Environmental Science and Pollution Research

, Volume 24, Issue 31, pp 24214–24222 | Cite as

The efficient removal of thallium from sintering flue gas desulfurization wastewater in ferrous metallurgy using emulsion liquid membrane

  • Li Yang
  • Jiangping Xiao
  • Yi Shen
  • Xian Liu
  • Wensong Li
  • Weiyan Wang
  • Yunquan YangEmail author
Research Article


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


Emulsion liquid membrane Thallium Flue gas desulfurization wastewater Removal Influence parameter 



This research was supported by the National Science and Technology Major Project of China on the Water Pollution Control and Treatment (No. 2010ZX07212-008), the Project of Hunan Provincial Natural Science Foundation of China (No. 14JJ5027), and the industrial partner of Hunan Valin Energy-Saving & Environmental Protection Technology Co., Ltd.


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Li Yang
    • 1
  • Jiangping Xiao
    • 2
  • Yi Shen
    • 2
  • Xian Liu
    • 2
  • Wensong Li
    • 1
  • Weiyan Wang
    • 1
  • Yunquan Yang
    • 1
    Email author
  1. 1.School of Chemical EngineeringXiangtan UniversityXiangtan CityPeople’s Republic of China
  2. 2.Hunan Valin Energy-Saving & Environmental Protection Technology Co., Ltd.Zhucheng CityChina

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