano-biocatalyst for 4-chlorophenols removal from wastewater. (2020)

• Record Type: Journal Article
• Authors: Sarno, Maria; Iuliano, Mariagrazia
• Is Part Of: Materials today. Volume 20:Part 1(2020)
• Page Start: 74
• Page End: 81
• Publication Date: 2020
• Subjects: 4-Chlorophenol removal -- Immobilized HRP -- Enzymatic degradation -- Graphene supported nanoparticles -- Reusability; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2019.09.016
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: In this paper, we report an eco-friendly approach for the removal of 4-chlorophenols from wastewater, through the use of horseradish peroxidase (HRP) immobilized on GO_Fe3 O4 /Au@CA nanoparticles. The effects of coupling time and enzyme concentration on the immobilization efficiency were investigated. The effects of reaction time and the reusability on the removal of 4-chlorophenols were also evaluated. In the first 30 min, the degradation process promoted by immobilized HRP was fast and increases up to 67%. The degradation of 4-CP in the presence of immobilized HRP was as high as 98% after 180 min. It is worth noticing that, after 180 min the TOC% removal was 85%. The immobilized HRP retains 95% of the initial activity for the first three cycles. These very high performances were promoted by gold, which contributes significantly to the excellent catalytic activity of our nano-catalyst.