罗耳阿太菌多糖对Cu^2+和Cd^2+的吸附工艺优化及表征  

Optimization of Adsorption Process and Characterization of Cu 2+and Cd 2+by Athelia rolfsii Polysaccharide

作　　者：刘玉琪 李鸿梅[1] 范春婷 闵伟红[1] 高雅文[1] LIU Yu-qi;LI Hong-mei;FAN Chun-ting;MIN Wei-hong;GAO Ya-wen(College of Food Science and Engineering,Jilin Agricultural University,Changchun 130118,China)

机构地区：[1]吉林农业大学食品科学与工程学院,吉林长春130118

出　　处：《食品工业科技》2020年第23期175-181,共7页Science and Technology of Food Industry

摘　　要：以罗耳阿太菌多糖(Athelia rolfsii polysaccharide,AEPS)为生物吸附剂,探究其对水中铜(Cu^2+)和镉(Cd^2+)重金属离子的吸附。在单因素实验的基础上,采用正交试验优化AEPS吸附Cu^2+和Cd^2+效果,通过扫描电子显微镜(SEM)、X射线能谱仪(EDS)和傅里叶红外光谱仪(FTIR)对AEPS吸附重金属离子前后的表面形貌进行表征和分析,初步揭示了AEPS吸附Cu^2+和Cd^(2+)机理。结果表明,Cu^2+吸附效果最优条件为:pH4.5,AEPS浓度1.5 g/L,吸附温度40℃,吸附时间45 min时,Cu^2+吸附率为88.27%;Cd^2+吸附效果最优条件为:pH6.5,多糖浓度1.5 g/L,吸附温度45℃,吸附时间60 min时,Cd^2+吸附率为77.81%。SEM、EDS和FTIR结果表明,AEPS中的O-H、C-H、C-O和CCO官能团参与吸附反应,吸附Cu^2+和Cd^2+的AEPS的表面结构也发生明显变化,试验结果表明AEPS对Cu^2+和Cd^2+有良好的吸附作用。To explore the adsorption on copper and cadmium heavy metal ions in water by using Athelia rolfsii polysaccharide as a biosorbent.On the basis of single factor experiments,the orthogonal experiment was used to optimize the adsorption effect of Cu^2+and Cd^2+by AEPS.The surface topography of polysaccharides before and after adsorption of heavy metal ions were characterized and analyzed by scanning electron microscope(SEM),X-ray energy dispersive spectrometer(EDS)and Fourier transform infrared spectroscopy(FTIR),and the adsorption mechanism of AEPS on Cu^2+and Cd^2+were initially revealed.The results of the optimal conditions for Cu^2+adsorption were pH4.5,AEPS concentration 1.5 g/L,adsorption temperature 40℃,and adsorption time 45 min,the Cu^2+adsorption rate was 88.27%.The optimal conditions for Cd^2+adsorption were pH6.5,polysaccharide concentration 1.5 g/L,adsorption temperature 45℃,and adsorption time 60 min,the Cd^2+adsorption rate was 77.81%.The results of SEM,EDS and FTIR indicated that the O-H,C-H,C-O and CCO functional groups in AEPS were involved in the adsorption reaction,and the surface structure of AEPS adsorbing Cu^2+and Cd^2+also changed significantly.The results showed that AEPS had a good adsorption effect on Cu^2+and Cd^2+.

关 键 词：罗耳阿太菌多糖 重金属离子 CU^2+ CD^2+ 吸附 工艺优化 表征 

分 类 号：TS201.1[轻工技术与工程—食品科学]