摘要：心血管药物阿替洛尔（atenolol，ATL），是一种β阻滞剂药物。作为一类重要的药品及个人护肤品（PPCPs），ATL 能对心律失常有较强的防治作用，尤其对高血压和冠心病有较高的疗效, 目前在临床上得到广泛应用。由于ATL的极性、水溶性均很强，并且难以被生物降解，这使得难以利用传统的污水处理方法去除该化合物[1]。目前， ATL的生物毒性已得到普遍证实，水环境中存在的ATL对水生生物、人体、生态系统均存在潜在的威胁。过氧化氢和过渡金属离子配合形成的类芬顿体系逐渐成为一种常用的污水处理方法。研究发现，在该体系中加入多壁碳纳米管能大大提高其催化降解能力。因此，本文以羧基化的多壁碳纳米管(MWCNTs-COOH)作为催化剂载体材料，对 Fe3+/H2O2体系降解ATL的降解动力学、降解机理进行研究。结果表明，羧基化多壁碳纳米管能促进 Fe3+/H2O2体系催化降解ATL，其优化降解条件如下：[MWCNTs-COOH]=6 ppm， [Fe3+] = 0.05 mmol/L，[H2O2] = 1.0 mmol/L，[ATL] = 0.02 mmol/L,，pH 4.0，T=25 °C。在该条件下反应 30分钟，ATL的降解率达到 95%左右。此外，利用异丙醇作为淬灭剂的淬灭实验表明，Fe3+/H2O2/MWCNTs-COOH 体系产生的活性氧物种--羟基自由基（• OH）是催化降解底物ATL的主要物质。30390
毕业论文关键词：ATL；羧基化多壁碳纳米管；类芬顿体系；降解动力学；降解机理
A study on the catalysis degradation of atenolol through Fenton-like process promoted by carboxylic multi-walled carbon nanotubes
Abstract： As an important pharmaceutical and personal care products (PPCPs), βablocker atenolol (atenolol, ATL) is a kind of cardiovascular drugs. It has a curative effect on resisting arrhythmia. It may also be of great use in hypertension and coronary heart disease and has been widely used in clinical medicine. The strongly polar drug ATL has a high water solubility and is difficult to be biodegraded, which makes it difficult to be removed from natural water environment [1]. So far, the biological toxicity of ATL has been generally confirmed, and the residual ATL in natural water environment has been the potential threat to aquatic organisms, human beings, as well as ecological system. It is found that the Fenton-like system, which is constituted by hydrogen peroxide and transition metal ions, has gradually become a frequently-used method to treat wastewater, and through adding multi-walled carbon nanotubes (MWCNTs) in this system, the catalytic degradation ability will be dramatically improved. In this paper, therefore, carboxyl of multi-walled carbon nanotubes (MWCNTs-COOH) was selected as catalyst to study the degradation kinetics and reaction mechanism of Fe3+/H2O2 system in the process of degrading ATL. When [Fe3+] = 0.05 mmol/L, [H2O2] = 1.0 mmol/L, [MWCNTs-COOH] = 2.0 ppm, [ATL] = 0.02 mmol/L, at pH 4.0 and 25 ° C, the ATL removal efficiency was 95% after 30 min Furthermore, the radical quenching experiment using isopropanol as quencher indicates that hydroxyl radical (• OH), which produced by Fe3+/H2O2/MWCNTs-COOH system, is the dominant reactive oxygen species (ROS) responsible for ATL oxidation.
Key words: atenolol (ATL); carboxylic multi-walled carbon nanotubes (MWCNTs-COOH); Fenton-like system; degradation kinetics; degradation mechanism
目录
摘要1
关键词1
Abstract1
Keywords1
1绪论3
1.1阿替洛尔基本性质及环境污染现状3
1.2类芬顿体系4
1.2.1类芬顿体系简介4
1.2.2类芬顿体系在环境中的应用5
1.3碳纳米管6
1.3.1碳纳米管结构及性质7
1.3.2碳纳米管类别及差异7
1.3.3碳纳米管的制备方法8
1.3.4碳纳米管的功能化修饰9
1.3.5碳纳米管的应用9
1.3.6碳纳米管在类芬顿体系的作用10 羧基化多壁碳纳米管促进类芬顿体系催化降解阿替洛尔:http://www.751com.cn/yixue/lunwen_26068.html