Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 102, Issue 5, Pages 721-729Publisher
SPRINGER
DOI: 10.1007/s00128-019-02559-4
Keywords
Mercury; Heavy metal; Soil remediation; Water treatment; Iron-based sorbents
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Funding
- National Natural Science Foundation of China [41503085, 41603099]
- Natural Science Foundation of Tianjin [17JCYBJC23100]
- Fundamental Research Funds for the Central Universities
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Mercury contamination in soil and water has become a major concern to environmental quality and human health. Among the existing remediation technologies for mercury pollution control, sorption via iron-based materials has received wide attention as they are environmental friendly and economic, and their reactivity is high and controllable through modulating the morphology and surface properties of particulate materials. This paper aimed to provide a comprehensive overview on environmental application of a variety of iron-based sorbents, namely, zero valent iron, iron oxides, and iron sulfides, for mercury remediation. Techniques to improve the stability of these materials while enhancing mercury sequestration, such as nano-scale size control, surface functionalization, and mechanical support, were summarized. Mechanisms and factors affecting the interaction between mercury and iron-based materials were also discussed. Current knowledge gaps and future research needs are identified to facilitate a better understanding of molecular-level reaction mechanisms between iron-based materials and mercury and the long-term stability of the immobilized mercury.
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