TY - JOUR
T1 - Characteristics and mechanism of Pb(II) adsorption/desorption on GO/r-GO under sulfide-reducing conditions
AU - Zhang, Jianfeng
AU - Xie, Xiaodan
AU - Liang, Cheng
AU - Zhu, Weihuang
AU - Meng, Xiaoguang
N1 - Publisher Copyright:
© 2019 The Korean Society of Industrial and Engineering Chemistry
PY - 2019/5/25
Y1 - 2019/5/25
N2 - Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavy metal ions and, therefore, generates concern over the release of adsorbed contaminants when GO adsorbent is discharged into a reducing environment. This study reveals that the maximum adsorption capacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g −1 respectively. GO was reduced to r-GO by sulfide, 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 metal transportation in environments containing GO under different redox conditions.
AB - Compared with graphene oxide (GO), r-GO (the reduced form) has a lower adsorption capacity for heavy metal ions and, therefore, generates concern over the release of adsorbed contaminants when GO adsorbent is discharged into a reducing environment. This study reveals that the maximum adsorption capacity of Pb(II) on GO and r-GO was 937.65 and 92.99 mg g −1 respectively. GO was reduced to r-GO by sulfide, 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 metal transportation in environments containing GO under different redox conditions.
KW - Adsorption/desorption characteristic
KW - Graphene oxide
KW - Pb(II)
KW - Sulfide-reduced graphene oxide
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U2 - 10.1016/j.jiec.2019.01.029
DO - 10.1016/j.jiec.2019.01.029
M3 - Article
AN - SCOPUS:85061112334
SN - 1226-086X
VL - 73
SP - 233
EP - 240
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
ER -