黑曲霉发酵菌渣对臧红T的吸附研究

发布时间：2018-01-14 16:26

本文关键词：黑曲霉发酵菌渣对臧红T的吸附研究　出处：《生物技术通报》2017年10期 　论文类型：期刊论文

【摘要】：将糖化酶发酵生产过程中产生的黑曲霉菌渣作为一种复合吸附剂进行了染料吸附研究,以挖掘其吸附潜力。首先对菌渣的理化性质进行了分析,然后以臧红T为模型染料,考察了几种因素(接触时间、溶液温度、吸附剂量、初始浓度和盐离子)对吸附的影响,并将所得数据用等温吸附方程、动力学方程和热力学方程进行了模型拟和。结果表明,吸附可在2 h内达到平衡,吸附过程符合准二级动力学模型,属于化学吸附,膜扩散模型比内扩散模型更适合解释吸附行为;温度对吸附有促进作用,吸附过程是一个自发的吸热反应;通过Langmuir方程可计算出最大单分子层吸附容量为166.67 mg/g,但Freundlich能更好的描述吸附行为,说明菌渣表面存在多个不同的吸附位点。此外,菌渣投加量和钠离子浓度均可影响吸附效果,染料去除率最高可达91%。
[Abstract]:Aspergillus niger glucoamylase will produce fermentation in the production process as a kind of composite adsorbent was studied by dye adsorption, the adsorption potential of mining. First on physicochemical properties of mushroom residue were analyzed, and then the red T dye Zang model, the influences of some factors (contact time, temperature of the solution. Adsorption dosage, initial concentration and salt ion) on the adsorption, and the resulting data with the isothermal adsorption equations, dynamic equations and thermodynamic equations of model fitting. The results showed that the adsorption reached equilibrium within 2 h, the adsorption process accords with the quasi two level dynamic model, which belongs to chemical adsorption, membrane diffusion model more than to explain the adsorption diffusion model; temperature has a promoting effect on the adsorption, the adsorption process is a spontaneous endothermic reaction; the Langmuir equation can calculate the maximum adsorption capacity of 166.67 mg/g, but Freundlich A better description of adsorption behavior indicates that there are many different adsorption sites on the surface of bacteria residue. In addition, the amount of sludge residue and sodium ion can all affect the adsorption effect, and the dye removal rate is up to 91%..

【作者单位】：黄淮学院生物与食品工程学院;河南仰韶生化工程有限公司;南京农业大学资源与环境学院;
【基金】：国家自然科学基金项目(51503074)
【分类号】：O647.3;X703
【正文快照】： 随着人类社会的发展,工业化进程日益加快,环境污染也日趋严重。生命过程离不开水源,水体污染是环境污染中最为值得关注的一个方面,其主要污染物有无机金属离子和有机化合物,如染料分子[1]。染料广泛应用于多个领域,废水排放量非常巨大,且多数染料化学结构复杂、难降解、具有一

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