학술논문
Characteristics and mechanism of Pb(II) adsorption/desorption on GO/ r-GO under sulfide-reducing conditions
Document Type
Article
Source
Journal of Industrial and Engineering Chemistry, 73(0), pp.233-240 May, 2019
Subject
Language
English
ISSN
1876-794X
1226-086X
1226-086X
Abstract
Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavymetal ions and, therefore, generates concern over the release of adsorbed contaminants when GOadsorbent is discharged into a reducing environment. This study reveals that the maximum adsorptioncapacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g 1 respectively. GO was reduced to r-GO bysulfide, causing 2.59–6.46% of the adsorbed Pb(II) to be released and was stably dispersed as a Pb(II)-oxidative debris (OD) complex. Our results provide valuable information about heavy metaltransportation in environments containing GO under different redox conditions.