Synthetic sodalite doped with silver nanoparticles: Characterization and mercury (II) removal from aqueous solutions

被引：19
作者：
Tauanov, Z. [1 ,2 ]
Tsakiridis, P. E. [2 ,3 ]
Shah, D. [1 ]
Inglezakis, V. J. [1 ,2 ]
机构：
[1] Nazarbayev Univ, Chem & Mat Engn Dept, Sch Engn Environm Sci & Technol Grp ESTg, 53 Kabanbay Batyr Ave, Astana 010000, Kazakhstan
[2] Nazarbayev Univ, EREC, Astana, Kazakhstan
[3] Natl Tech Univ Athens, Sch Min & Met Engn, Athens, Greece
来源：
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2019年 / 54卷 / 09期
关键词：
Coal fly ash; synthetic sodalite; silver nanoparticles; mercury removal; nanocomposites; water treatment; COAL FLY-ASH; HYDROTHERMAL SYNTHESIS; ZEOLITE; ADSORPTION; NO;
D O I：
10.1080/10934529.2019.1611129
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this work, a novel silver nanoparticles-doped synthetic sodalitic composite was synthesized and characterized using advanced characterization methods, namely TEM-EDS, XRD, SEM, XRF, BET, zeta potential, and particle size analysis. The synthesized nanocomposite was used for the removal of Hg2+ from 10 ppm aqueous solutions of initial pH equal to 2. The results showed that the sodalitic nanocomposites removed up to 98.65% of Hg2+, which is similar to 16% and 70% higher than the removal achieved by sodalite and parent coal fly ash, respectively. The findings revealed that the Hg2+ removal mechanism is a multifaceted mechanism that predominantly involves adsorption, precipitation and Hg-Ag amalgamation. The study of the anions effect (Cl-, NO3-, C2H3O2-, and SO42-) indicated that the Hg2+ uptake is comparatively higher when Cl- anions co-exist with Hg2+ in the solution.
引用
收藏
页码：951 / 959
页数：9
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