摘要
以葡萄籽提取液合成纳米铁粒子,将其与过氧化氢(H_2O_2)联用类芬顿法降解水中的酸性大红(AR)。考察了H_2O_2加入量、AR初始浓度、温度和pH对降解效果的影响。结果表明,AR降解率随AR初始浓度的降低,温度的升高,pH的降低而提高;在5～30 m L内,H_2O_2(10%)加入量20 m L时AR降解率最高。在pH值3～9,经反应180 min后,AR的降解率均可达到90%以上,说明pH值对AR降解的影响不显著。分别采用伪一级、伪二级、层间扩散模型对酸性大红降解的动力学行为进行描述,结果显示伪二级模型(R2=0. 998)对实验数据的拟合度最好,活化能为23. 7 k J/mol。
Green nanoscale iron particles were synthesized by using grape seed extract,and combined with H 2O 2 to degrade acid red(AR)by Fenton-like method from aqueous solution.The effects of H 2O 2 addition,initial concentration of AR,temperature and pH were investigated.The results showed that the AR degradation rate increased with the decrease of initial concentration of AR,the rise of temperature and the decrease of pH in the range of the research.The AR got the highest degradation rate with 20 mL H 2O 2(10%)in the range of 5~30 mL.The degradation rate could reach more than 90%for 180 min in the pH range of 3~9,indicating that the effect of pH on AR degradation was insignificant.Pseudo-first-order kinetic model,pseudo-second-order kinetic model and intra-particular diffusion model were used to describe the kinetic behavior.The results showed that the second order kinetic model(R 2=0.998)had the best agreement with the experimental data,the activation energy is 23.7 kJ/mol.
作者
李美玲
李赛
田瑜
李霞
郭波
LI Mei-ling;LI Sai;TIAN Yu;LI Xia;GUO Bo(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第10期2103-2106,共4页
Applied Chemical Industry
基金
国家自然科学基金(U1610105)
山西省国际科技合作项目(2014081007-1)
山西省自然科学基金(201601D102037)
关键词
绿色合成
纳米铁
类芬顿法
酸性大红
green synthesis
nanoscale iron particles
Fenton-like
acid red
作者简介
李美玲(1991-),女,山西孝义人,太原理工大学在读硕士,师从郭波副教授,研究方向为污染物的纳米催化工艺。电话:18234133180,E-mail:2236992323@qq.com;通讯联系人:郭波(1968-),女,山西太原人,副教授,博士,研究方向为污染物的纳米催化工艺。电话:13753149491,E-mail:guobo@tyut.edu.cn。
