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为了对木屑这种天然生物质作为吸附材料进行研究,采用碱性双氧水对其进行改性并研究其吸油性能。通过实验,比较了不同改性溶液浓度以及不同改性时间的吸油量,发现经1%H2O2浸泡改性18 h后,改性木屑(HNCS)的吸附能力大大提高,吸油量达9.4 g·g~(-1),而改性前仅为6.47 g·g~(-1),改性使得吸油量提高了45%。同时研究了改性木屑对不同油品的吸油性能的测定,结果显示改性木屑对原油的吸附效果最好。通过扫描电镜(SEM)、热重失重分析以及红外扫描光谱分析研究了改性木屑的物化性能。发现经改性后,木屑的表面更加粗糙,出现了大量的吸附孔隙,且热稳定性提高,表面的亲水基团减少。说明吸油量受到材料内部的孔隙结构,以及表面官能团的影响。
In order to study the natural biomass such as sawdust as adsorbent, it was modified with alkaline hydrogen peroxide and its oil absorption performance was studied. Through experiments, the oil absorptions of different modified solutions and different modification times were compared. It was found that the adsorption capacity of modified wood chips (HNCS) was greatly improved after being soaked in 1% H2O2 for 18 h, the oil absorption reached 9.4 g · g ~ (-1), while it was only 6.47 g · g -1 before modification. The modification resulted in a 45% increase in oil absorption. At the same time, the study of the modified woodchips oil absorption performance of different oil, the results show that the modified wood chips on the best adsorption of crude oil. The physicochemical properties of modified sawdust were studied by scanning electron microscopy (SEM), TG-DTA and infrared scanning spectroscopy. After modification, the surface of sawdust was rougher, a large number of adsorbed pores appeared, and the thermal stability was improved and the hydrophilic groups on the surface were reduced. Oil absorption by the material within the pore structure, as well as the role of surface functional groups.