<p>A green desilication method from highly concentrated chromate solutions by Mg-Al-CO3 LDH</p>

doi:10.1016/j.seppur.2021.120432

CAS OpenIR

	A green desilication method from highly concentrated chromate solutions by Mg-Al-CO3 LDH
	Chen, Xing 1,2; Liu, Wenke 1; Luo, Ling 1,3; Han, Yunwu 1; Zhang, Hailin 1; Zheng, Shili 1,2; Zhang, Yi 1; Li, Ping1,2,4
	2022-04-01
Source Publication	SEPARATION AND PURIFICATION TECHNOLOGY
ISSN	1383-5866
Volume	286 Pages:7
Abstract	The 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.
Keyword	Desilication Mg-Al-CO3 LDH Zeolite precipitation Ion exchange & nbsp Synergistic effect
DOI	10.1016/j.seppur.2021.120432
Language	英语
WOS Keyword	LAYERED DOUBLE HYDROXIDES ; MG-AL ; HYDROTHERMAL SYNTHESIS ; ALKALI SOLUTION ; SILICATE ; HYDROTALCITE ; NMR ; POLYMERIZATION ; ADSORPTION ; CHEMISTRY
Funding Project	National Natural Science Founda-tion of China[51974285] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-3]
WOS Research Area	Engineering
WOS Subject	Engineering, Chemical
Funding Organization	National Natural Science Founda-tion of China ; Key Research Program of the Chinese Academy of Sciences
WOS ID	WOS:000781385700004
Publisher	ELSEVIER
Citation statistics
Document Type	期刊论文
Identifier	http://ir.ipe.ac.cn/handle/122111/52857
Collection	中国科学院过程工程研究所
Corresponding Author	Zhang, Hailin; Li, Ping
Affiliation	1.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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