木聚糖基水凝胶对Cu^(2+)吸附性能的研究  

Study on Adsorption Properties of Xylan-Based Hydrogels for Cu^(2+)

作　　者：梁志[1,2] 胡鑫鑫 LIANG Zhi;HU Xin-xin(Department of Chemical Engineering,Maoming Vocational and Technical College,Maoming 525028,China;Guangdong Fine Chemicals(West Guangdong)Engineering Technology Research Center,Maoming 525028,China)

机构地区：[1]茂名职业技术学院化学工程系,广东茂名525028 [2]广东省精细化学品(粤西)工程技术研究中心,广东茂名525028

出　　处：《塑料科技》2024年第1期54-58,共5页Plastics Science and Technology

基　　金：2020年广东省科技专项资金(“大专项+任务清单”)项目(2020S00062)。

摘　　要：以木聚糖为原料,以丙烯酸、N-异丙基丙烯酰胺为功能单体,N,N’-亚甲基双丙烯酰胺为交联剂,在光引发剂安息香二甲醚紫外引发下,通过接枝聚合,制备水凝胶吸附剂。利用傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)分析水凝胶吸附剂的结构,并研究pH值、吸附剂用量、金属离子初始质量浓度、吸附时间对Cu^(2+)吸附性能的影响。结果表明:Cu^(2+)吸附量随Cu^(2+)溶液pH值的增大而增大。当Cu^(2+)浓度为300 mg/L,pH值为5.0时,对Cu^(2+)的最大吸附容量为290 mg/g,吸附率达92%。水凝胶对Cu^(2+)的吸附为离子交换机制,吸附行为符合动力学假二级模型。Using xylan as the raw material,acrylic acid,N-isopropylacrylamide as functional monomers,and N,N'-methylenebisacrylamide as a crosslinking agent,hydrogel adsorbents were prepared through graft polymerization under ultraviolet initiation with photoinitiator benzoin dimethyl ether.The structure of the hydrogel adsorbent was analyzed using Fourier-transform infrared spectroscopy(FTIR) and scanning electron microscopy(SEM).The effects of pH value,adsorbent dosage,initial mass concentration of metal ions,and adsorption time on the adsorption performance of Cu^(2+) were studied.The results show that the adsorption capacity of Cu^(2+) increases with the increase of the pH of the Cu^(2+) solution.When the Cu^(2+) concentration is 300 mg/L and the pH value is 5.0,the maximum adsorption capacity for Cu^(2+) is 290 mg/g,with an adsorption rate of 92%.The adsorption of Cu^(2+) by the hydrogel follows an ion exchange mechanism,and the adsorption behavior conforms to the pseudo-second-order kinetic model.

关 键 词：水凝胶 N-异丙基丙烯酰胺 丙烯酸 铜离子 生物质吸附剂 

分 类 号：X703[环境科学与工程—环境工程] TB332[一般工业技术—材料科学与工程]