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Surface modification of Polypropylene Nonwoven by plasma and β-Cyclodextrin: Optimization and cationic dye removal studies
Surfaces and Interfaces ( IF 6.2 ) Pub Date : 2021-06-17 , DOI: 10.1016/j.surfin.2021.101278
Aminoddin Haji , Mohammad Khajeh Mehrizi , Mohsen Sarani

Polypropylene (PP) nonwoven fabric was modified by grafting of β-cyclodextrin using a pad-dry-cure process. Citric acid and sodium hypophosphite were used as crosslinking agent and catalyst, respectively. To improve the wettability and loading of β-cyclodextrin in the grafting process, oxygen plasma pretreatment was employed. FTIR, SEM, and EDX analyses confirmed the grafting of β-CD on PP fibers. Plasma treatment time, β-cyclodextrin concentration, curing temperature, and curing time were chosen as the main process variables and the effect of each variable on weight gain (%) of the samples and their ability to remove a cationic dye (C.I. Basic Blue 3) from water was investigated. Plasma treatment time of 5 min, β-cyclodextrin concentration of 15%, curing temperature of 150 °C, and curing time of 10 min were found to be the optimum conditions for obtaining the maximum weight gain (38.79%) and dye removal efficiency (88.72%). The effect of different parameters including pH, time, temperature, initial concentration of the dye, and amount of adsorbent on the dye removal efficiency of the prepared adsorbent was investigated and the isotherm and kinetics of the process was studied. It was indicated that the removal of Basic Blue 3 from aqueous media using the prepared adsorbent was best fitted to Freundlich isotherm and Pseudo-second order kinetic models.



中文翻译:

等离子体和β-环糊精对聚丙烯非织造布的表面改性:优化和阳离子染料去除研究

聚丙烯(PP)非织造布通过使用轧干固化工艺接枝β-环糊精进行改性。柠檬酸和次磷酸钠分别用作交联剂和催化剂。为了提高接枝过程中β-环糊精的润湿性和负载量,采用了氧等离子体预处理。FTIR、SEM 和 EDX 分析证实了 β-CD 在 PP 纤维上的接枝。等离子体处理时间、β-环糊精浓度、固化温度和固化时间被选为主要工艺变量,每个变量对样品增重(%)的影响及其去除阳离子染料的能力(CI Basic Blue 3 ) 来自水进行了调查。等离子处理时间5min,β-环糊精浓度15%,固化温度150℃,发现10分钟的固化时间是获得最大增重(38.79%)和染料去除效率(88.72%)的最佳条件。考察了pH、时间、温度、染料初始浓度、吸附剂用量等不同参数对制备的吸附剂脱染料效率的影响,并研究了该过程的等温线和动力学。表明使用制备的吸附剂从水性介质中去除碱性蓝 3 最适合 Freundlich 等温线和伪二级动力学模型。考察了吸附剂用量对制备的吸附剂脱染料效率的影响,并研究了该过程的等温线和动力学。表明使用制备的吸附剂从水性介质中去除碱性蓝 3 最适合 Freundlich 等温线和伪二级动力学模型。考察了吸附剂用量对制备的吸附剂脱染料效率的影响,并研究了该过程的等温线和动力学。表明使用制备的吸附剂从水性介质中去除碱性蓝 3 最适合 Freundlich 等温线和伪二级动力学模型。

更新日期:2021-06-24
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