Department of Microbiology, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
Environ Monit Assess. 2020 Aug 7;192(9):569. doi: 10.1007/s10661-020-08540-7.
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.
由于人为活动造成的碳氢化合物污染是全世界主要的环境关注点。本研究聚焦于使用热化学方法由水果和蔬菜废物及污水淤泥制备的生物炭，及其在增强柴油污染土壤的生物修复（生物刺激和生物增强）中的应用。利用傅里叶变换红外光谱（FTIR）、元素分析、表面积分析和孔隙分析对生物炭进行了表征。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显著提高碳氢化合物生物降解的速度，去除效率＞70%。使用牛粪进行生物增强进一步将去除效率提高到 82%。显示最高去除效率的处理表明存在 27 种不同的细菌门，其中变形菌门和放线菌门是最丰富的门。本研究得出结论，生物炭改良剂在增强受柴油范围内碳氢化合物污染土壤的生物修复方面具有巨大潜力。
