文献类型：期刊文献

中文题名：大孔磁性聚合物载体的制备及其固定化硫酸盐还原菌的研究

英文题名：Preparation of macroporous magnetic polymer carrier and study on immobilized sulfate reducing bacteria

作者：张婷[1];李昀[1];冯新慧[1];周晓龙[1]

机构：[1]华东理工大学化工学院石油加工系,上海200237

年份：2019

卷号：50

期号：3

起止页码：3090

中文期刊名：功能材料

外文期刊名：Journal of Functional Materials

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

语种：中文

中文关键词：高内相乳液模板法;磁性;固定化;硫酸盐废水;硫酸盐还原菌

外文关键词：high internal phase emulsion template method;magnetic;immobilization;sulfate wastewater;sulfate reducing bacteria

摘要：化学共沉淀法制备了油酸修饰的Fe_3O_4颗粒,以苯乙烯为连续相,水为分散相,Fe_3O_4颗粒为稳定剂,采用高内相乳液模板法合成了磁性大孔聚合物小球(MPMS),并对MPMS的形貌、疏水性、结构、热稳定性、磁性等进行了表征。将硫酸盐还原菌(SRB)固定于MPMS,以模拟硫酸盐废水,比较了固定化SRB与游离SRB的脱硫性能。结果表明,大孔材料MPMS呈现多级孔道结构,具有丰富的泡孔和窗孔,MPMS的饱和磁化强度为2.043 A·m^2/kg,固定化SRB后的MPMS饱和磁化强度为0.188 A·m^2/kg,聚合物载体在负载后仍保留一定磁性;SRB在MPMS上固定化一周左右,可生成稳定的生物膜,对比固定化SRB和游离SRB的脱硫性能,可得出:固定化SRB生长状态优于游离SRB,当硫酸根浓度为2 000 mg/L时,脱硫速率达到2 597.76 mg/(L·d)。
The oleic acid modified nano-Fe3O4 particles were prepared by chemical co-precipitation method. Using styrene as the continuous phase, water as the dispersed phase and Fe3O4 as the stabilizer, the magnetic macroporous polymer beads(MPMS) were synthesized by high internal phase emulsion template method, and the morphology, hydrophobicity, structure, thermal stability and magnetic properties of MPMS were characterized. Using the simulate sulfate wastewater, the desulfurization performance of immobilized SRB and free SRB was compared with each other. The results show that the macroporous material MPMS exhibited multi-level pore structure with abundant cells and pores. The saturation magnetization of MPMS was 2.043 A·m2/kg, and the saturation magnetization of MPMS after immobilized SRB was 0.188 A·m2/Kg. The polymer carrier retained a certain magnetic property after loading. SRB was immobilized on MPMS for about one week, and a stable biofilm could be formed. Comparing the desulfurization performance of immobilized SRB and free SRB, it can be concluded that the growth state of immobilized SRB was better than that of free SRB. When the sulfate concentration was 2000 mg/L and the desulfurization rate reached 2597.76 mg/(L·d).