Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaen, 23071 Jaen, Spain.
Faculty of Chemical Sciences, Universidad Autónoma de San Luis de Potosí, 78260 San Luis de Potosí, Mexico.
Sci Total Environ. 2019 Jun 15;669:767-776. doi: 10.1016/j.scitotenv.2019.03.125. Epub 2019 Mar 9.
This study investigated the adsorption of two endocrine-disrupting chemicals, bisphenol A (BPA) and S (BPS), from water using activated carbon clothes (ACCs), as-received and oxidized, in the absence and presence of bacteria, analyzing both kinetic and equilibrium adsorption data. Kinetic study of the different systems showed that the adsorption rate was affected both by the oxidation of the adsorbent and by the presence of bacteria. Bisphenol adsorption kinetics followed a second-order kinetic model, with rate constants between 0.0228 and 0.0013 g min mol. ACC was a much better adsorbent of E. coli compared to granular activated carbons, achieving 100% adsorption at 24 h. ACC oxidation reduced the adsorption capacity and the adsorbent-adsorbate relative affinity due to the decrease in carbon surface hydrophobicity. Conversely, the presence of bacteria in aqueous solution increased the ACC surface hydrophobicity and therefore enhanced the adsorption capacity of BPA and BPS on ACC, which was 33% and 24%, respectively. In all cases, more BPS than BPA was removed due to the greater dipolar moment of the former. Results found show that activated carbon clothes in the presence of bacteria can be an adequate process to remove bisphenol A and S from different aqueous systems.
本研究使用活性炭衣服（ACCs），在不存在和存在细菌的情况下，研究了两种内分泌干扰化学物质双酚 A（BPA）和 S（BPS）从水中的吸附，分析了动力学和平衡吸附数据。对不同体系的动力学研究表明，吸附速率既受到吸附剂氧化的影响，也受到细菌存在的影响。BPA 的吸附动力学符合二级动力学模型，速率常数在 0.0228 到 0.0013 g min mol 之间。与颗粒活性炭相比，ACCs 对大肠杆菌的吸附能力要强得多，在 24 小时内达到 100%的吸附。ACCs 氧化降低了吸附容量和吸附剂-吸附物的相对亲和力，这是由于碳表面疏水性降低。相反，细菌在水溶液中的存在增加了 ACC 的表面疏水性，从而增强了 BPA 和 BPS 在 ACC 上的吸附能力，分别为 33%和 24%。在所有情况下，由于前者的偶极矩更大，因此去除的 BPS 多于 BPA。研究结果表明，在存在细菌的情况下，活性炭衣服可以成为从不同水系统中去除双酚 A 和 S 的合适工艺。
