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Iron-based primary battery realizes rapid remediation of heavy metal-contaminated water

  • Iron-based primary battery realizes rapid remediation of heavy metal-contaminated water
    Schematic illustration of removal mechanism. Credit: Guo Xinyue

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Chinese Academy of Sciences
The Chinese Academy of Sciences is the linchpin of China's drive to explore and harness high technology and the natural sciences for the benefit of China and the world.

In a recent study published in the Journal of Environmental Chemical Engineering, researchers report a promising remedy for the rapid and efficient removal of cadmium ion Cd(II) in water, which is a step forward in heavy metal pollution remediation.

Researchers from Wu Zhengyan and Zhang Jia's team at the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS), in collaboration with Prof. Cai Dongqing from Donghua University, have integrated nanoscale zero-valent iron with conductive carbon paint to fabricate a primary battery nanosystem and found the nanocomposite removed Cd(II) in water quickly.

Water contaminated by heavy metal ions has become a worldwide environmental risk for years. Cd(II) is a typical heavy metal ion drawing much concern because of its high toxicity. Developing an economical and environmentally friendly restoration technology remains a huge challenge.

In this study, the researchers revealed the mechanism by studying the interaction between nanocomposites and Cd(II), following an investigation in the removal performance of the nanocomposites under different conditions. Additionally, the biosafety of this strategy was evaluated and the results were proved satisfying.

This study provides a low-cost and environmentally friendly technology for the rapid removal of Cd(II) from water, which has broad application prospects in the environmental field.

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