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首页> 外文期刊>Applied Surface Science >Kinetics, equilibrium and thermodynamics of the sorption of tetrabromobisphenol A on multiwalled carbon nanotubes
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Kinetics, equilibrium and thermodynamics of the sorption of tetrabromobisphenol A on multiwalled carbon nanotubes

机译：四溴双酚A在多壁碳纳米管上的吸附动力学，平衡和热力学

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摘要

Tetrabromobisphenol A (TBBPA) is widely used as a flame retardant and is relatively persistent in the environment. This study reports the sorption kinetics, equilibrium and thermodynamics of TBBPA on multiwalled carbon nanotubes (MWCNTs). The equilibrium sorption capacity has been significantly improved by increasing the initial TBBPA concentration and contact time. In alkaline conditions and at high temperatures, a large reduction of TBBPA uptake was observed. The equilibrium between TBBPA and MWCNTs was achieved in approximately 60 min with removal of 96% of the TBBPA. The sorption kinetics were well described by a pseudo-second-order rate model, while both Langmuir and Freundlich models described the sorption isotherms well at different temperatures. Thermodynamic parameters suggested that the sorption of TBBPA is exothermic and spontaneous at the temperatures studied.
机译：四溴双酚A（TBBPA）被广泛用作阻燃剂，并且在环境中相对持久。这项研究报告了TBBPA在多壁碳纳米管（MWCNT）上的吸附动力学，平衡和热力学。通过增加初始TBBPA浓度和接触时间，可以显着提高平衡吸附能力。在碱性条件和高温下，观察到TBBPA吸收量大大降低。在大约60分钟内，去除了96％的TBBPA，TBBPA和MWCNT之间达到了平衡。吸附动力学通过拟二级速率模型很好地描述，而Langmuir和Freundlich模型都很好地描述了在不同温度下的吸附等温线。热力学参数表明，在所研究的温度下，TBBPA的吸附是放热的，并且是自发的。

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