Department of Chemical Engineering, Federal University of Pernambuco, Recife, 50670-901, Brazil.
Advanced Institute of Technology and Innovation, Recife, 50070-280, Brazil.
Environ Sci Pollut Res Int. 2021 Sep;28(34):47492-47502. doi: 10.1007/s11356-021-14067-2. Epub 2021 Apr 24.
This work investigated the efficiency of bioremediation of heavy fuel oil (HFO) in aqueous solutions by living Eichhornia crassipes (Mart.) Solms, also known as water hyacinth. Possibility of using post-biosorption macrophytes to produce briquettes was also studied. HFO was characterized by its density, viscosity, and Fourier-transform infrared spectroscopy. Water hyacinth was characterized by scanning electron microscope, pH of zero point of charge, buoyancy, and wettability. Experiments were performed to evaluate effects of contact time and initial oil concentration on biosorption. E. crassipes presented a hydrophobic nature, ideal for the treatment of oily effluents. Hollow structures in macrophytes were also identified, which favor capillary rise and retention of oils of high density and viscosity. Biosorption efficiency of HFO reached 94.8% in tests with initial concentration of 160 mg.L. A calorific value of 4022 kcal.kg was obtained in briquettes made of water hyacinth post-biosorption. These results reinforce the great potential of E. crassipes as a sustainable and efficient alternative for treatment of oily effluents.
本研究旨在探讨活体凤眼蓝（Eichhornia crassipes）（又称水葫芦）对水相中的重燃料油（HFO）进行生物修复的效率，同时也研究了利用生物吸附后的大型藻类生产煤球的可能性。通过密度、粘度和傅里叶变换红外光谱对 HFO 进行了表征，利用扫描电子显微镜、零电荷 pH 值、浮性和润湿性对凤眼蓝进行了表征。通过实验评估了接触时间和初始油浓度对生物吸附的影响。凤眼蓝具有疏水性，非常适合处理含油废水。大型藻类中的中空结构也有利于高密度和高粘度油的毛细上升和保留。在初始浓度为 160mg.L 的试验中，HFO 的生物吸附效率达到了 94.8%。生物吸附后的水葫芦制成的煤球的热值为 4022kcal.kg。这些结果表明，凤眼蓝作为一种可持续且高效的处理含油废水的替代方法具有巨大的潜力。
