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Eco-utilization of silicon-rich lye: Synthesis of amorphous calcium silicate hydrate and its application for recovering heavy metals
Qi, Fang1; Zhu, Ganyu2; Zhang, Yimin1; Hou, Xinjuan2,3; Li, Shaopeng2; Yang, Chennian2; Zhang, Jianbo2; Li, Huiquan2,3
2022-02-01
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume282Pages:12
AbstractDuring sustainable high-value utilization of coal-based solid wastes, a kind of characteristic silicon-rich lye (SRL) generated, and its comprehensive recovery and recycling remains an important subject. Through a simple and facile strategy of mild caustic-crystallization method, SRL was favorably utilized through calcium silicate hydrate (C-S-H) synthesis with silicon conversion efficiency over 97.33%. The micro-morphology of C-S-H presented a typical "honeybee hive " like porous structure with numerous exchangeable activity cations and combination sites in the silicate chain structure. The amorphous C-S-H products possessed marvelous recovery abilities for typical heavy metals as Cu (II), Zn (II), and Cr (III) in industrial wastewater with recovery efficiency all above 99.6% in quite a short period. The recovery mechanism of C-S-H toward heavy metals was revealed as calcium ions exchange and interlayer structure combination with SiO4 and AlO4 tetrahedron through the analysis of characterization technologies and DFT simulation calculation. C-S-H synthesized in SRL contributes to achieving valuable resources conversion and recycling for guiding sustainable development of coal-based solid waste comprehensive utilization.
KeywordSilicon-rich lye Causticization Calcium silicate hydrate Heavy metals Recovery
DOI10.1016/j.seppur.2021.120092
Language英语
WOS KeywordC-S-H ; AQUEOUS-SOLUTION ; FLY-ASH ; RED MUD ; DESILICATION ; ALUMINUM ; ACTIVATION ; ADSORPTION ; EXTRACTION ; COMPOSITE
Funding ProjectProjects of National Natural Science Foundation of China[U1810205] ; Projects of National Natural Science Foundation of China[51804293] ; Key Research and Development Program of Shandong Province (Major Sci-ence and Technology Innovation Project)[2019JZZY010504] ; Youth Innovation Promotion Association CAS[2018066] ; Chinese Academy of Science
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationProjects of National Natural Science Foundation of China ; Key Research and Development Program of Shandong Province (Major Sci-ence and Technology Innovation Project) ; Youth Innovation Promotion Association CAS ; Chinese Academy of Science
WOS IDWOS:000780442000002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/52728
Collection中国科学院过程工程研究所
Corresponding AuthorZhu, Ganyu; Zhang, Yimin
Affiliation1.Wuhan Univ Sci & Technol, Coll Resources & Environm Engn, State Environm Protect Key Lab Mineral Met Resour, Wuhan 430081, Hubei, Peoples R China
2.Chinese Acad Sci, Natl Engn Res Ctr Green Recycling Strateg Met Res, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Qi, Fang,Zhu, Ganyu,Zhang, Yimin,et al. Eco-utilization of silicon-rich lye: Synthesis of amorphous calcium silicate hydrate and its application for recovering heavy metals[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,282:12.
APA Qi, Fang.,Zhu, Ganyu.,Zhang, Yimin.,Hou, Xinjuan.,Li, Shaopeng.,...&Li, Huiquan.(2022).Eco-utilization of silicon-rich lye: Synthesis of amorphous calcium silicate hydrate and its application for recovering heavy metals.SEPARATION AND PURIFICATION TECHNOLOGY,282,12.
MLA Qi, Fang,et al."Eco-utilization of silicon-rich lye: Synthesis of amorphous calcium silicate hydrate and its application for recovering heavy metals".SEPARATION AND PURIFICATION TECHNOLOGY 282(2022):12.
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