• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Holistic Approach to Environment >STUDY OF CHROMIUM (VI) ADSORPTION USING PTEROSPERMUMACERIFOLIUM FRUIT CAPSULE ACTIVATED CARBON (FCAC) AND COMMERCIAL ACTIVATED CHARCOAL (CAC) AS A SELECTIVE ADSORBENTS
【24h】

STUDY OF CHROMIUM (VI) ADSORPTION USING PTEROSPERMUMACERIFOLIUM FRUIT CAPSULE ACTIVATED CARBON (FCAC) AND COMMERCIAL ACTIVATED CHARCOAL (CAC) AS A SELECTIVE ADSORBENTS

机译：蕨类高果糖活性炭（FCAC）和商业活性炭（CAC）作为选择性吸附剂吸附铬（VI）的研究

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the present study, fruit capsule activated carbon (FCAC) of P-acerifolium and commercial grade activated charcoal (CAC) were used for the study of adsorption of chromium (Vl) from aqueous solution. The maximum adsorption took place in the pH range of 3-6 with in contact time of 180 minutes. The adsorption kinetic of chromium (Vl) analyzed by pseudo first-order and pseudo second-order kinetics models. The kinetics of chromium (Vl) uptake was best described by pseudo-second order rate model (regression coefficients, R2>0.99) with equilibrium rate constant values of 2.70 and 1.42 g/mg.min. for FCAC and CAC adsorbents. Intraparticle diffusion studies showed that the intraparticle transport is not only the rate-limiting step for the mechanism of chromium (Vl) adsorption. The experimental results presented indicated that the adsorption data fitted better with the Langmuir isotherm equation with regression coefficient R2 > 0.99 for both the adsorbents. The maximum monolayer adsorption capacity of FCAC and CAC found to be 76.92 and 71.42 mg/g at initial pH 3.0. Thermodynamic parameters showed that adsorption process was spontaneous and endothermic. A comparative study of FCAC with commercial activated charcoal (CAC) showed that the adsorption capacity of indigenously prepared FCAC adsorbent was much better.
机译：在本研究中，P-醋栗的果囊活性炭（FCAC）和商业级活性炭（CAC）用于研究水溶液中铬（VI）的吸附。最大吸附发生在pH值为3-6的条件下，接触时间为180分钟。通过伪一级和伪二级动力学模型分析了铬（VI）的吸附动力学。铬（VI）吸收的动力学最好用伪二级速率模型（回归系数，R2> 0.99）描述，平衡速率常数值为2.70和1.42 g / mg.min。用于FCAC和CAC吸附剂。颗粒内扩散研究表明，颗粒内运输不仅是铬（VI）吸附机理的限速步骤。实验结果表明，两种吸附剂的吸附数据均符合Langmuir等温方程，回归系数R2> 0.99。在初始pH 3.0时，FCAC和CAC的最大单层吸附容量为76.92和71.42 mg / g。热力学参数表明吸附过程是自发的和吸热的。与商用活性炭（CAC）进行FCAC的比较研究表明，本地制备的FCAC吸附剂的吸附能力要好得多。

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