TY - JOUR
T1 - Fabrication and environmental applications of multifunctional mixed metal-biochar composites (MMBC) from red mud and lignin wastes
AU - Cho, Dong Wan
AU - Yoon, Kwangsuk
AU - Ahn, Yongtae
AU - Sun, Yuqing
AU - Tsang, Daniel C.W.
AU - Hou, Deyi
AU - Ok, Yong Sik
AU - Song, Hocheol
N1 - Funding Information:
This work was supported by the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (Project code: 19-3413 ) and the Hong Kong Research Grants Council ( E-PolyU503/17 and PolyU 15217818 ).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/7/15
Y1 - 2019/7/15
N2 - This study fabricated a new and multifunctional mixed metal-biochar composites (MMBC) using the mixture of two abundant industrial wastes, red mud (RM) and lignin, via pyrolysis under N2 atmosphere, and its ability to treat wastewater containing various contaminants was comprehensively evaluated. A porous structure (BET surface area = 100.8 m2 g−1) was created and metallic Fe was formed in the MMBC owing to reduction of Fe oxides present in RM by lignin decomposition products during pyrolysis at 700 °C, which was closely associated with the transformation of liquid to gaseous pyrogenic products. The potential application of the MMBC was investigated for the removal of heavy metals (Pb(II) and Ni(II)), oxyanions (As(V) and Cr(VI)), dye (methylene blue), and pharmaceutical/personal care products (para-nitrophenol and pCBA). The aluminosilicate mineral, metallic Fe, and porous carbon matrix derived from the incorporation of RM and lignin contributed to the multifunctionality (i.e., adsorption, chemical reduction, and catalytic reaction) of the MMBC. Thus, engineered biochar composites synthesized from selected industrial wastes can be a potential candidate for environmental applications.
AB - This study fabricated a new and multifunctional mixed metal-biochar composites (MMBC) using the mixture of two abundant industrial wastes, red mud (RM) and lignin, via pyrolysis under N2 atmosphere, and its ability to treat wastewater containing various contaminants was comprehensively evaluated. A porous structure (BET surface area = 100.8 m2 g−1) was created and metallic Fe was formed in the MMBC owing to reduction of Fe oxides present in RM by lignin decomposition products during pyrolysis at 700 °C, which was closely associated with the transformation of liquid to gaseous pyrogenic products. The potential application of the MMBC was investigated for the removal of heavy metals (Pb(II) and Ni(II)), oxyanions (As(V) and Cr(VI)), dye (methylene blue), and pharmaceutical/personal care products (para-nitrophenol and pCBA). The aluminosilicate mineral, metallic Fe, and porous carbon matrix derived from the incorporation of RM and lignin contributed to the multifunctionality (i.e., adsorption, chemical reduction, and catalytic reaction) of the MMBC. Thus, engineered biochar composites synthesized from selected industrial wastes can be a potential candidate for environmental applications.
KW - Bauxite residue
KW - Engineered biochar
KW - Metallic iron-carbon composites
KW - Syngas production
KW - Waste biomass valorization
UR - http://www.scopus.com/inward/record.url?scp=85066421994&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2019.04.071
DO - 10.1016/j.jhazmat.2019.04.071
M3 - Article
C2 - 31029746
AN - SCOPUS:85066421994
SN - 0304-3894
VL - 374
SP - 412
EP - 419
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -