4,4′-(Propane-2,2-diyl)diphenol (4,4′-PDOL) as a common endocrine-disrupting is widely used in production and life. In this study, a covalent triazine-based framework (CTF) was synthesized, and its adsorption performance for 4,4′-PDOL from aqueous solution was evaluated by batch adsorption experiments. Characterization results demonstrated that CTF had an ordered microporous structure, the Brunauer–Emmett–Teller (BET) surface area is 782.4 m²·g^–1, and the pore volume is 0.40 cm³·g^–1. The batch adsorption experiment indicated that 4,4′-PDOL adsorption kinetics on CTF followed by pseudo-second-order kinetics and the adsorption isotherm could be well-described by the Freundlich adsorption model. 4,4′-PDOL exhibited a strong adsorption affinity because of several specific nonhydrophobic mechanisms, including hydrogen bonding, electrostatic attraction, and the micropore-filling effect. The hypothesized mechanisms were further supported by the observed pH dependence adsorption. Nearly no influence was observed by solution ionic strength and dissolved humic acids. Findings in this study highlight the potential of using CTF as an effective adsorbent for 4,4′-PDOL removal.

中文翻译：

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共价基于三嗪的骨架从水溶液中吸附4,4'-（丙烷-2,2-二基）二酚

4,4'-（丙烷-2,2-二基丙烷）二酚（4,4'-PDOL）是常见的干扰内分泌的物质，在生产和生活中被广泛使用。在这项研究中，合成了一种基于三嗪的共价骨架（CTF），并通过分批吸附实验评估了其对水溶液中4,4'-PDOL的吸附性能。表征结果表明，CTF具有有序的微孔结构，Brunauer–Emmett–Teller（BET）表面积为782.4 m ² ·g ^–1，孔体积为0.40 cm ³ ·g ^–1。间歇吸附实验表明，用Freundlich吸附模型可以很好地描述4,4'-PDOL在CTF上的吸附动力学，然后是假二级动力学和吸附等温线。4,4'-PDOL由于包括氢键，静电吸引和微孔填充作用在内的几种特定的非疏水机制，因此具有很强的吸附亲和力。所观察到的pH依赖性吸附进一步支持了假设的机理。溶液离子强度和溶解的腐殖酸几乎没有观察到影响。这项研究的发现突出了使用CTF作为4,4'-PDOL去除有效吸附剂的潜力。