ORIGINAL RESEARCH
Stabilization/Solidification Treatment
of Cadmium-Bearing-Residue
with Magnesium Slag
| 1 | School of Metallurgy and Environment, Central South University, Changsha, Hunan, China |
| 2 | School of Materials Science and Engineering, Beifang Uinversity of Nationalities, Yinchuan, Ningxia, China |
| 3 | Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution,
Changsha, Hunan, China |
| 4 | School of Material Science and Engineering, Central South University, Changsha, Hunan, China |
CORRESPONDING AUTHOR
Fenglan Han
School of Materials Science and Engineering, Beifang Uinversity of Nationalities, Yinchuan, Ningxia, 204 Wenchangbeilu, Yinchuan, Ningxia, China, 750021 Yinchuan, China
School of Materials Science and Engineering, Beifang Uinversity of Nationalities, Yinchuan, Ningxia, 204 Wenchangbeilu, Yinchuan, Ningxia, China, 750021 Yinchuan, China
Online publish date: 2019-08-06
Submission date: 2018-09-02
Final revision date: 2018-11-08
Acceptance date: 2018-11-21
KEYWORDS
TOPICS
Toxic substancesTreatment and managementMethods for solid waste disposalHeavy metalsPolicies for environmentally sustainable developmentHeavy metals - others
ABSTRACT
Stabilizing/Solidifying cadmium in residue is a great challenge to the treatment of solid waste. In
this work, a new stabilization process was proposed to dispose of simulated cadmium-bearing-residue
(CBR) by using magnesium slag of the same high-hydration and gelling properties as a binder. A sharp
decline in cadmium leaching contraction from 1415 mg·L-1 to less than 1 mg·L-1 was obtained in this new
process. The XRD, FT-IR and XPS results indicated it was hydration products and silicates produced
by magnesium slag that could promote cadmium (Cd) to take place of calcium (Ca) and immobilize
cadmium in the residue. The European Community Bureau of Reference (BCR) experiment also
discovered that more reducible, oxidizable and residual fraction in favour of restrained environmental
availability was produced in the process.
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