稻草/Fe₃O₄纳米复合材料对铜（II）和铅（II）的快速吸附：优化、平衡等温线及吸附动力学研究

Rapid adsorption of copper(II) and lead(II) by rice straw/Fe₃O₄ nanocomposite: optimization, equilibrium isotherms, and adsorption kinetics study.

作者信息

Khandanlou Roshanak, Ahmad Mansor B, Fard Masoumi Hamid Reza, Shameli Kamyar, Basri Mahiran, Kalantari Katayoon

机构信息

Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.

Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia.

出版信息

PLoS One. 2015 Mar 27;10(3):e0120264. doi: 10.1371/journal.pone.0120264. eCollection 2015.

Rice straw/magnetic nanocomposites (RS/Fe3O4-NCs) were prepared via co-precipitation method for removal of Pb(II) and Cu(II) from aqueous solutions. Response surface methodology (RSM) was utilized to find the optimum conditions for removal of ions. The effects of three independent variables including initial ion concentration, removal time, and adsorbent dosage were investigated on the maximum adsorption of Pb (II) and Cu (II). The optimum conditions for the adsorption of Pb(II) and Cu(II) were obtained (100 and 60 mg/L) of initial ion concentration, (41.96 and 59.35 s) of removal time and 0.13 g of adsorbent for both ions, respectively. The maximum removal efficiencies of Pb(II) and Cu(II) were obtained 96.25% and 75.54%, respectively. In the equilibrium isotherm study, the adsorption data fitted well with the Langmuir isotherm model. The adsorption kinetics was best depicted by the pseudo-second order model. Desorption experiments showed adsorbent can be reused successfully for three adsorption-desorption cycles.

通过共沉淀法制备了稻草/磁性纳米复合材料（RS/Fe3O4-NCs），用于从水溶液中去除Pb(II)和Cu(II)。采用响应面法（RSM）来寻找去除离子的最佳条件。研究了初始离子浓度、去除时间和吸附剂用量这三个自变量对Pb(II)和Cu(II)最大吸附量的影响。分别获得了Pb(II)和Cu(II)吸附的最佳条件：初始离子浓度（100和60 mg/L）、去除时间（41.96和59.35 s）以及两种离子的吸附剂用量均为0.13 g。Pb(II)和Cu(II)的最大去除效率分别为96.25%和75.54%。在平衡等温线研究中，吸附数据与Langmuir等温线模型拟合良好。吸附动力学最好用伪二级模型来描述。解吸实验表明，吸附剂可以成功地重复使用三个吸附-解吸循环。