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首页> 外文期刊>Polish Journal of Environmental Studies >Comparing Sorption Characteristics of Tetrabromobisphenol-A, Bisphenol-A, and 2,6-Dibromophenol in a Single-Aolute Aystem
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Comparing Sorption Characteristics of Tetrabromobisphenol-A, Bisphenol-A, and 2,6-Dibromophenol in a Single-Aolute Aystem

机译：比较四溴双酚A，双酚A和2,6-二溴苯酚在单溶液系统中的吸附特性

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摘要

Tetrabromobisphenol-A (TBBPA) and its analogue compounds (bisphenol-A (BPA) and 2, 6-dibromophenol (2, 6-DBP)) sorption on CTMAB-clays was investigated in this paper through bath experiments. Montmorillonite and kaolinite modified by CTAMB, as the adsorbent, were firstly characterized by XRD, FTIR and SEManalysis. The surface areas was determined using N2 (77K) sorption-desorption analysis. Kinetic studies showed that sorption reached equilibrium in 5 hours and followed the pseudo second order kinetic model. The intra-particle diffusion model for sorption was also investigated and compared to identify the sorption mechanism. The sorption isotherms, well fitted by Freundlich model, were changed from being non-linear to being linear with intercalating CTMAB into clays, which indicated that CTMAB increased the partition interaction. A combination of partition and specific sorption might be contributed to TBBPA and its composition products sorption mechanism. The Freundlich coefficients (kF) and distribution coefficients (kd) for both two adsorbents were primarily increased by increasing amount of adsorbed CTMAB, while the organic carbon normalized sorption coefficients (koc) did not follow this trend. Meanwhile, 100%CEC-CTMAB-Montmorillonite showed an advantage of removal of the selected compounds than 100%CEC-CTAM13-Kaolinite. The sorption capacity of BPA was bigger than that of 2, 6-DBP in spite of their similar hydrophobicity, which indicated some molecule properties might influence the sorption on CTMAB-clays. Moreover, the negative AGO and AHO indicated the spontaneous and exothermal process. The TBBPA sorption on CTMAB-clays was considerably enhanced in the acid condition.
机译：通过浴实验研究了四溴双酚-A（TBBPA）及其类似化合物（双酚-A（BPA）和2，6-二溴苯酚（2，6-DBP））在CTMAB粘土上的吸附。首先通过XRD，FTIR和SEM分析对以CTAMB为改性剂的蒙脱土和高岭土进行了表征。使用N 2（77K）吸附-脱附分析确定表面积。动力学研究表明，吸附在5小时内达到平衡，并遵循伪二级动力学模型。还研究了颗粒内吸附模型，并进行了比较，以确定吸附机理。吸附等温线由Freundlich模型很好地拟合，通过将CTMAB嵌入粘土中而从非线性变为线性，这表明CTMAB增加了分配相互作用。分配和特异性吸附的结合可能有助于TBBPA及其组成产物的吸附机理。两种吸附剂的Freundlich系数（kF）和分布系数（kd）主要是通过增加CTMAB的吸附量而增加的，而有机碳归一化吸附系数（koc）并不遵循这种趋势。同时，与100％CEC-CTAM13-高岭石相比，100％CEC-CTMAB-蒙脱石显示出去除所选化合物的优势。尽管它们具有相似的疏水性，但BPA的吸附能力却比2、6-DBP大，这表明某些分子性质可能会影响CTMAB粘土的吸附。此外，阴性的AGO和AHO表示自发和放热过程。在酸性条件下，TBPAA在CTMAB粘土上的吸附作用大大增强。

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