ZnO nanoparticles loaded different mesh size of porous activated carbon prepared from Pinus eldarica and its effects on simultaneous removal of dyes: Multivariate optimization
ZnO nanoparticles loaded different mesh size of porous activated carbon prepared from Pinus eldarica and its effects on simultaneous removal of dyes: Multivariate optimization
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DOI：
10.1016/j.cherd.2017.07.011
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发表时间：
2017-09-01
影响因子：
3.9
通讯作者：
Dashtian, Kheibar
中科院分区：
文献类型：
--
作者：
Jafari, Maryam;Rahimi, Mahmood Reza;Dashtian, Kheibar
本文以美国黑松（Pinus eldarica）秸秆为原料，制备了不同孔径（35-200目）的介孔活性炭，作为ZnO纳米粒子沉积的良好、廉价和有用的载体。采用FTIR、XRD、BET、BJH、SEM和EDS等技术对该材料进行了表征，并将其用于间歇式超声辅助同时去除水溶液中的天青II（AZ-II）和金胺O（AO）染料。通过中心复合设计（CCD）考察并优化了超声时间、吸附剂质量、pH值、AZ-II和AO初始浓度等操作参数对吸附效率的影响。当超声时间为4.0 min，AZ-II和AO浓度为25 mg L-1，吸附剂用量为0.05 g，pH值为7.0时，AZ-II和AO的去除率分别为90.42%和98.14%。所有筛孔尺寸的实验平衡数据表明，Langmuir模型是一个很好的和合适的模型，用于评估和实际行为的吸附的待研究染料。动力学研究的实验数据为所有的网目尺寸显示，吸附过程是良好的伪二级。这些结果清楚地表明，该材料是一种有效的和低成本的吸附剂，用于处理含有AZ-II和AO染料的废水。(C)2017化学工程师学会。Elsevier B. V.出版，保留所有权利。
In this work, mesoporous activated carbon in different mesh size (35-200) was prepared from Pinus eldarica stalks (PES) as good, cheap and useful support for deposition of ZnO nanoparticles. This new material was characterized by FTIR, XRD, BET, BJH, SEM and EDS-mapping techniques and subsequently was used for the simultaneous ultrasound assisted removal of azure II (AZ-II) and auramine O (AO) dyes from aqueous solutions in batch method. The influence of operational parameters such as the sonication time, adsorbent mass, pH and initial AZ-II and AO concentration on adsorption efficiency were investigated and optimized via central composite design (CCD). Optimal conditions of adsorption experiments at desirability value of 0.98 were set as at 4.0 min of sonication time, 25 mg L-1 of AZ-II and AO concentration, 0.05 g of adsorbent and pH 7.0 which provides removal percentage of 90.42 and 98.14% for AO and AZ-II, respectively. The experimental equilibrium data for all mesh size showed that the Langmuir model is a good and suitable model for evaluation and the actual behavior of adsorption of understudy dyes. Kinetic studied of experimental data for all mesh size revealed that adsorption processes were good followed by pseudo-second-order. These results clearly demonstrated that this material is an efficient and low cost adsorbent for treatment of wastewater containing AZ-II and AO dyes. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.