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Synthesis of highly water-dispersible adsorbent derived from alkali-modified hyper-cross-linked polymer for efficient removal of various organic contaminants and ammonia
Journal of Water Process Engineering ( IF 6.3 ) Pub Date : 2021-01-14 , DOI: 10.1016/j.jwpe.2020.101902
Aibin Hu , Li Liqing , Meiyi Zhang , Yanyang Liu , Guiying Liao , Dongsheng Wang

A novel highly water-dispersible polymer-based adsorbent (HCP-BPA-Na) was

synthesized by using bisphenol A (BPA) containing polar functional group as raw material via cross-linking reaction, and subsequently treated with alkali solution. Owing to its abundant oxygen groups, HCP-BPA-Na displays large uptake capacity 645.16 and 268.09 mg g−1, and fast adsorption rates 5.92 × 10-3 and 9.90 × 10-3 g mg−1 min−1for methylene blue (MB) and tetracycline (TC), respectively. Besides, it's NH3 uptake capacity can reach 7.2 mmol g-1 at 298 K and1 bar. The removal mechanism for MB and TC was primarily caused by electrostatic attraction and ion exchange, and for the uptake of NH3 was mainly attributed to the high affinity between the basic NH3 molecule and acidic sites of the HCP-BPA-Na. Additionally, HCP-BPA-Na possesses the higher adsorption performance for MB and TC in real wastewater because of the promotion effect of dissolved organic matter and exhibited excellent adsorption ability towards MB and MO due to the synergistic enhanced effects of multi-mechanisms in binary (MB/MO) dye solutions. This study introduces a green and simple strategy for designing an oxygen-rich functional adsorbent with versatile adsorption properties, high efficiency and fast rate, which can be applied as a promising sorbent to eliminate water-soluble contaminants from the real wastewater and ammonia in the air.



中文翻译:

合成自碱改性的超交联聚合物的高水分散性吸附剂,可有效去除各种有机污染物和氨

一种新型的高水分散性聚合物基吸附剂(HCP-BPA-Na)

以含极性官能团的双酚A(BPA)为原料经交联反应合成,然后用碱溶液处理。由于HCP-BPA-Na具有丰富的氧基团,因此显示出645.16和268.09 mg g -1的大吸收容量,对亚甲基蓝的快速吸附速率为5.92×10 -3和9.90×10 -3 g mg -1  min -1 MB)和四环素(TC)。此外,在298 K和1 bar下,其NH 3吸收能力可以达到7.2 mmol g -1。MB和TC的去除机理主要是由静电吸引和离子交换以及NH 3的吸收引起的这主要归因于碱性NH 3分子与HCP-BPA-Na酸性位点之间的高亲和力。此外,由于溶解有机物的促进作用,HCP-BPA-Na对MB和TC在实际废水中具有较高的吸附性能,并且由于二元体系中多种机理的协同增效作用,因此对MB和MO具有优异的吸附能力。 MB / MO)染料溶液。这项研究介绍了一种绿色简单的策略,以设计具有多种吸附特性,高效和快速的富氧功能性吸附剂,可将其用作一种有前途的吸附剂,以消除实际废水和空气中的氨中的水溶性污染物。

更新日期:2021-01-14
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