共存离子对粘质沙雷氏菌吸附钇的影响

Influence of Co-existing Ions on the Adsorping of Yttrium Ions by SerratiaMarcescens

本研究以粘质沙雷氏菌为吸附剂,以水溶液中的钇离子对吸附对象,研究了钇溶液中存在铝、铁、锌和镁离子对粘质沙雷氏菌吸附钇的影响。结果表明,铝离子严重抑制粘质沙雷氏菌对钇的吸附,铁、锌和镁离子对吸附的抑制较弱,多种离子共存对粘质沙雷氏菌吸附钇的抑制程度依次为:锌+铁+铝>铝+铁>锌+铁>锌+铝。共存离子对粘质沙雷氏菌吸附钇都有抑制作用,这可能是由于它们和钇离子竞争吸附在粘质沙雷氏菌表面吸附,吸附的抑制程度不同应该是因为粘质沙雷氏菌吸附这些共存离子的活性基团不同。红外光谱分析结果证实了粘质沙雷氏菌的羧基、氨基和羟基是吸附铁、镁和锌离子的主要官能团,而羧基和羟基是吸附铝离子的主要官能团。

The influence of co-existing of aluminum,iron,zinc and magnesium ions on the adsorption of yttrium ions by Serratia marcescens was studied in the study.The results showed that aluminum ions seriously inhibited the adsorption of yttrium,while the inhibited of iron,zinc and magnesium ions on the adsorption of yttrium are slightly weak.The inhibited order of the multiple ions coexisted as follows:zinc+iron+aluminum>aluminum+iron>zinc+iron>zinc+aluminum.The co-existing of these ions all has inhibition on the adsorption of yttrium should due to there are competing adsorption of the co-existing ions with yttrium on the surface of Serratia marcescens,and the different inhibition degree should because the adsorption groups of Serratia marcescens for the co-existing ions.Fourier transform infrared spectroscopy confirmed that the carboxyl,amino and hydroxyl groups on the surface of Serratia marcescens are the mainly active groups for adsorption iron,zinc and aluminum ions,while carboxyl and hydroxyl groups mainly responsible for the adsorption of magnesium ions.