膨润土/改性地沟油新型复合吸附剂的制备

Preparation of Composite Adsorbents from Bentonite/Sulfurized Waste Oil

摘要: 本文通过反硫化法，硫磺和地沟油发生本体聚合，结合膨润土，获得膨润土/硫化地沟油复合吸附剂(BSO)，并利用SEM和FT-IR对材料形貌和成分进行表征。通过改变吸附剂的用量、Hg(II)溶液的pH，初始Hg(II)浓度和吸附时间，对材料的吸附性能进行了研究。实验结果表明：当吸附剂用量、汞离子浓度、pH、吸附时间分别为0.02 g、50 mg/L、4和120 min时，吸附效果最好，Hg(II)的最大吸附容量达到88.34 mg/g。此外，BSO具有良好的再生性能，研究发现，使用五次的BSO的吸附量并没有显著降低，仍然保持初始饱和吸附容量的90%。

Abstract: In this paper, bulk solidification of sulfur and waste oil was carried out by reverse vulcanization method, and bentonite was combined to obtain bentonite/sulfurized coal oil composite adsorbent (BSO). The morphology and composition of the material were characterized by SEM and FT-IR. The adsorption properties of the material were studied by changing the dosage of adsorbent, the pH of the mercury ion solution, the initial mercury ion concentration and the adsorption time. The ex-perimental results showed that the adsorption effect is good, and the maximum adsorption capacity of Hg(II) reached to 88.34 mg/g when the amount of adsorbent, mercury ion concentration, pH and adsorption time are 0.02 g, 50 mg/L, 4 and 120 min, respectively. In addition, BSO has good reproducibility. It was found that the adsorption capacity of BSO used five times was not signifi-cantly reduced, reaching 90% of the initial saturated adsorption capacity.