Sharifpour Ebrahim, Haddadi Hedayat, Ghaedi Mehrorang
Department of Chemistry, Faculty of Sciences, Shahrekord University, P.O. Box 115, Shahrekord, Iran.
Department of Chemistry, Faculty of Sciences, Shahrekord University, P.O. Box 115, Shahrekord, Iran; Nanotechnology Research Center, Shahrekord University, 8818634141 Shahrekord, Iran.
Ultrason Sonochem. 2017 May;36:236-245. doi: 10.1016/j.ultsonch.2016.11.011. Epub 2016 Nov 11.
Present study is devoted on the efficient application of Sn (O, S)-NPs -AC for simultaneous sonicated accelerated adsorption of some dyes from single and multi-components systems. Sn (O, S) nanoparticles characterization by FESEM, EDX, EDX mapping and XRD revel its nano size structure with high purity of good crystallinity. Present adsorbent due to its nano spherical shape particles with approximate diameter of 40-60nm seems to be highly effective in this regard. The effects of five variables viz. pH (3.5-9.5), 0.010-0.028g of adsorbent and 0.5-6.5min mixing by sonication is good and practical conditions for well and expected adsorption of MB and CV over concentration range of 3-15mgL. Combination of response surface methodology (RSM) based on central composite design (CCD) and subsequent of analysis of variance (ANOVA) and t-test statistics were used to test the significance of the independent variables and their interactions. Regression analysis reveal that experimental data with high repeatability and efficiency well represented by second-order polynomial model with coefficient of determination value of 0.9988 and 0.9976 for MB and CV, respectively following conditions like pH 8.0, 0.016g adsorbent, 15mgL of both dyes 4min sonication time is proportional with achievement of experimental removal percentage of 99.80% of MB and 99.87% of CV in batch experiment. Evaluation and estimation of adsorption data with Langmuir and Freundlich isotherm well justify the results based on their correlation coefficient and error analysis confirm that Langmuir model is good model with adsorption capacity of 109.17 and 115.34mgg in single system and 95.69 and 102.99mgg in binary system for MB and CV, respectively. MB and CV kinetic and rate of adsorption well fitted by pseudo-second order equation both in single and binary systems and experimental results denote more and favorable adsorption of CV than respective value in single system. The pseudo-second-order rate constant k in binary system larger than single system.
本研究致力于Sn (O, S)-NPs -AC在超声加速下从单组分和多组分体系中同时高效吸附某些染料的应用。通过场发射扫描电子显微镜（FESEM）、能量散射X射线光谱（EDX）、EDX映射和X射线衍射（XRD）对Sn (O, S)纳米颗粒进行表征，揭示了其具有高纯度良好结晶性的纳米尺寸结构。由于其纳米球形颗粒的直径约为40 - 60nm，目前的吸附剂在这方面似乎非常有效。五个变量的影响，即pH值（3.5 - 9.5）、0.010 - 0.028g吸附剂以及通过超声处理混合0.5 - 6.5分钟，是在3 - 15mg/L浓度范围内对亚甲基蓝（MB）和结晶紫（CV）进行良好且预期吸附的良好实用条件。基于中心复合设计（CCD）的响应面方法（RSM）以及随后的方差分析（ANOVA）和t检验统计被用于检验自变量及其相互作用的显著性。回归分析表明，在pH值为8.0、吸附剂0.016g、两种染料浓度均为15mg/L、超声处理时间4分钟等条件下，实验数据具有高重复性和效率，分别用二阶多项式模型很好地表示，MB和CV的决定系数值分别为0.9988和0.9976，这与分批实验中MB的99.80%和CV的99.87%的实验去除率的实现成正比。用朗缪尔和弗伦德利希等温线对吸附数据进行评估和估计，基于它们的相关系数很好地证明了结果，误差分析证实朗缪尔模型是一个良好的模型，在单组分体系中MB和CV的吸附容量分别为109.17和115.34mg/g，在二元体系中分别为95.69和102.99mg/g。MB和CV在单组分和二元体系中的吸附动力学和吸附速率均很好地拟合了伪二级方程，实验结果表明CV的吸附比单组分体系中的相应值更多且更有利。二元体系中的伪二级速率常数k大于单组分体系。
