Application of soybean residue (okara) as a low-cost adsorbent for reactive dye removal from aqueous solution
Application of soybean residue (okara) as a low-cost adsorbent for reactive dye removal from aqueous solution
复制标题
豆渣（豆渣）作为低成本吸附剂去除水溶液中活性染料的应用
DOI：
10.1080/19443994.2013.865568
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发表时间：
2015-02-20
影响因子：
1.1
通讯作者：
He, Yang
中科院分区：
文献类型：
--
作者：
Gao, Jingfeng;Si, Chunying;He, Yang
摘要研究了奥卡拉作为一种低成本吸附剂对活性艳蓝KN-R（RBB）的吸附性能。进行了批吸附实验，以评估pH值，吸附剂用量，初始染料浓度和温度的影响。结果表明，强酸性条件有利于吸附过程，最佳pH值为2.0。Langmuir-Freundlich（L-F）等温线与平衡数据拟合良好。由L-F等温线确定的最大吸附容量在20、35和50°C下分别为68.67、159.60和402.58 mg/g。吸附动力学研究表明，吸附符合准二级动力学模型，吸附速率受边界层扩散和颗粒内扩散的共同影响。热力学研究表明吸附过程具有自发吸热的性质。傅里叶变换红外光谱分析表明，化学官能团（如氨基）。
AbstractThis study investigated the feasibility of using okara as a low-cost adsorbent for the removal of Reactive Brilliant Blue KN-R (RBB), a typical reactive dye, from aqueous solution. Batch adsorption experiments were conducted to evaluate the effects of pH, adsorbent dosage, initial dye concentration, and temperature. It was proved that strong acidic condition was favorable for the adsorption process and the optimal pH was 2.0. Langmuir–Freundlich (L–F) isotherm fitted well with the equilibrium data. The maximum adsorption capacity determined from the L–F isotherm was 68.67, 159.60, and 402.58 mg/g at 20, 35, and 50°C, respectively. Kinetic studies showed that adsorption of RBB followed the pseudo-second-order kinetic model, both boundary layer diffusion and intra-particle diffusion might affect the adsorption rate. Thermodynamic study demonstrated the spontaneous and endothermic natures of the adsorption process. Fourier transform infrared analysis revealed that chemical functional groups (e.g. ami...