高抗盐聚合物负载离子液体吸附剂，用于超高容量去除水中的<i>对</i>硝基苯酚,ACS Sustainable Chemistry & Engineering

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高抗盐聚合物负载离子液体吸附剂，用于超高容量去除水中的对硝基苯酚
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-04-16 00:00:00 , DOI: 10.1021/acssuschemeng.8b06198
Meng Cheng _{1,

2} , Juhui Jiang _{1,

3} , Jianji Wang ₃ , Jing Fan ₁

Affiliation

仍然非常需要探索新的吸附剂，特别是那些具有超高吸附能力，超强抗干扰能力和出色再生能力的吸附剂。在此，通过化学接枝制备了一种新型的氯甲基聚苯乙烯树脂负载型任务型离子液体吸附剂，并通过间歇法和动态柱洗脱法系统地研究了其从水中去除对硝基苯酚（PNP）的性能。结果表明，该吸附剂不仅在30min内对高浓度PNP表现出优异的吸附性能，超高吸附能力为1269.8 mg / g，而且还可以有效地从低至0.0025 mg / L的水中去除痕量PNP。水中常见的干扰离子和中性分子，尤其是K ⁺，钠⁺，钙²⁺，镁²⁺，NO ₃^-和Cl ^-，不与去除PNP的即使它们的浓度（1摩尔/ L）均高于1 000 000倍比PNP，干扰的其表明其具有从高盐度废水中去除PNP的潜力。吸附剂可以很容易地再生和循环至少10次，而不会损失分离性能。用各种方法研究了可能的吸附机理。此外，吸附剂被用于去除真实水样中的PNP，并报告了令人鼓舞的结果。

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Highly Salt Resistant Polymer Supported Ionic Liquid Adsorbent for Ultrahigh Capacity Removal of p-Nitrophenol from Water

The exploration of new adsorbents is still highly desirable, especially those with ultrahigh adsorption capacity, super anti-interference ability, and excellent regeneration power. Herein, a novel chloromethyl polystyrene resin supported task-specific ionic liquid adsorbent was prepared by chemical grafting and its performance to remove p-nitrophenol (PNP) from water was systematically investigated by both batch process and dynamic column elution method. It was shown that the adsorbent not only exhibited excellent adsorption performance toward high concentration PNP with an ultrahigh adsorption capacity of 1269.8 mg/g within 30 min but also could effectively remove trace PNP from water at the concentration as low as 0.0025 mg/L. Common interfering ions and neutral molecules in water, especially K⁺, Na⁺, Ca²⁺, Mg²⁺, NO₃^–, and Cl^–, did not interfere with the removal of PNP even if their concentrations (1 mol/L) were 1 000 000 times higher than that of PNP, which indicates its potential in removal of PNP from high salinity wastewater. The adsorbent could be easily regenerated and recycled at least 10 times with no loss in separation performance. The possible adsorption mechanism was investigated in various approaches. In addition, the adsorbent was applied to remove PNP in real water samples, and promising results were reported.

更新日期：2019-04-16

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