生物炭负载多功能微生物菌群强化土壤DBP污染修复的机制

邻苯二甲酸二丁酯（DBP）是塑料农膜中广泛使用的增塑剂，对我国农田土壤污染严重，威胁土壤可持续利用和人类健康。生物修复是目前国际公认的有效消除环境中DBP污染的修复技术。生物炭作为土壤改良剂具有优良的吸附性能，是近年来崛起的修复土壤污染的新兴方法。然而，如何将两种修复技术科学结合以最大限度的发挥生物炭物化阻控和微生物生物降解功能仍是当前科学研究的空白领域。本项目拟利用DBP降解微生物和对土壤养分循环具有重要作用的微生物构建多功能微生物菌群，通过物理吸附和化学固定等方式将其负载到玉米秸秆基生物炭上，建立生物炭-微生物复合体系修复土壤DBP污染，探明影响污染物去除速率与功能菌株功能活性耦合联系的关键因子，揭示秸秆基生物炭负载多功能微生物菌群强化土壤DBP污染修复的机制，实现高效修复DBP污染同时提升土壤环境功能。

Dibutyl phthalate (DBP) is a widely used plasticizer in agricultural film, which seriously pollutes farmland soils and threatens human health. Bioremediation is an internationally recognized remediation technology that can effectively eliminate DBP contamination in the environment. Biochar, as a soil amendment, has excellent adsorption properties and is an emerging method for remediation of contaminated soil in recent years. However, how to combine the two remediation techniques scientifically to maximize the biochar physicochemical control and microbial biodegradation is still a blank area of current scientific researches. This project intends to construct a multi-functional microbial flora using DBP-degrading microorganisms and soil nutrient cycling beneficial microorganisms. The microbial flora will be loaded on corn straw-based biochar by physical adsorption and chemical fixation, establishing a biochar-microbial composite system. The key factors affecting the coupling relationship between the removal rate of pollutants and the functional activity of bacteria wiil be explored, and the remediation mechanism of DBP polluted soil by straw biochar loaded multi-functional microbial flora will be revealed. To achieve the goal of effective remediation of DBP pollution and improvement of soil environmental function.