TY - JOUR
T1 - Novel co-doped iron oxide and graphitic carbon nanosheets on biochar for arsenite removal from contaminated water
T2 - Synthesis, applicability and mechanism
AU - Van Thinh, Nguyen
AU - Yusuke, Shiratori
AU - Tu, Phuc Hoan
AU - Kuwahara, Yoshihiro
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/2
Y1 - 2022/2
N2 - Arsenite (AsIII) is the most toxic form of arsenic in drinking water, but AsIII removal is still a challenge. In this study, α-Fe2O3-doped graphitic carbon nanosheets were coated on the surfaces of coconut biochar backbone to remove AsIII from contaminated water. The properties of the composites and the efficiency of AsIII treatment were measured by modern techniques and methods, such as XPS, SEM-EDS, ICP–MS, BET analyses. The novel composites enhance AsIII removal capacity by up to 99.85%, and exhibited high effectiveness for AsIII removal over a large pH range from 3 to 9. In addition, XPS analysis revealed that the FeCl3-derived composites have the ability to oxidize AsIII into AsV species on the composite surfaces due to its catalytic properties. The novel composites can be considered adsorbents that can treat a large AsIII concentration range to obtain safe aqueous As levels according to the WHO guidelines for drinking water.
AB - Arsenite (AsIII) is the most toxic form of arsenic in drinking water, but AsIII removal is still a challenge. In this study, α-Fe2O3-doped graphitic carbon nanosheets were coated on the surfaces of coconut biochar backbone to remove AsIII from contaminated water. The properties of the composites and the efficiency of AsIII treatment were measured by modern techniques and methods, such as XPS, SEM-EDS, ICP–MS, BET analyses. The novel composites enhance AsIII removal capacity by up to 99.85%, and exhibited high effectiveness for AsIII removal over a large pH range from 3 to 9. In addition, XPS analysis revealed that the FeCl3-derived composites have the ability to oxidize AsIII into AsV species on the composite surfaces due to its catalytic properties. The novel composites can be considered adsorbents that can treat a large AsIII concentration range to obtain safe aqueous As levels according to the WHO guidelines for drinking water.
KW - Arsenic removal
KW - Arsenite oxidation
KW - Biochar
KW - Graphitic carbon nanosheets
KW - Groundwater contamination
KW - α-FeO doped composite
UR - http://www.scopus.com/inward/record.url?scp=85122425266&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122425266&partnerID=8YFLogxK
U2 - 10.1016/j.biteb.2021.100929
DO - 10.1016/j.biteb.2021.100929
M3 - Article
AN - SCOPUS:85122425266
SN - 2589-014X
VL - 17
JO - Bioresource Technology Reports
JF - Bioresource Technology Reports
M1 - 100929
ER -