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The dye adsorption and antibacterial properties of composite polyacrylamide cryogels modified with ZnO
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2021-04-07 , DOI: 10.1016/j.jiec.2021.04.001
Murat İnal , Nuran Erduran , Murat Gökgöz

The present study aimed to modify the surface of polyacrylamide cryogels (PAC) with ZnO nanorods (ZNR) to provide them with antibacterial properties. The synthesized ZNR-modified composite PAC (ZMC) characterized by AAS, FTIR, SEM, XRD, XPS, BET surface analysis and TGA studies. A study of the adsorption of Orange G (OG) and antibacterial effect was performed on the synthesized ZMC. The highest adsorption capacity was determined to be at a dye concentration of 142.79 mg/g at 400 ppm, and a pH of 2. From the data obtained, it was found that adsorption fitted the pseudo-second-order kinetic model and Freundlich isotherm. Modified cryogels could be desorbed in a very short time – such as 30 min – and reused approximately twenty times with 80% efficiency. While ZMC cryogels did not show antibacterial activity in the dark, inhibition percentages were determined as 99.79 ± 3.94% and 99.81 ± 1.76%, at 1.78 mg/mL cryogel application, MIC90 values were determined as 1.589 ± 0.063 and 0.660 ± 0.028 mg/mL for Escherichia coli, and Staphylococcus aureus, respectively under visible light. The results showed that the composite cryogels obtained had a very high potential to be applied both in the removal of dyes from wastewater and in the purification of microorganism-contaminated water.



中文翻译:

ZnO修饰的聚丙烯酰胺复合凝胶的染料吸附和抗菌性能

本研究旨在用ZnO纳米棒(ZNR)改性聚丙烯酰胺冰凝胶(PAC)的表面,以使其具有抗菌性能。通过AAS,FTIR,SEM,XRD,XPS,BET表面分析和TGA研究对ZNR改性的合成PAC(ZMC)进行了表征。对合成的ZMC进行了橙G(OG)的吸附和抗菌作用的研究。确定最大的吸附容量是在400ppm的染料浓度为142.79  mg / g, pH为2时。从获得的数据中发现,吸附符合拟二级动力学模型和Freundlich等温线。改性的冰凝胶可以在很短的时间内解吸,例如30 分钟-并以80%的效率重复使用了大约20次。尽管ZMC凝胶在黑暗中未显示出抗菌活性,但在使用1.78 mg / mL冷冻凝胶时,抑制百分比确定为99.79  ±  3.94%和99.81  ±  1.76% ,MIC90值确定为1.589  ±  0.063和0.660  ±  0.028  mg / mL在可见光下分别用于大肠杆菌金黄色葡萄球菌。结果表明,所获得的复合冰晶具有很高的潜力,可用于去除废水中的染料和纯化被微生物污染的水。

更新日期:2021-04-26
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