Removal of Fluorine from Zinc Electrolyte by Cerium Silicate

被引：7

作者：

Liao, Zhiqin ^{[1
]}

Zhao, Shijie ^{[1
]}

Dai, Yanyang ^{[1
]}

Li, Zhirong ^{[2
]}

Wang, Mingyu ^{[1
]}

机构：

[1] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

[2] Cent South Univ, Sch Architecture & Art, Changsha 410083, Peoples R China

来源：

JOURNAL OF SUSTAINABLE METALLURGY | 2021年 / 7卷 / 04期

关键词：

Fluorine removal; Adsorption; Zinc electrolyte; AQUEOUS-SOLUTION; SULFATE SOLUTION;

D O I：

10.1007/s40831-021-00449-w

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The impurity fluorine in zinc electrolytic system can severely affect the production of zinc. In this study, six silicate adsorbents were synthesized and applied to the removal of fluorine from the synthesized zinc electrolyte. It is found that cerium silicate adsorbent has the best defluoridation effect. The influences of the adsorption temperature, dosage of adsorbent, and adsorption time on the removal of fluorine were investigated with cerium silicate as the adsorbent. Kinetics analysis indicated that the adsorption process followed the pseudo-second-order kinetic model. The adsorption isotherm fits the Langmuir isotherm model well and the theoretical maximum adsorption capacity was 45.537 mg/g. FTIR and XPS analysis verified that the hydroxyl groups on the adsorbent were responsible for the sorption of fluoride through anion exchange and chemical adsorption. The loaded cerium silicate adsorbent could be regenerated by 0.5 mol/L NaOH solution.

引用

页码：1425 / 1433

页数：9

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