负载板栗壳色素复合吸附剂制备及其去除水中重金属性能

项目名称： 负载板栗壳色素复合吸附剂制备及其去除水中重金属性能

项目编号： No.51268052

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 姚增玉

作者单位： 西南林业大学

项目金额： 50万元

中文摘要： 我国食品工业每年产生十多万吨废弃板栗壳，其中含有约15%的植物黑色素，这一资源尚未开发利用。重金属污染是亟待解决的环境问题。腐殖酸是一类高效广谱的重金属吸附剂，但生产中腐殖酸主要来自泥炭、褐煤等不可再生资源。黑色素是一类来自生物体内的腐殖质型物质，结构和性质与腐殖酸非常相似。本项目以可再生的黑色素代替不可再生的腐殖酸，借鉴腐殖酸复合吸附剂的制备方法，将板栗壳色素负载于沸石、高岭土、硅胶、活性炭、多壁碳纳米管、磁性纳米Fe3O4上，制得有机-无机复合吸附剂。以恒温振荡批处理法研究其吸附水中Cu(II)、Cd(II)、Pb(II)、Hg(II)、Cr(VI)等重金属离子的性能，优化复合吸附剂的制备工艺以及对重金属的吸附-解吸工艺，并通过吸附平衡、动力学、热力学行为分析，籍以红外光谱、能量色散X射线光谱、X射线光电子能谱、电子显微镜等仪器分析技术剖析其吸附机理。

中文关键词： 板栗壳；黑色素；吸附；重金属；有机-无机复合材料

英文摘要： In China, the food industry generates over 100 kilotons of chestnut shell waste annually. The waste contains ca. 15% by weight of herbal melanin that has not been utilized yet. Heavy metal pollution is an outstanding environmental problem desiderated to be solved. Humic acid is a class of efficient broad-spectrum heavy-metal sorbent, which is mainly produced from non-renewable resources such as peat and lignite. Melanin is humic-type substance in biomass, whose structure and properties are very similar to those of humic acid. In this project, chestnut shell pigments will be used as a substitute for humic acid to prepare organic-inorganic composite sorbents. The chestnut shell pigments will be loaded on natural zeolite, kaolin, silica gel, activated carbon, multi-walled carbon nanotubes, and Fe3O4 magnetic nanoparticles by referring to the methods designed for loading humic acid on these carriers. The performance of the prepared sorbents for sorption of Cu(II), Cd(II), Pb(II), Hg(II) and Cr(VI) from aqueous solutions will be evaluated. The technological processes for the sorbent preparation and sorption-desorption of heavy metals will be optimized. Equilibrium, kinetics and thermodynamics analyses and Fourier transform infrared, energy dispersive X-ray and X-ray photoelectron spectroscopies as well as electron mi

英文关键词： chestnut shell；melanin；sorption；heavy metal；organic–inorganic composite