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A green desilication method from highly concentrated chromate solutions by Mg-Al-CO3 LDH

Chen, Xing1,2; Liu, Wenke1; Luo, Ling1,3; Han, Yunwu1; Zhang, Hailin1; Zheng, Shili1,2; Zhang, Yi1; Li, Ping1,2,4
2022-04-01
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume286Pages:7
AbstractThe Mg-Al-CO3 LDH was synthesized as a desilication agent to effectively and environmentally remove Si(IV) from Na2CrO4-NaAlO2-NaVO3-Na2SiO3-H2O solutions. It was observed that the changes of reaction parameters including temperature, NaOH concentration, time, the dosage of Mg-Al-CO3 LDH and NaAlO2 concentration significantly affected the desilication efficiency, while the effect of Cr(VI) and V(V) concentration on the desilication was negligible. The results showed that 91.5% Si(IV) could be removed after desilication at 90 ? for 6 h with the additive of 4 g/L Mg-Al-CO3 LDH, without the formation of hazardous Cr(VI)-containing compounds. It could be concluded that the desilication mechanism was dominated by the synergistic effect between the ion exchange of Si(IV) and the formation of zeolite compounds. The method proposed in this study provides a new insight for Si(IV) removal from the highly concentrated Cr(VI) solutions in the chromate clean production.
KeywordDesilication Mg-Al-CO3 LDH Zeolite precipitation Ion exchange & nbsp Synergistic effect
DOI10.1016/j.seppur.2021.120432
Language英语
WOS KeywordLAYERED DOUBLE HYDROXIDES ; MG-AL ; HYDROTHERMAL SYNTHESIS ; ALKALI SOLUTION ; SILICATE ; HYDROTALCITE ; NMR ; POLYMERIZATION ; ADSORPTION ; CHEMISTRY
Funding ProjectNational Natural Science Founda-tion of China[51974285] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-3]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Founda-tion of China ; Key Research Program of the Chinese Academy of Sciences
WOS IDWOS:000781385700004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/52857
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Hailin; Li, Ping
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, 1 North Second St, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, 30 Xueyuan Rd, Beijing 100083, Peoples R China
4.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xing,Liu, Wenke,Luo, Ling,et al.

A green desilication method from highly concentrated chromate solutions by Mg-Al-CO3 LDH

[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,286:7.
APA Chen, Xing.,Liu, Wenke.,Luo, Ling.,Han, Yunwu.,Zhang, Hailin.,...&Li, Ping.(2022).

A green desilication method from highly concentrated chromate solutions by Mg-Al-CO3 LDH

.SEPARATION AND PURIFICATION TECHNOLOGY,286,7.
MLA Chen, Xing,et al."

A green desilication method from highly concentrated chromate solutions by Mg-Al-CO3 LDH

".SEPARATION AND PURIFICATION TECHNOLOGY 286(2022):7.
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