• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Utilization of MWCNTs/Al_2O_3 as adsorbent for ciprofloxacin removal: equilibrium, kinetics and thermodynamic studies
【24h】

Utilization of MWCNTs/Al_2O_3 as adsorbent for ciprofloxacin removal: equilibrium, kinetics and thermodynamic studies

机译：使用MWCNT / Al_2O_3作为CiProfloxacin去除的吸附剂：平衡，动力学和热力学研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the present study, the adsorption behavior of ciprofloxacin (CIP) from aqueous solution onto MWCNTs/Al2O3 was studied using batch experiments. Physical characterization of MWCNTs/Al2O3 was determined by SEM, XRD, and BET. The effective parameters investigated included: initial CIP concentration, contact time, MWCNTs/Al2O3 mass, and temperature. Based on experimental results and correlation coefficients, the rate of CIP adsorption followed the pseudo-second-model kinetics. Complete compatibility of the adsorption isotherm process was achieved with the Langmuir model, and the maximum adsorption capacity reached 41.73 mg/g under the optimized conditions (pH = 7, MWCNTs/Al2O3 dose = 1.2 g/L, contact time = 60 min, initial concentration = 10 mg/L, and temperature= 45 degrees C). The adsorption capacities based on the Langmuir model at different temperatures, 273, 288, 303, and 318 K, were equal to 72.18, 75.92, 79.65, and 83.47 mg/g, respectively. The determined parameters of the thermodynamic studies demonstrated the endothermic and spontaneous nature of the biosorption. The mean free energy was estimated from D-R isotherm model to be 0.316-0.707 KJ/mol, which clearly proved that the adsorption experiment followed a physical process. The data suggest that MWCNTs/Al2O3 could be used as a highly effective adsorbent material with a high capacity for the removal of antibiotics from water and wastewater.
机译：在本研究中，使用分批实验研究了将CiProfloxacin（CIP）从水溶液中的水溶液的吸附行为进行研究。通过SEM，XRD和BET测定MWCNT / AL2O3的物理表征。所研究的有效参数包括：初始CIP浓度，接触时间，MWCNT / AL2O3质量和温度。基于实验结果和相关系数，CIP吸附速率跟随伪第二模型动力学。通过Langmuir模型实现了吸附等温工艺的完全相容性，并且在优化条件下最大吸附能力达到41.73mg / g（pH = 7，MWCNT / Al2O3剂量= 1.2g / L，接触时间= 60分钟，初始浓度= 10mg / L，温度= 45℃）。基于不同温度，273,288,303和318k的Langmuir模型的吸附容量分别等于72.18,75.92,79.65和83.47mg / g。确定的热力学研究的参数证明了生物吸附的吸热和自发性。从D-R等温线模型估计平均自由能量为0.316-0.707 kJ / mol，这明确证明了吸附实验遵循物理过程。数据表明，MWCNT / AL2O3可用作高效吸附材料，具有高容量，用于从水和废水中除去抗生素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号