Ghaedi M, Khafri H Zare, Asfaram A, Goudarzi A
Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jan 5;152:233-40. doi: 10.1016/j.saa.2015.06.128. Epub 2015 Jul 7.
The Janus Green B (JGB) adsorption onto homemade ZnO/Zn(OH)2 nanoparticles loaded on activated carbon (AC) which characterized by FESEM and XRD analysis has been reported. Combination of response surface methodology (RSM) and central composite design (CCD) has been employed to model and optimize variables using STATISTICA 10.0 software. The influence of parameters over pH (2.0-8.0), adsorbent (0.004-0.012g), sonication time (4-8min) and JGB concentration (3-21mgL(-1)) on JGB removal percentage was investigated and their main and interaction contribution was examined. It was revealed that 21mgL(-1) JGB, 0.012g ZnO/Zn(OH)2-NP-AC at pH 7.0 and 7min sonication time permit to achieve removal percentage more than 99%. Finally, a good agreement between experimental and predicted values after 7min was achieved using pseudo-second-order rate equation. The Langmuir adsorption is appropriate for correlation of equilibrium data. The small amount of adsorbent (0.008-0.015g) is applicable for successful removal of JGB (RE>99%) in short time (7min) with high adsorption capacity (81.3-98.03mgg(-1)).
已报道了通过场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）分析表征的载于活性炭（AC）上的自制ZnO/Zn(OH)₂纳米颗粒对詹纳斯绿B（JGB）的吸附情况。采用响应面法（RSM）和中心复合设计（CCD），使用STATISTICA 10.0软件对变量进行建模和优化。研究了pH值（2.0 - 8.0）、吸附剂用量（0.004 - 0.012g）、超声处理时间（4 - 8分钟）和JGB浓度（3 - 21mgL⁻¹）等参数对JGB去除率的影响，并考察了它们的主要作用和交互作用。结果表明，在pH值为7.0、超声处理7分钟的条件下，21mgL⁻¹的JGB与0.012g的ZnO/Zn(OH)₂-NP-AC可实现去除率超过99%。最后，使用伪二级速率方程，7分钟后实验值与预测值之间达成了良好的一致性。朗缪尔吸附等温式适用于平衡数据的关联。少量吸附剂（0.008 - 0.015g）适用于在短时间（7分钟）内成功去除JGB（去除率>99%），且具有高吸附容量（81.3 - 98.03mgg⁻¹）。
