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TiO2/P(AM-co-AMPS) monolith prepared by CO2-in-water HIPEs and its potential application in wastewater treatment
Reactive & Functional Polymers ( IF 5.1 ) Pub Date : 2020-04-16 , DOI: 10.1016/j.reactfunctpolym.2020.104604
Yong Dong , Liqin Cao , Yongxia Yang , Xiujuan Wu , Jide Wang

Removing dyes and antibiotics from wastewater remains the current requirement for a global health problem. The ionic macroporous adsorbent is an efficient solution to this problem. Herein, a novel sulfonated TiO2/poly(acrylamide-co-2-acrylamido-2-methylpropanesulfonic acid) [TiO2/P(AM-co-AMPS)] macroporous composite monolith was first prepared by copolymerization of AM and AMPS in mTiO2-costabilized CO2-in-water Pickering high internal phase emulsions (HIPEs). The composite monoliths were characterized using XRD, SEM, confocal laser scanning microscopy, EDS mapping, FTIR, TGA, and mercury injection methods. The mechanical properties of the TiO2/P(AM-co-AMPS) HIPE were also evaluated. The void diameter could be adjusted by changing the density of carbon dioxide and the amount of mTiO2. The equilibrium swelling ratios of TiO2/P(AM-co-AMPS) with different contents of crosslinking agent of 2, 5, and 10 wt% (AM+AMPS) were 93, 37, and 19 g/g, respectively. TiO2/P(AM-co-AMPS) was used to remove methylene blue (MB) and tetracycline (TC) for evaluating the adsorptive properties of the composite monoliths. Results indicated that the main adsorption driving force was the electrostatic attraction between −SO3 and MB/TC. Adsorption experiments were conducted using a batch technique. The adsorption capacities of TiO2/P(AM-co-AMPS) for MB and TC were 1660 and 1128 mg/g in a wide pH range of 3–10. The equilibrium saturation point could be reached after 90 min for MB and 360 min for TC. Thereafter, the removal of MB and TC by gravity-driven separation was presented. The breakthrough curve and reuse evaluation for the removal of MB/TC were also studied in detail.



中文翻译:

水中CO 2 HIPEs制备的TiO 2 / P(AM- co -AMPS)整料及其在废水处理中的潜在应用

从废水中去除染料和抗生素仍然是当前全球健康问题的要求。离子大孔吸附剂是解决此问题的有效方法。在本文中,一种新颖的磺化的TiO 2 /聚(丙烯酰胺--2-丙烯酰胺基-2-甲基丙磺酸)的TiO 2 / P(AM--AMPS)]首先由在AM和AMPS共聚制备大孔复合整料TiO 2稳定化的水中CO 2皮克林高内相乳液(HIPEs)。使用XRD,SEM,共聚焦激光扫描显微镜,EDS映射,FTIR,TGA和汞注入方法对复合材料整体进行了表征。TiO 2的机械性能还评估了/ P(AM- co- AMPS)HIPE。空隙直径可以通过改变二氧化碳的密度和m TiO 2的量来调节。不同交联剂含量为2、5和10 wt%(AM + AMPS)的TiO 2 / P(AM- co- AMPS)的平衡溶胀比分别为93、37和19 g / g。TiO 2 / P(AM- co- AMPS)用于去除亚甲基蓝(MB)和四环素(TC),以评估复合整料的吸附性能。结果表明,该主吸附驱动力是-SO之间的静电引力3 -和MB / TC。吸附实验使用间歇技术进行。在3-10的宽pH范围内,TiO 2 / P(AM- co- AMPS)对MB和TC的吸附能力分别为1660和1128 mg / g。MB的90分钟和TC的360分钟后,可以达到平衡饱和点。此后,提出了通过重力驱动分离去除MB和TC的方法。还详细研究了去除MB / TC的突破曲线和再利用评估。

更新日期:2020-04-16
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