[化学]树皮的化学组成分析和螯合重金属离子的性能研究.doc

南京林业大学 本科毕业设计（论文） 题 目：树皮的化学组成分析和螯合重金属离子的性能研究 学 院：轻工科学与工程学院制浆造纸工艺080202126 学生姓名： 周 浩 指导教师： 杨益琴副教授min，此时，原料对Cu2+的吸附量为7.83mg/g，对Cd2+的吸附量为9.63 mg/g ，对Pb2+的吸附量为17.92 mg/g ，螯合温度对螯合反应影响不大。NaClO氧化改性的最佳工艺条件是NaClO用量为5.22%（相对于绝干原料），氧化时间为2h，氧化pH值为9，此时，氧化原料对对Cu2+的吸附量为32.97mg/g，对Cd2+的吸附量为106.72mg/g ，对Pb2+的吸附量为85.31mg/g，氧化温度对原料的螯合性能影响不大。 关键词：杉木树皮 吸附 重金属离子 次氯酸钠 氧化改性 The chemical composition analysis of the bark and properties of chelating heavy metal ions Abstract Fir which is Chinese endemic timber species， has the fast-growing and sexual material excellent characteristicswidely used in construction， furniture， etc Fir bark resource accounts for about 11% of the fir biomass; then development and utilization of the resources has the important practical significance. In this study， through research that fir bark adsorb heavy metal ions(Cu2+，Cd2+and Pb2+)ir bark modified by NaClO adsorb heavy metal ions in the waste， I find the best process conditions of them. The best process conditions that fir bark adsorb heavy metal ions is that the particle size of raw materials is 40~60 mesh; reaction pH value is 5; the reaction time is 10 min. At this time, the adsorption of raw materials for Cu2+ is 7.83 mg/g; the adsorption of raw materials for Cd2+ is 9.63 mg/g; the adsorption of raw materials for Pb2+ is 17.92 mg/g. Chelating temperature has a little influence on Chelating reaction. The best oxidation process conditions of NaClO is that the amount of NaClO is 5.22%(relative to absolutely dry raw materials); the oxidation time is 2h; the oxidation pH value is 9. At this time, the adsorption of oxidation raw materials for Cu2+ is 32.97 mg/g; the adsorption of oxidation raw materials for Cd2+ is 106.72 mg/g; the adsorption of oxidation raw materials for Pb2+ is 85.31 mg/g. Oxidation temperature has a little influence on oxidation reaction. Key Words：Fir bark; Adsorption; Heavy metal ions; Sodium hypochlorite; Oxidative modification 目录 1文献综述 1 1.1树皮应用概述 1 1.1.1树