文献类型：期刊文献

英文题名：Synthesis of ZSM-5 zeolite from desiliconization solution of coal fly ash and adsorption properties of Pb 2+containing wastewater

作者：Yin, Jing-Ping[1];Gu, Xuan-Ning[1];Wei, Ting[2];Xiao, Jia-Li[3];Sun, Shu-Ying[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Yang Zhou Polytech Inst, Yangzhou 225127, Peoples R China

年份：2026

卷号：91

起止页码：371

外文期刊名：CHINESE JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20261020226602);WOS:【SCI-EXPANDED(收录号:WOS:001808679000001)】；

基金：This work was supported by National Key Research & Devel-opment Program of China (2021YFC2902603) and Natural Science Foundation of the Jiangsu Higher Education Institutions of China (25KJA4500 02) .

语种：英文

外文关键词：Zeolite; Recovery; Desiliconization solution; Adsorption; Pb-2+

摘要：The desiliconization solution is a byproduct generated during the extraction of aluminum from high-alumina fly ash. While there is considerable research on the reutilization of fly ash, there is a paucity of studies on managing the waste liquid derived from this process. The desiliconization solution exhibits high alkali content, and inadequate treatment could lead to significant environmental contamination. In this research, the synthesis of Zeolite Socony Mobil-5 (ZSM-5) zeolite involved the utilization of a desiliconization solution as a source of silicon and aluminum. The study assessed the impact of various impurities present in the desiliconization solution on the synthesis of ZSM-5 zeolite. Lithium and potassium ions had minimal influence and somewhat enhanced the relative crystallinity of the zeolite within a specific range. The negatively charged surface of ZSM-5 zeolite showed no significant reaction to small concentrations of lithium and potassium ions, which primarily resided on the zeolite surface to maintain charge equilibrium. Conversely, ferric ions, having a charge similar to aluminum ions in the structure, could potentially compete with aluminum ions. The findings indicated that concentrations of lithium, potassium, calcium, and iron below 0.6, 0.5, 0.03, and 0.04 g & centerdot;L-1, respectively, did not exert adverse effects on the crystallinity of ZSM-5 zeolite. Furthermore, the mesoporous ratio of ZSM-5 zeolite was enhanced through sodium hydroxide modification. Assessment of the adsorption performance of ZSM-5 zeolite for lead demonstrates that the saturated adsorption capacities of impurity-containing and impurity-free zeolites are 91.46 and 137.76 mg & centerdot;g-1 , respectively. This procedure facilitates the high-value utilization of desiliconization liquid by employing synthetic zeolites to address lead-containing waste liquid, thereby achieving waste-to-waste conversion. Additionally, it offers insights for the production of ZSM-5 from alternative high-silicon waste sources. (c) 2025 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.