Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Mar 25;122:223-31. doi: 10.1016/j.saa.2013.10.116. Epub 2013 Nov 9.
In this research, the adsorption rate of safranine O (SO) onto tin sulfide nanoparticle loaded on activated carbon (SnS-NPAC) was accelerated by the ultrasound. SnS-NP-AC was characterized by different techniques such as SEM, XRD and UV-Vis measurements. The present results confirm that the ultrasound assisted adsorption method has remarkable ability to improve the adsorption efficiency. The influence of parameters such as the sonication time, adsorbent dosage, pH and initial SO concentration was examined and evaluated by central composite design (CCD) combined with response surface methodology (RSM) and desirability function (DF). Conducting adsorption experiments at optimal conditions set as 4 min of sonication time, 0.024 g of adsorbent, pH 7 and 18 mg L(-1) SO make admit to achieve high removal percentage (98%) and high adsorption capacity (50.25 mg g(-)(1)). A good agreement between experimental and predicted data in this study was observed. The experimental equilibrium data fitting to Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich models show that the Langmuir model is a good and suitable model for evaluation and the actual behavior of adsorption. Kinetic evaluation of experimental data showed that the adsorption processes followed well pseudo-second-order and intraparticle diffusion models.
在这项研究中，超声加速了负载在活性炭上的硫化锡纳米粒子（SnS-NPAC）对藏红 O（SO）的吸附速率。采用 SEM、XRD 和 UV-Vis 测量等不同技术对 SnS-NP-AC 进行了表征。目前的结果证实，超声辅助吸附方法具有显著提高吸附效率的能力。通过中心复合设计（CCD）结合响应面法（RSM）和适宜性函数（DF），考察和评估了超声时间、吸附剂用量、pH 和初始 SO 浓度等参数的影响。在优化条件下（超声时间 4 分钟、吸附剂用量 0.024g、pH7 和初始 SO 浓度 18mg/L）进行吸附实验，可实现高去除率（98%）和高吸附容量（50.25mg/g）。研究中观察到实验数据与预测数据之间具有良好的一致性。实验平衡数据拟合 Langmuir、Freundlich、Tempkin 和 Dubinin-Radushkevich 模型表明，Langmuir 模型是评价和吸附实际行为的良好和合适模型。实验数据的动力学评价表明，吸附过程较好地遵循了伪二阶和内扩散模型。
