Seaweed bio-chars modified with metal chloride for elemental mercury capture from simulated flue gas

被引：21
|
作者：
Liu, Dongjing [1 ]
Xu, Wen [1 ]
Liu, Yangxian [1 ]
机构：
[1] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China
来源：
ATMOSPHERIC POLLUTION RESEARCH | 2020年 / 11卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Mercury adsorption; Bio-char; Metal chloride; Seaweed; Algae; ACTIVATED CARBON; PHOTOCATALYTIC OXIDATION; CATALYTIC-OXIDATION; HG-0; REMOVAL; ADSORPTION; COMPOSITE; OXIDES; VAPOR; NOX; MN;
D O I：
10.1016/j.apr.2020.03.006
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Metal chloride-impregnated seaweed bio-chars, derived from waste algae (Enteromorpha), are served as solid sorbents for Hg-0 capture from simulated flue gas. The impacts of various metal chloride modification on Hg-0 removal performance, i.e. FeCl3 , CuCl2 , ZnCl2 , CoCl2 , and CeCl3 , are studied. The results display that the Hg-0 removal performances of Enteromorpha derived bio-chars are greatly enhanced by immersing metal chlorides. FeCl3-and CeCl3 -modified bio-chars exhibits the optimal Hg-0 removal performance. Oxygen and NO show a promotional effect on Hg-0 removal, whereas H2O suppresses Hg-0 adsorption. Lower concentration of SO2 favors Hg-0 removal, but higher concentration of SO2 inhibits Hg-0 adsorption. Hg-0 is oxidized by covalent chloride groups and metal oxides on the metal chloride-impregnated bio-chars.
引用
收藏
页码：122 / 130
页数：9
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