摘要
采用平衡吸附实验,研究了诺氟沙星在自制焙烧态镁铝水滑石(Mg/Al-NO_3 LDH)上的吸附热力学和动力学行为。结果表明,在固液比1∶500、p H=5.0、吸附温度25℃、离子强度0.1 mol/L的条件下,吸附1 h对诺氟沙星(20 mg/L)的吸附过程符合Langmuir等温线方程和准二级动力学,理论平衡吸附量达到32.05 mg/g。其热力学参数ΔG<0 KJ/mol,ΔH<0 KJ/mol,由此推断焙烧态镁铝水滑石对诺氟沙星的吸附是自发放热反应。
A series of batch adsorption experiments were conducted to study the norfloxacin in hydrotalcite on the adsorption thermodynamics and kinetics. And it showed that the adsorption rate of norfloxacin （20 mg/L） was 91.25% in solid-liquid ratio 1：500, pH=4.0, adsorption temperature was 25 degrees centigrade, the ionic strength of KNO3 0.1 mol/L. Thermodynamic and kinetic experiments showed that the adsorption process correspond with Langmuir isotherm equation and quasi two level dynamics theory under the condition. Equilibrium adsorption amount of 32.05 mg/g, it was close to the actual saturation adsorption capacity of 28.62 mg/g, and the thermodynamic parameters of △G〈0, △H〈0, △G〈0. Therefore it was concluded that the adsorption was a spontaneous heating reaction.
出处
《广州化学》
CAS
2017年第2期37-42,共6页
Guangzhou Chemistry
作者简介
谭倩（1990～），女，湖南人，硕士研究生；主要从事无机材料的研究。
通讯作者：陈文（1965～），女，博士，教授；主要从事无机（复合）材料的制备及应用及环境分析化学等研究。chenwen2010@foxmail．com
