Fabrication and environmental applications of multifunctional mixed metal-biochar composites (MMBC) from red mud and lignin wastes

被引：200

作者：

Cho, Dong-Wan ^{[1
]}

Yoon, Kwangsuk ^{[3
]}

Ahn, Yongtae ^{[4
]}

Su, Yuqing ^{[2
]}

Tsang, Daniel C. W. ^{[2
]}

Hou, Deyi ^{[5
]}

Ok, Yong Sik ^{[6
]}

Song, Hocheol ^{[3
]}

机构：

[1] Korea Inst Geosci & Mineral Resources, Geol Environm Div, 124 Gwahak Ro, Daejeon 34132, South Korea

[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Hong Kong, Peoples R China

[3] Sejong Univ, Dept Environm & Energy, Seoul 05006, South Korea

[4] Korea Inst Sci & Technol, Ctr Environm Hlth & Welf Res, Seoul 02792, South Korea

[5] Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China

[6] Korea Univ, OJERI, Div Environm Sci & Ecol Engn, Seoul, South Korea

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2019年 / 374卷

关键词：

Waste biomass valorization; Bauxite residue; Syngas production; Engineered biochar; Metallic iron-carbon composites; ZERO-VALENT IRON; GREEN REMEDIATION; CONTAMINATED SOIL; REMOVAL; ADSORPTION; PYROLYSIS; REDUCTION; CARBON; CO; STABILIZATION/SOLIDIFICATION;

D O I：

10.1016/j.jhazmat.2019.04.071

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 N-2 atmosphere, and its ability to treat wastewater containing various contaminants was comprehensively evaluated. A porous structure (BET surface area = 100.8 m(2) 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 degrees 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.

引用

页码：412 / 419

页数：8