摘要:用高锰酸钾、氢氧化钾、氢氧化钾+双氧水三种方法改性水稻秸秆,研究了三种改性方法和多菌灵初始浓度对秸秆吸附水中多菌灵的影响,通过测定多菌灵浓度变化和秸秆吸附量,做出吸附等温线和拟合反应动力学方程研究改性秸秆对多菌灵的吸附性能。结果表明:未改性的秸秆对多菌灵吸附效果不明显。不同处理方法的水稻对多菌灵吸附效果不同,其中,KMnO4处理的秸秆吸附性能最好,饱和吸附量为0.833mg/g,KOH和KOH+H2O2处理的秸秆吸附效果相近,饱和吸附量分别为0.587mg/g和0.461mg/g。吸附过程用准二级动力学方程拟合,效果良好,吸附等温线符合Langmuir方程。29799 毕业论文关键词:改性水稻秸秆;多菌灵;吸附
Absorption of carbendazim from water on modified rice straw
Abstract:Three sorts of modified rice straw by using KMnO4, KOH and KOH+H2O2 were used for removal of carbendazim from water. The influences of modification method, initial concentration and adsorption time were investigated on adsorption properties by dynamic tests and concentration measurement. The results showed that the rice straw modified by KMnO4 had maximum adsorption capacity with 0.833mg/g,KOH and KOH+H2O2,with 0.587mg/g and 0.461mg/g respectively,while the original rice straw almost has no adsorption. The adsorption process was fitted well by Langmuir adsorption isotherms and the pseudo second-order kinetics.
Keywords:modified rice straw;carbendazim;adsorption
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