牛粪蚓粪及其生物炭对Zn的吸附特性的差异研究
Abstract: The paper with cow dung,vermicompost as raw material and in the muffle furnace under 350℃ and 700℃ fire the biochar.Through of cow dung,vermicompost and biochar isothermal adsorption desorption characteristics of Zn2+ ,the backgroung of the differences pH solution for biochar Zinc adsorption,adsorption kinetic,adsorption mechanism of experimental measured with atomic absorption spectrophotometer Zn2+ adsorption desorption quantitly.Isothermal curve by Herry,Langmuir and Freundlichd isothermal equation to analyze the fitting result,research and for economic and effective removal of heavy metal ion in water.The results showed that Zn2+ adsorption was increased with the increasing intial concentration within the range of Zn2+ concentrtions used in the experiment,and vericompost had a much higher Zn2+ adsorption capacity than cow dung.The adsorption isotherm of Zn2+ by the absorbent could signifcantly conform to Landmuir equtions.Cow dung,vermicompost and biochar of Zn2+ desorption rate increases with the adsorption rate of decline.Cow dung is easier for Zn2+ to release from vermicompost.The Zn2+adsorption rate of cow dung,vermicompost and biochar are faster,can quickly respond within 30 minutes.With adsorption time elongating,Zn2+ adsorption by is relatively flat.Cow dung,vermicompost and biochar of Zn2+ could be fitted by the puasi-second order equation.With the increase of pH,adsorption increase gradually.When pH=7,the adsorption quantity of biochar is the largest strongest.
毕业论文关键词： 牛粪；蚓粪；吸附；解吸；动力学；Zn
Keyword: cow dung；vermicompost；adsorption；desorption；dynamics；Zn
目 录
摘要•2
Abstract•2
引言•4
1.材料与方法5
1.1供试材料5
1.2研究方法5
1.2.1溶液的制备方法5
1.2.2吸附特性研究5
1.2.3计算方法6
2.结果与分析 • 6
2.1牛粪、蚓粪及其生物炭对Zn2+的吸附特性6•
2.1.1牛粪及其生物炭对Zn2+的吸附特性6
2.1.2蚓粪及其生物炭对Zn2+的吸附特性7
2.2牛粪、蚓粪及其生物炭对Zn2+的解吸特性8
2.2.1牛粪及其生物炭对Zn2+的解吸特性8
2.2.1蚓粪及其生物炭对Zn2+的解吸特性9
2.3不同振荡时间下，牛粪蚓粪及其生物炭对Zn2+的吸附动力学9
2.3.1牛粪及其生物炭对Zn2+的吸附动力学9
2.3.2蚓粪及其生物炭对Zn2+的吸附动力学9