Abualnaja Khamael M, Alprol Ahmed E, Abu-Saied M A, Mansour Abdallah Tageldein, Ashour Mohamed
Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
National Institute of Oceanography and Fisheries, NIOF, Cairo 11516, Egypt.
Nanomaterials (Basel). 2021 Apr 28;11(5):1144. doi: 10.3390/nano11051144.
In this study, a polymeric (acrylonitrile--styrene) P(AN--St) composite was impregnated with adsorbents, such as sulfonated and multiwall carbon nanotubes (MWCNTs), to increase the adsorptive characteristics of the nanocomposite upon the removal of methyl orange (MO) dye under different conditions. A novel nanocomposite copolymer mixture of P(AN--St) and SP(AN--St) was used. MWCNTs were prepared by a low-cost chemical vapor deposition (CVD) process. Variation in MO adsorption onto the three nanocomposites was examined in an aqueous solution via the batch technique with respect to contact time, initial MO concentration, adsorbent dosage, pH, and temperature. The surface of the nanocomposites was characterized by a scanning electron microscope (SEM), particle size distribution (PSD), Fourier transform infrared (FTIR), and Raman analysis. The experimental data showed that the efficiency of P(AN--St)/ MWCNT removal increased under the conditions of an acidic pH (3 and 5) with an agitation speed of 140 rpm, a sorbent weight of 0.01 g, and 20 mg of initial dye. The maximum sorption capacities were 121.95, 48.78, and 47.84 mg g for the P(AN--St)/ MWCNTs, SP(AN--St), and P(AN--St) composites, respectively, as assessed by the Langmuir model. Additional isotherm models, such as the Freundlich, Temkin, and Halsey models, were used to examine the experimental data. A pseudo-second-order model was found to be more fitting for describing the sorption.
在本研究中，一种聚合物（丙烯腈 - 苯乙烯）P（AN - St）复合材料用吸附剂进行了浸渍，如磺化和多壁碳纳米管（MWCNT），以提高该纳米复合材料在不同条件下去除甲基橙（MO）染料时的吸附特性。使用了一种新型的P（AN - St）和SP（AN - St）纳米复合共聚物混合物。MWCNT通过低成本化学气相沉积（CVD）工艺制备。通过间歇技术在水溶液中研究了三种纳米复合材料对MO的吸附随接触时间、初始MO浓度、吸附剂用量、pH值和温度的变化。通过扫描电子显微镜（SEM）、粒度分布（PSD）、傅里叶变换红外（FTIR）和拉曼分析对纳米复合材料的表面进行了表征。实验数据表明，在酸性pH值（3和5）、搅拌速度为140 rpm、吸附剂重量为0.01 g以及初始染料为20 mg的条件下，P（AN - St）/ MWCNT的去除效率有所提高。根据朗缪尔模型评估，P（AN - St）/ MWCNT、SP（AN - St）和P（AN - St）复合材料的最大吸附容量分别为121.95、48.78和47.84 mg/g。还使用了其他等温线模型，如弗伦德里希、坦金和哈尔西模型来检验实验数据。发现拟二级模型更适合描述吸附过程。
