热带作物学报2018，Vol.39Issue(2)：361-371,11.DOI:10.3969/j.issn.1000-2561.2018.02.023
木薯渣基生物质炭对阿维菌素吸附解吸行为研究
Adsorption and Desorption Behavior of Avermectin on Biochar Prepared by Cassava Residue
摘要
Abstract
In the study,the adsorption kinetics,isotherm and thermodynamics of avermectin on biochars,which were prepared using cassava residue at 350,550 and 750 ℃ temperature (labeled as MS350,MS550 and MS750,respectively)were investigated.The approach of Fourier transform infrared spectroscopy(FTIR) analysis was used to elucidate the possible adsorption mechanism.The results showed that the biochar had lower yield and polarity with the increase of preparation temperature,but the pH value,ash,specific surface area and aromaticity increased accordingly.The results of adsorption kinetics demonstrated that the avermectin was rapidly absorbed by biochar in the right beginning of absorption process,and then increased slowly until achieving the plateau of adsorption equilibrium.The adsorption isotherms showed that the adsorption capacity:MS750＞MS550＞MS350 and all the adsorption isotherm of avermectin on biochar met the nonlinear L type.Desorption isotherm results showed that there was desorption hysteresis in the adsorption of avermectin by cassava residue based biochar.The adsorption thermodynamics showed that the adsorption capacity of biochar could be improved by increasing temperature.Besides,the results of Gibbs free energy indicated that the physical adsorption played a main role in the adsorption of abamectin on biochar,and it was an endothermic,entropy increasing spontaneous reaction.The pore-filling mechanism,π-π bonding interactions,electrostatic interaction and hydrogen bonding on biochar might be the main contributors to adsorption abamectin.关键词
生物质炭/阿维菌素/热解温度/吸附/解吸Key words
biochar/avermectin/heat treatment temperatures/adsorption/desorption分类
农业科技引用本文复制引用
黄鹏,岳林,俞花美,罗吉伟,葛成军..木薯渣基生物质炭对阿维菌素吸附解吸行为研究[J].热带作物学报,2018,39(2):361-371,11.基金项目
基金项目国家自然科学基金(No.21467008) （No.21467008）
国家自然科学基金(No.21367011) （No.21367011）
海南省重大科技计划项目(No.ZDKJ2017002) （No.ZDKJ2017002）
中央级公益性科研院所基本科研业务费专项资金(No.2017hzslJ023). （No.2017hzslJ023）
