丁二酸改性酵母菌对水中Ni(Ⅱ)的吸附研究  

Study on the Adsorption of Ni(Ⅱ)in Water by Succinic Acid Modified Yeast

作　　者：冯子仪 张丽芳[1] FENG Ziyi;ZHANG Lifang(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2023年第4期62-68,74,共8页Journal of Shenyang Ligong University

基　　金：辽宁省教育厅高等学校基本科研项目(面上重点项目)(LJKZ0235)。

摘　　要：为提高酵母菌对Ni(Ⅱ)的吸附性能,采用丁二酸对其进行酯化改性,将酯羰基引至酵母菌表面,制备丁二酸改性酵母菌吸附剂,利用扫描电子显微镜(SEM)和傅里叶变换红外光谱仪(FTIR)对改性酵母菌进行表征,研究改性酵母菌对水中Ni(Ⅱ)的吸附性能,考察丁二酸投加量、戊二醛用量、溶液pH及吸附时间等因素对Ni(Ⅱ)去除效果的影响。结果表明:酯羰基被成功引至酵母菌表面,改性酵母菌表面粗糙不平;当丁二酸用量为6 g/g、戊二醛用量为6 mL/g时,制备的改性酵母菌对Ni(Ⅱ)的去除效果较好;当溶液pH为7、吸附剂用量为1 g/L、吸附时间为150 min时,丁二酸改性酵母菌对Ni(Ⅱ)的去除率为67.05%;Langmuir模型可以更好地描述改性酵母菌的吸附行为,改性酵母菌对Ni(Ⅱ)的吸附为自发吸热过程。In order to improve the adsorption performance of yeast for Ni(Ⅱ),succinic acid modified yeast is prepared by esterification.The modified yeast is characterized by scanning electron microscopy(SEM)and Fourier transform infrared spectroscopy(FTIR),and the adsorption performance of modified yeast biomass for Ni(Ⅱ)from aqueous solution water is studied.The effects of succinic acid dosage,glutaraldehyde dosage,solution pH and adsorption time on Ni(Ⅱ)removal is investigated.The results show that ester carbonyls are successfully introduced to the surface of yeast;and the modified yeast cells exhibit rough and uneven surface structure;the modified yeast has better Ni(Ⅱ)removal efficiency at succinic acid dosage of 6 g/g and glutaraldehyde dosage 6 mL/g during the esterification process;when solution pH,the amount of adsorbent and adsorption time are 7,1 g/L,and the 150 min,respectively,the removal rate of Ni(Ⅱ)by succinic acid modified yeast is 67.05%;Langmuir isothermal model can better describe the Ni(Ⅱ)adsorption on modified yeast,the adsorption of Ni(Ⅱ)by modified yeast is a spontaneous endothermic process.

关 键 词：酵母菌 丁二酸 改性 NI(II) 吸附 

分 类 号：TQ424[化学工程]