Environmental Science and Pollution Research

, Volume 23, Issue 6, pp 5352–5360 | Cite as

Migration and transformation rule of heavy metals in sludge during hydrolysis for protein extraction

  • Yulong Li
  • Fei Xue
  • Jiebing Li
  • Shi hong Xu
  • Dengxin Li
Research Article


The content and speciation of heavy metals can fundamentally affect the hydrolysis of sludge. This research study investigates the migration and transformation rule of heavy metals during the hydrolysis process by measuring the content of exchangeables (F1), bound to carbonates (F2), bound to Fe-Mn oxides (F3), bound to organic matter (F4), and residuals (F5) under different periods of time undergoing hydrolysis. The results show that the hydrolysis process generally stabilized Cu, Zn, Mn, Ni, Pb, Cr, and As by transforming the unstable states into structurally stable states. Such transformations and stabilization were primarily caused by the changes in local metal ion environment and bonding structure, oxidation of sulfides, pyrolyzation of organic matter, and evaporation of resulting volatile materials. An X-ray diffractometry (XRD) of the residuals conducted after hydrolysis indicated that hydrolysis did have a significant influence on the transportation and transformation of heavy metals.


Migration and transformation Heavy metals Sludge Hydrolysis 



This work was financially supported by Specialized Research Fund for the Doctoral Program of Higher Education of China (20130075110006) and “Textile light” application basic research of China (J201503) and the Fundamental Research Funds for the Central Universities (15D111321).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Yulong Li
    • 1
  • Fei Xue
    • 1
  • Jiebing Li
    • 1
  • Shi hong Xu
    • 1
  • Dengxin Li
    • 1
  1. 1.College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile IndustryDonghua UniversityShanghaiChina

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