摘要
以坚果壳为原料,经粉碎制成不同粒径的粉末吸附剂。探究了坚果壳吸附亚甲基蓝、罗丹明B、碱性品红的性能。研究发现坚果壳吸附亚甲基蓝、罗丹明B、碱性品红最佳粒径为0.3 mm、最佳投加量分别为1.6、2.4、1.2 g,pH均为5、温度为30℃、震荡时间为30、60、60 min。利用准一级、准二级动力学方程模拟坚果壳吸附亚甲基蓝、罗丹明B和碱性品红的动力学过程,结果表明坚果壳吸附亚甲基蓝、罗丹明B和碱性品红的过程适合于准二级动力,学模型。文中计算了焓变(ΔH^0)、自由能(ΔG^0)、熵变(ΔS^0)等热力学参数,坚果壳吸附3种阳离子染料过程中ΔG^0均小于0,ΔS^0、ΔH^0均大于0,说明坚果壳吸附3种阳离子染料的过程是一个自发的趋于无序的吸热过程。
The powder of macadamia nut shell at different particle sizes was prepared as the adsorbent.The adsorption properties of macadamia nut shell powder for methylene blue,rhodamine B and basic fuchsine were studied at different conditions.The optimal adsorption conditions were as follows:the dosage of macadamia nut shell powder at 1.6,2.4 and 1.2 g,pH value at 5,particle size at 0.3 mm,adsorption time at 30,60,60 min and temperature at 30℃.The pseudo-first-order,pseudo-second-order were used to simulate the kinetic process of it.The pseudo-second kinetic equation was more suitable for describing the process of it.The thermodynamic parameters of Gibbs free energy(ΔG^0),enthalpy(ΔH^0)and entropy change(ΔS^0)were calculated.In the process of macadamia nut shell powder adsorption of methylene blue,rhodamine B and basic fuchsine,the value ofΔG0^,ΔS^0,andΔH^0 wasΔG^0<0,ΔH^0>0 andΔS^0>0,indi-cating that it was a spontaneous,disorderly and endothermic process.
作者
杨新周
郝志云
田先娇
马艳粉
YANG Xinzhou;HAO Zhiyun;TIAN Xianjiao;MA Yanfen(Institute of Science and Technology,Dehong Teachers College,Dehong,Yunnan 678400,China;Research Institute of Ethnic Minority Medicine,Dehong Teachers College,Dehong,Yunnan 678400,China;Institute of Agriculture and Biological Science,Dehong Teachers College,Dehong,Yunnan 678400,China)
出处
《热带作物学报》
CSCD
北大核心
2019年第7期1387-1392,共6页
Chinese Journal of Tropical Crops
基金
云南省基础研究计划青年项目(No.2018FD099)
德宏师范高等专科学校优秀中青年教师学术带头人培养项目(2016-2018)
关键词
澳洲坚果壳
亚甲基蓝
碱性品红
罗丹明B
吸附
Macadamia nut shell(Macadamia ternifolia F.Muell.)
methylene blue
basic fuchsine
rhodamine B
adsorption
