Fast and efficient adsorption of bisphenols pollutants from water by using Hydroxypropyl-β-cyclodextrin polymer
Fast and efficient adsorption of bisphenols pollutants from water by using Hydroxypropyl-β-cyclodextrin polymer
复制标题
使用羟丙基-β-环糊精聚合物快速高效地吸附水中的双酚类污染物
DOI：
10.1016/j.reactfunctpolym.2020.104678
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发表时间：
2020-09-01
影响因子：
5.1
通讯作者：
Tang, Kewen
中科院分区：
文献类型：
--
作者：
Cai, Jianzhe;Zhang, Panliang;Tang, Kewen
水系统中双酚类物质的存在对环境和公众健康具有潜在的危险。本研究以四氟对苯二甲酸乙二腈为交联剂制备了羟丙基- β -环糊精多孔聚合物（hp - β - cd），并应用于水中双酚类物质（BPA、BPS和BPF）的去除。分别考察了吸附时间、吸附剂用量、双酚类初始浓度和温度对hp - β - cd聚合物吸附效率的影响因素。hp - β - cd聚合物对双酚类化合物具有快速吸附动力学，对BPA的吸附在第1分钟内达到95%的平衡吸收率，对BPS和BPF的吸附在10分钟内达到90%的平衡吸收率。动力学数据与拟二级动力学模型拟合良好。Freundlich吸附模型很好地描述了hp - β - cd聚合物对双酚类物质的吸附等温线，表明双酚类物质在吸附剂上具有非均相活性位点。此外，hp - β - cd聚合物可以通过简单的洗涤过程轻松回收，而不会改变性能。在一定流速下，对双酚类物质的吸附率仍然可以达到100%，也证明了其对双酚类物质的快速吸附能力。总之，hp - β - cd聚合物具有吸附动力学快、易于再生、可重复使用等优点，对三种双酚类化合物具有较好的去除效果。
The presence of bisphenols in water systems is potentially dangerous on the environment and public health. In this study, a multiaperture polymer of hydroxypropyl-beta-cyclodextnn (HP-beta-CD) was prepared with tetrafluoroterephthalonitrile as crosslinker, and was applied to remove bisphenols (BPA, BPS and BPF) from water. Influence factors affecting the adsorption efficiency of the HP-beta-CD polymer were investigated separately, including adsorption time, adsorbent doses, initial concentration of bisphenols and temperature. HP-beta-CD polymer presents fast adsorption kinetics toward bisphenols, attaining 95% of adsorption equilibrium uptake for BPA within the first min and 90% of equilibrium uptake for BPS and BPF in 10 min. The kinetics data fitted well with pseudo-second-order kinetics model. The adsorption isotherms of HP-beta-CD polymer toward bisphenols are well described by Freundlich adsorption model, suggesting heterogeneous active sites for bisphenols on the adsorbent. In addition, the HP-beta-CD polymer can be easily recycled through a simple washing process with no change in performance. The adsorption ratio of bisphenols can still achieve 100% within a certain flow rate in flow-through experiments, also proving its fast adsorption ability toward bisphenols. In a word, HP-beta-CD polymer exhibits effective performance in the removal of the three bisphenols with fast adsorption kinetics, easy regeneration, and excellent reusability.