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Recently, scientists from the Institute of Plasma Physics at the Institute of Plasma Physics, Chinese Academy of Sciences, Institute of Plasma Physics, Chinese Academy of Sciences, successfully prepared nano-Zr-valence/graphene composites (NZVI/rGOs) using H2/Ar mixed-gas plasma and applied them. The valence state of the soluble and radioactive elements and the adsorption and reduction of metal ions.
Nano zero-valent iron has the advantages of small particle size, high reactivity, and strong reduction ability. Nano-zero-valent iron has a significant effect on the treatment of refractory contaminants such as chlorinated organic matter, heavy metal ions, and radioactive elements in wastewater. The role and contribution in ecological environmental protection and pollution control are increasing. At the same time, as a new technology that can provide cost-effective solutions in the remediation and treatment of contaminated soils and water bodies, the application of nano-zero-valent iron in the treatment and remediation of environmental pollution has become a new type of pollution control technology that has attracted much attention. However, nano-zero-valent iron is easily agglomerated and easily oxidized, which limits its application.
Researchers at the Plasma Research Laboratory used a H2/Ar mixed gas plasma to load nano-zero-valent iron on graphene to prepare a nanoscale zero-valent iron/graphene composite. Not only can improve the dispersion and stability of nano-zero-valent iron, graphene can also enhance the electron transfer and pre-concentration of pollutants, couple the advantages of graphene and nano-zero-valent iron, and improve its high water solubility for variable-valence states. Synergistic removal performance of adsorption and reduction of radioactive elements and metal ions. After the radioactive elements and metal ions are desorbed from the nano-zero-valent iron/graphene composite, the nano-zero-valent iron/graphene composite material can be regenerated by the H2/Ar mixed gas plasma reduction.
Relevant work results were published in "China Science: Chemistry" (English Edition, 2015 edition), "Chemistry-An Asian Journal" (DOI: 10.1002/asia.201500242), and "Journal of Physical Chemistry" of the American Chemical Society ( The Journal of Physical Chemistry C, 2014, 118(49), 28440–28447), Journal of Hazardous Materials, 2014, 280, 399-408 and other SCI publications.
The above research work has been supported by national major scientific research project and National Natural Science Foundation projects.
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