Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (9): 1339-1342.DOI: -

• Resources & Civil Engineering • Previous Articles     Next Articles

Passivation Performance of Sodium Sulfide on Heavy Metal Ions in Soil

WEI Dezhou, LIU Wengang, MI Jinyue, GAO Shuling   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2013-02-27 Revised:2013-02-27 Online:2013-09-15 Published:2013-04-22
  • Contact: LIU Wengang
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Abstract: Sodium sulfide was used as passivator to deal with artificial simulation heavy metal contaminated soil with Cu2+,Zn2+ and Cr3+. The results show that sodium sulfide has effective passivation ability to the three heavy metal ions, and more than 95% passivation rates can be acquired for every heavy metal ion. X ray diffraction analysis result reveals that passivation products which contain CuS, ZnS and Cr(OH)3 can be obtained when sodium sulfide react with heavy metal ions. Solution chemistry analysis result shows that sulfide precipitation can be generated by sulfur ion reacting with heavy metal ions,or hydroxide precipitation can be generated by hydroxyl ion generated from sulfur ion hydrolysis reacting with heavy metal ions,so heavy metal ions can be removed by sodium sulfide.

Key words: sodium sulfide, heavy metal ions, passivation performance, soil, passivation mechanism

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