Hydrocarbon contamination due to anthropogenic activities is a major environmental concern worldwide. The present study focuses on biochar prepared from fruit and vegetable waste and sewage sludge using a thermochemical approach and its application for the enhanced bioremediation (biostimulation and bioaugmentation) of diesel-polluted soil. The biochar was characterized using FTIR (Fourier-transform infrared spectroscopy), elemental analysis, surface area analysis, and pore analysis. Adsorption experiments showed that hydrocarbon degradation was attributed to biological processes rather than adsorption. The study found that various biochar amendments could significantly increase the rate of hydrocarbon biodegradation with removal efficiencies > 70%. Bioaugmentation using cow dung further improved the removal efficiency to 82%. Treatments showing the highest degree of removal efficiency indicated the presence of 27 different bacteria phyla with Proteobacteria and Actinobacteria as the most abundant phyla. The present study concludes that biochar amendments have great potential for enhancing the bioremediation of soils contaminated with diesel range hydrocarbons.

中文翻译：

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使用有机废物制成的生物炭增强了土壤中柴油机碳氢化合物的生物修复。

人为活动引起的碳氢化合物污染是全球主要的环境问题。本研究的重点是使用热化学方法从果蔬废料和污水污泥中制备生物炭，并将其应用于增强柴油污染土壤的生物修复（生物刺激和生物强化）。使用FTIR（傅立叶变换红外光谱法），元素分析，表面积分析和孔分析对生物炭进行表征。吸附实验表明，碳氢化合物的降解归因于生物过程而不是吸附。研究发现，各种生物炭改良剂可以显着提高烃类生物降解率，去除效率> 70％。使用牛粪的生物强化进一步将去除效率提高到82％。显示出最高去除效率的处理表明存在27种细菌菌门，其中细菌杆菌和放线菌为最丰富的菌门。本研究得出的结论是，生物炭改良剂具有增强被柴油碳氢化合物污染的土壤的生物修复的巨大潜力。