Carbon steel slag and stainless steel slag for removal of arsenic from stimulant and real groundwater

  • W. ShiEmail author
  • H. Li
  • G. Liao
  • G. Pei
  • Y. Lin
Original Paper


Arsenic in groundwater is a serious environmental problem. The contamination of groundwater with arsenic has been of utmost concern worldwide. Steel slag is a solid waste generated from steel production. Although steel slags have been used for arsenic removal from water, this process has not been systematically or integratively researched. In this study, the arsenic removal capacity and mechanism were investigated for carbon steel slag, stainless steel slag and Fe-modified stainless steel slag based on an in-depth study. The study also evaluated the potential utilization of different steel slag for regeneration. The maximum adsorption of arsenic on carbon steel slag, stainless steel slag and Fe-modified stainless steel slag was 12.20, 3.17 and 12.82 mg g−1 at 25 °C, respectively. The modification of stainless steel slag by FeC13 can generate more pore structures and larger surface areas, and 300 °C treatment produces the best regeneration efficiency. The ΔG values were negative for all of the steel slags, indicating the spontaneous nature of the adsorption process. The solution pH was a critical parameter for the removal of arsenic for steel slags. Under highly alkaline solution conditions, the mechanism of arsenic removal by carbon steel slag and stainless steel slag can be attributed to chemisorption, including chemical precipitation and coordination reactions, and under weakly alkaline solution conditions, electrostatic interaction and specific adsorption are the arsenic removal mechanisms by Fe-modified stainless steel slag. Regeneration of the Fe-modified stainless steel slag was better achieved than that of the other steel slags in the application of high-temperature treatment.


Arsenic pollution Groundwater remediation Modification Regeneration experiment Steel slag 



This research was supported by the Grand Science and Technology Special Project of Shanxi Province (20111101016), the Science & Technology Key Program of Shanxi Province (20140311008-6), Fundamental Research Funds for the Central Universities (SWU116087 and XDJK2017B013) and New Star Foundation on Shaanxi Province Youth Science and Technology (2016KJXX-89).

Supplementary material

13762_2017_1603_MOESM1_ESM.docx (17 kb)
Supplementary material 1 (DOCX 17 kb)


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Copyright information

© Islamic Azad University (IAU) 2017

Authors and Affiliations

  1. 1.Chongqing Key Laboratory of Karst Environment, School of Geographical SciencesSouthwest UniversityChongqingChina
  2. 2.School of Environmental Science and ResourcesShanxi UniversityTaiyuanChina
  3. 3.Department of Civil and Environmental EngineeringNortheastern UniversityBostonUSA

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