标题: Preparation of multi-defect calcite based environmental materials from high-alumina fly ash: Mechanism of performance enhancement for Pb removal

作者: Zhang, SS (Zhang, Shanshan); Lan, JR (Lan, Jirong); Yu, LJ (Yu, Lijie); Luo, Y (Luo, Yi); Zeng, TY (Zeng, Tianyu); Zhou, M (Zhou, Min); Hou, HB (Hou, Haobo)

来源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷: 13 期: 2 文献号: 115539 DOI: 10.1016/j.jece.2025.115539 Published Date: 2025 APR

摘要: In this study, a novel material M-AER with multiple lattice defects was produced through phase reconstruction (i. e. Al recovery and mechanical activation) of high-alumina coal fly ash (HAFA). M-AER demonstrates significant potential for the advanced removal of heavy metals from water. The results showed that M-AER was rich in calcite and dicalcium silicate, and ball milling enhanced the immobilization of Pb2+ on its surface, improved its specific surface area, microform and lattice defects, and its maximum immobilizing capacity of Pb(II) was increased from 10.72 mg/g to 69.42 mg/g. Under the low concentration (20 mg/L, pH: 5), the amount of M-AER powder was 0.5 g/L, and more than 99.5 % of soluble lead could be immobilized in 60 min. The removal efficiency of Hg(II), Cu(II), and Cd(II) can also reach 60 %. The surface calcification of M-AER could generate leadcontaining compounds through the exchange of calcium ions with heavy metals, so that the metals, such as lead, could be combined with carbonate and silicate at the interface of liquid-solid. This study provides a new vision to realize the resourceful utilization of HAFA and the efficient immobilization of heavy metals.

作者关键词: High-alumina coal fly ash; Alumina extraction residue; Ball-milling activation; Lead fixation

KeyWords Plus: ARCHITECTURAL CERAMICS; ACTIVATION; EXTRACTION

地址: [Zhang, Shanshan; Yu, Lijie; Luo, Yi; Zeng, Tianyu; Zhou, Min; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Hou, Haobo] Zhaoqing Wuhan Univ, Environm Technol Res Inst, Zhaoqing 526200, Guangdong, Peoples R China.

[Lan, Jirong] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 100872, Peoples R China.

通讯作者地址: Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Lan, JR (通讯作者)，Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 100872, Peoples R China.

电子邮件地址: jironglan@whu.edu.cn; houhb@whu.edu.cn

影响因子：7.4