Dashamiri Somayeh, Ghaedi Mehrorang, Dashtian Kheibar, Rahimi Mahmood Reza, Goudarzi Alireza, Jannesar Ramin
Chemistry Department, Yasouj University, Yasouj 75914-35, Iran.
Chemistry Department, Yasouj University, Yasouj 75914-35, Iran.
Ultrason Sonochem. 2016 Jul;31:546-57. doi: 10.1016/j.ultsonch.2016.02.008. Epub 2016 Feb 10.
Copper oxide nanoparticles loaded on activated carbon (CuO-NPs-AC) were prepared and fully analyzed and characterized with FE-SEM, XRD and FT-IR. Subsequently, this novel material was used for simultaneous ultrasound-assisted adsorption of brilliant green (BG), auramine O (AO), methylene blue (MB) and eosin yellow (EY) dyes. Problems regard to dyes spectra overlap in quaternary solution of this dyes were omitted by derivative spectrophotometric method. The best pH in quaternary system was studied by using one at a time method to achieved maximum dyes removal percentage. Subsequently, sonication time, adsorbent dosage and initial dyes concentrations influence on dyes removal was optimized by central composite design (CCD) combined with desirability function approach (DFA). Desirability score of 0.978 show optimum conditions set at sonication time (4.2 min), adsorbent mass (0.029 g), initial dyes concentration (4.5 mg L(-1)). Under this optimum condition the removal percentage for MB, AO, EY and BG dyes 97.58, 94.66, 96.22 and 94.93, respectively. The adsorption rate well fitted by pseudo second-order while adsorption capacity according to the Langmuir model as best equilibrium isotherm model for BG, MB, AO and EY was 20.48, 21.26, 22.34 and 21.29 mg g(-1), respectively.
制备了负载在活性炭上的氧化铜纳米颗粒（CuO-NPs-AC），并通过场发射扫描电子显微镜（FE-SEM）、X射线衍射仪（XRD）和傅里叶变换红外光谱仪（FT-IR）对其进行了全面分析和表征。随后，将这种新型材料用于同时超声辅助吸附亮绿（BG）、金胺O（AO）、亚甲基蓝（MB）和曙红Y（EY）染料。采用导数分光光度法解决了该染料四元溶液中染料光谱重叠的问题。采用一次改变一个因素的方法研究了四元体系中的最佳pH值，以实现最大的染料去除率。随后，通过中心复合设计（CCD）结合期望函数法（DFA）优化了超声处理时间、吸附剂用量和初始染料浓度对染料去除的影响。期望分数为0.978表明最佳条件设定为超声处理时间（4.2分钟）、吸附剂质量（0.029克）、初始染料浓度（4.5毫克/升）。在此最佳条件下，MB、AO、EY和BG染料的去除率分别为97.58%、94.66%、96.22%和94.93%。吸附速率符合准二级动力学模型，而根据朗缪尔模型，BG、MB、AO和EY的最佳平衡等温线模型的吸附容量分别为20.48、21.26、22.34和21.29毫克/克。
