环氧化米糠的吸附研究.doc

环氧化米糠对废水中铬离子的吸附 摘 要：重金属是对生态环境危害极大的一类污染物质，传统的一些处理方法有化学沉淀法、离子交换法、电解法等，在处理重金属废水时，不同程度地存在操作繁琐、并且运行成本高、很容易造成二次污染等缺点。所以近年来，生物吸附法以其高效，与环境友好的优势而引起广大研究者的高度关注.同时,生物吸附研究主要是集中在重金属阳离子的去除，但是实际上废水中也有许多剧毒金属以阴离子的形式存在所以对阴离子生物吸附的研究具有重要的现实意义，本论文主要研究了环氧化米糠吸附剂对 Cr离子的吸附的重要的一些性质。 含铬废水来源十分的广泛，毒性也是比较大，严重的危害了人类的健康，米糠来源十分的简单，并对其进行改造成环氧化米糠，实验主要研究了讨论温度、初始的浓度、吸附的时间、米糠吸附剂用量、PH值等对水溶液中铬离子的吸附效果的影响，通过不同的比较得出准确的结果。采用紫外分光光度法测量其溶液的吸光度而研究变化，结果表明，环氧化米糠对铬存在较大的吸附力度，吸附率达到85%以上，其中最佳的浓度为10Mg/L、PH最佳值为6.0、吸附时间最佳为180min，最佳温度为35Oc,吸附效果最好。随铬离子初始浓度的增加而降低，随温度的升高而升高，随吸附剂用量的增大而升高，初始该方法对铬离子的吸附有巨大的利用价值。 关键词：环氧化米糠 吸附 铬离子 紫外分光光度法 Epoxidation of rice bran on adsorption of chromium ion probe Bailong,Zhouyan* Mianyang Normal University, 621000, China *Email:632099508@ Abstract：Heavy metal is a kind of pollution harm to ecological environment, some traditional methods include chemical precipitation, ion exchange method, electrolysis, in heavy metal wastewater treatment, there are different degrees of complicated operation, and operation cost is high, it is easy to cause two pollution. So in recent years, biological adsorption method is very efficient, and environmentally friendly advantages and causes the attention of many researchers. At the same time, adsorption and biological research is mainly focused on the removal of heavy metal cations, but in fact there are many toxic metals in waste water to form anion existence so research of anion adsorption has practical significance importantly, some important properties of this paper mainly studies the epoxidation of rice bran adsorption of Cr ions. The sources of wastewater containing chromium is very broad, toxicity is relatively large, serious harm to human health, rice bran source is very simple, and its transformation into the epoxidation of rice bran, experimental research discussed temperature, initial concentration, adsorption time, adsorbent dosage, pH value of rice bran in aqueous solution of chromium ion the adsorption effect, obtained by