The Efficient Removal of Thallium from Sintering Flue Gas Desulfurization Wastewater in Ferrous Metallurgy Using Emulsion Liquid Membrane

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2017 Sep 10

PMID 28887631

Citations 2

Authors

Li Yang

Jiangping Xiao

Yi Shen

Xian Liu

Wensong Li

Weiyan Wang

Yunquan Yang

Affiliations

Soon will be listed here.

Abstract

The removal of thallium ions in flue gas desulfurization wastewater from ferrous metallurgic industry was studied by emulsion liquid membrane (ELM) method using 2-ethylhexyl phosphoric acid-2-ethylhexyl ester (P507) as carrier, aviation kerosene (AK) as organic solvent, polyisobutylene succinimide (T154) as surfactant, polyisobutylene (PIB) as additive, and sulfuric acid as internal reagent. Some important influence parameters such as concentrations of carrier, surfactant and stripping agent, agitation speed, extraction time, volume ratios of feed solution to emulsion phase and internal phase to membrane phase, and their effects on the removal efficiency of Tl in the ELM process were investigated and optimized. Under the optimum operating conditions of 2% of carrier, 5% of surfactant, 0.5 M of stripping agent, 350 rpm of agitation speed, 12.5:1 of volume ratio of feed solution to emulsion phase, and 3:1 volume ratio of membrane to internal phase, the maximum extraction efficiency of thallium reached 99.76% within 15-min reaction time. The ICP-MS analysis indicated that the thallium concentration in treated wastewater was below 5 μg/L and could meet the emission standard demand for industrial wastewater enacted by the local government of Hunan province of China. Meanwhile, the extraction of impurity ions calcium and magnesium in the ELM system was investigated. The result showed that an acidic environment would be in favor of the removal of Tl from calcium and magnesium contained in wastewater. Graphical abstract ᅟ.

Citing Articles

Recent Advances in Thallium Removal from Water Environment by Metal Oxide Material.

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Application of emulsion and Pickering emulsion liquid membrane technique for wastewater treatment: an overview.

Hussein M, Mohammed A, Atiya M Environ Sci Pollut Res Int. 2019; 26(36):36184-36204.

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