School of Studies in Chemistry, PT. Ravishankar Shukla University, Raipur, 492010, India.
Bull Environ Contam Toxicol. 2014 Nov;93(5):549-54. doi: 10.1007/s00128-014-1381-8. Epub 2014 Sep 26.
The removal of phenolic compounds, i.e., o-cresol, m-cresol, and p-cresol from aqueous solution have been evaluated employing activated carbon (AC) coated with polymer supported iron nanoparticles (FeNPs). The synthesized FeNPs were characterized by scanning electron microscope and X-ray diffraction analysis. High correlation coefficient values indicated that the adsorption of phenolic compounds onto AC coated with polyvinylpyrrolidon (PVP) supported FeNPs obey Freundlich and Langmuir adsorption isotherms. Higher Freundlich and Langmuir constant values for AC coated with PVP supported FeNPs indicated its greater efficiency than AC. The adsorption data are well represented by both the Freundlich and Langmuir isotherms, indicating favourable adsorption of cresols by the adsorbents. Cresols were effectively removed (90 %) by adsorption process from aqueous solution using AC coated with FeNPs. The percentage removal of above phenolic compounds was studied under varying experimental conditions such as pH, temperature, adsorbent dosage, and contact time. The adsorption of phenolic compounds is quite sensitive to pH of the suspension and optimum uptake value was found at pH 7.0. Temperature also has a favorable effect on adsorption when varied from 20 to 50°C. On the contrary, beyond 30°C, a decrease in the adsorption was noticed.
采用聚合物负载铁纳米粒子（FeNPs）涂覆的活性炭（AC）评估了从水溶液中去除酚类化合物，即邻甲酚、间甲酚和对甲酚。合成的 FeNPs 通过扫描电子显微镜和 X 射线衍射分析进行了表征。高相关系数值表明，酚类化合物在涂覆有聚乙烯吡咯烷酮（PVP）的 FeNPs 负载的 AC 上的吸附符合 Freundlich 和 Langmuir 吸附等温线。涂覆有 PVP 负载 FeNPs 的 AC 的更高 Freundlich 和 Langmuir 常数值表明其效率高于 AC。吸附数据通过 Freundlich 和 Langmuir 等温线都得到了很好的表示，表明吸附剂对甲酚的吸附是有利的。用 FeNPs 涂覆的 AC 可有效（90%）从水溶液中去除酚类化合物。研究了在不同的实验条件下，如 pH 值、温度、吸附剂用量和接触时间，对上述酚类化合物的去除百分比。酚类化合物的吸附对悬浮液的 pH 值非常敏感，在 pH 值为 7.0 时发现了最佳的吸附值。温度从 20°C 到 50°C 变化时，对吸附也有有利的影响。相反，超过 30°C 时，吸附会减少。
