According to the Xinhua News Agency, the reporter learned from the Hefei Institute of Physical Science of the Chinese Academy of Sciences that experts from the Institute of Technical Biology and Agricultural Engineering of the Institute have successfully developed a new nanocomposite material that can efficiently capture and transform harmful heavy metal ions in acidic soils. The average cost per mu does not exceed 30 yuan. This research result was recently published in the American Chemical Society's core journal of green chemistry, ACS Sustainable Chemistry & Engineering.
About 30% of the world's unfrozen soil is acidic soil, which not only causes agricultural production reduction, but also activates heavy metal ions, exacerbates the harmful effects of heavy metals on the human body and pollution to the environment. It is a key issue for agriculture and the environment in China and even the world. .
It is understood that there are two kinds of conventional methods for soil remediation: phytoremediation and chemical remediation. However, there are disadvantages such as high cost, long period, and low efficiency, and the palliative treatment is not a cure. This is also a key technology bottleneck restricting the treatment of acid soil and heavy metal pollution.
Wu Zhengyan, a researcher of the Institute of Technology and Biology of the Hefei Institute of Physics of the Chinese Academy of Sciences, developed a composite nanomaterial that recombines natural materials such as clay and biochar to transform it from a state of aggregation to a loose, reticular structure, capable of dissolving soil. The ph value is raised to near neutrality, and it is able to efficiently collect and capture harmful heavy metal elements in the soil. At the same time, it can also convert harmful elements such as hexavalent chromium into the trivalent chromium, a safe element.
According to reports, this new type of soil remediation material has an average cost of only RMB10 to RMB30, and the remediation process is directly integrated into the cultivation process. It is not only convenient to use, but also greatly improves the efficiency compared to traditional restoration methods, and can be made into powders and liquids. , granules and other forms. Experts said that the material has a broad application prospect and it is expected to achieve mass production next year.
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