Recently, the Environmental Chemistry Research Team of the Guangdong Institute of Science and Technology Analysis (China Guangzhou Analysis Testing Center), in collaboration with the Guangdong Key Laboratory of Chemical Measurement and Emergency Detection Technology and the Zhongkai College of Agricultural Engineering, has developed a biochar-based magnesium composite material through pyrolysis of solid waste for the efficient removal of two pesticides, triazolone and fipronil, from water bodies. The research findings have been published in the journal "Separation and Purification Technology".
Biochar-based magnesium-loaded composite materials efficiently and rapidly remove pesticide residues in water bodies.
In recent years, triazole ketone and fipronil, characterized by high efficiency, low toxicity, and broad spectrum, have been widely used in agricultural production. However, excessive use of pesticides and slow degradation under natural conditions lead to pesticide residues entering water bodies, posing a threat to ecological environment and human health.
This research, funded by the Key Areas R&D Program of Guangdong Province and the Key Areas Program of Ordinary Universities in Guangdong Province, utilized medicinal residues collected from hospitals as raw materials to develop and prepare a highly adsorbent biochar-based magnesium composite material. This material was applied for the single and simultaneous removal of triazole ketone and fipronil from water. The study found that the biochar-based magnesium composite material could efficiently remove triazole ketone and fipronil within 120 minutes, with removal rates of 86.42% and 87.86%, respectively.
Based on characterization analysis before and after the reaction of the biochar-based magnesium composite material, the research team found that the main adsorption mechanisms of triazole ketone and fipronil on the biochar-based magnesium composite material were electrostatic interaction, hydrogen bonding, and pore filling. Compared with other reported biochar-based materials, this biochar-based magnesium composite material exhibited higher adsorption efficiency for triazole ketone and fipronil.
This study not only provides a new strategy for the disposal and resource utilization of medicinal residues but also offers theoretical basis and technical support for the removal of composite pesticide residues in water bodies.
Related paper information: https://doi.org/10.1016/j.seppur.2023.126213
