Chemistry Department, Faculty of Science, Suez University, Suez, Egypt.
Center of Materials Science, Zewail City Science and Technology, Giza, Egypt.
Environ Technol. 2020 Sep;41(22):2854-2862. doi: 10.1080/09593330.2019.1585481. Epub 2019 Mar 4.
The polymeric nanocomposites polyaniline/graphene oxide (PANI/GO) and polyaniline/reduced graphene oxide (PANI/RGO) were synthesized for effective dye removal through the adsorption process. Synthesized composites were characterized by XRD, SEM, TEM and FTIR analyses. The sorption of methylene blue dye (MB) on the PANI/GO or (PANI/RGO) composites were studied as a function of contact time, concentration, temperature, adsorbent dosage and pH, and the results showed that MB sorption was dependent on pH value. The optimum concentration of the dye and the contact time for sorption of MB on PANI/GO or PANI/RGO was determined to be 270 min and 50 mg/L, respectively while the adsorbent dosage of PANI/GO and PANI/RGO were determined to be 0.4 and 0.3 g, respectively. At optimum conditions, the nature of the adsorption process have been investigated by kinetic and isotherm models. The results showed that the adsorption process followed the pseudo first-order kinetics this noticed from the higher value of correlation coefficient ( = 0.991) and was best suited to the Langmuir model. The maximum dye adsorption capacity of PANI/GO and PANI/RGO were estimated to be 14.2 and 19.2 mg g respectively. From the results, it can be assured that the PANI/RGO is more effectively than PANI/GO for the removal of dye pollutants in water.
通过吸附过程，合成了聚苯胺/氧化石墨烯（PANI/GO）和聚苯胺/还原氧化石墨烯（PANI/RGO）两种高分子纳米复合材料，以实现对染料的有效去除。采用 XRD、SEM、TEM 和 FTIR 分析对合成的复合材料进行了表征。研究了亚甲基蓝染料（MB）在 PANI/GO 或（PANI/RGO）复合材料上的吸附，考察了接触时间、浓度、温度、吸附剂用量和 pH 值等因素对 MB 吸附的影响，结果表明 MB 的吸附依赖于 pH 值。确定了 PANI/GO 或 PANI/RGO 吸附 MB 的最佳染料浓度和接触时间分别为 270 min 和 50 mg/L，而 PANI/GO 和 PANI/RGO 的最佳吸附剂用量分别为 0.4 和 0.3 g。在最佳条件下，通过动力学和等温线模型研究了吸附过程的性质。结果表明，吸附过程遵循准一级动力学，这从更高的相关系数（=0.991）值中可以看出，并且最适合 Langmuir 模型。PANI/GO 和 PANI/RGO 的最大染料吸附容量分别估计为 14.2 和 19.2 mg/g。从结果可以看出，PANI/RGO 比 PANI/GO 更有效地去除水中的染料污染物。
