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Investigating the Adsorption Effect of Biochar on Microplastic Pollutants in Soil
Summary
This study reviews how biochar can adsorb and remove microplastics from contaminated soil through physical and chemical mechanisms. Researchers found that biochar's high surface area and functional groups are key factors in its microplastic adsorption capacity, and that acidic soil conditions improve removal efficiency. The findings suggest biochar application could be a practical approach for addressing microplastic pollution in agricultural soils.
Microplastic pollution poses a serious threat to soil health and ecological security. Biochar, with its high specific surface area and abundant surface functional groups, shows potential application value in the treatment of soil microplastic pollution. Starting from the physical and chemical properties of biochar, this paper aims to explore the adsorption mechanism of biochar on microplastics in soil and analyze the influence of environmental conditions on adsorption efficiency. Research shows that biochar effectively removes microplastics from soil through physical and chemical adsorption mechanisms. The high specific surface area and abundant surface functional groups of biochar are the key factors for its efficient adsorption of microplastics. In addition, environmental conditions such as pH and ionic strength significantly affect adsorption efficiency, and biochar has a better adsorption effect on microplastics under acidic conditions. This paper points out the intrinsic mechanism of biochar adsorbing microplastics, which is of certain significance for promoting soil ecological security and sustainable development.