摘要
以废弃桃核壳为原料,经环氧氯丙烷、乙二胺改性后得到一种新型生物吸附剂改性桃核壳,通过等电点测定、元素含量分析及红外光谱分析对其进行表征,并研究了其对水中刚果红的吸附性能。结果表明,改性桃核壳对水中刚果红具有较好的吸附效果,改性桃核壳投加量、溶液pH值、吸附时间及温度等影响其吸附性能,吸附过程满足准二级动力学方程和Langmuir等温吸附模型,在温度为45℃时,改性桃核壳对刚果红的最大吸附量为20.4082 mg·g^(-1)。
We modified waste peach shell by epichlorohydrin and ethylenediamine to obtain a new biological adsorbent,characterized modified peach shell by isoelectric point determination,element content analysis,and infrared spectrum analysis,and studied the adsorption performance to Congo Red.The results indicate that modified peach shell has good adsorption effect to Congo Red in water.The dosage of modified peach shell,the solution pH value,and the adsorption time and temperature can affect the adsorption performance.The adsorption process fits the pseudo-second order kinetics equation and Langmuir isothermal adsorption model.The maximum adsorption capacity of modified peach shell to Congo Red is 20.4082 mg·g^(-1)at 45℃.
作者
刘侠
温俊峰
薛帆
刘玲娜
LIU Xia;WEN Junfeng;XUE Fan;LIU Lingna(School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,China;Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization,Yulin 719000,China)
出处
《化学与生物工程》
CAS
2021年第5期39-42,45,共5页
Chemistry & Bioengineering
基金
榆林市科技计划项目产学研合作项目(CXY-2020-008-05),陕西省教育厅重点实验室项目(20JS160)。
关键词
桃核壳
吸附
刚果红
环氧氯丙烷
乙二胺
peach shell
adsorption
Congo Red
epichlorohydrin
ethylenediamine
