Adsorption of safranin dye from aqueous solutions using a low-cost agro-waste material soybean hull
Adsorption of safranin dye from aqueous solutions using a low-cost agro-waste material soybean hull
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DOI：
10.1080/19443994.2014.991758
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发表时间：
2016-02-19
影响因子：
1.1
通讯作者：
Singh, V. K.
中科院分区：
文献类型：
--
作者：
Chandane, Vishal;Singh, V. K.
本文旨在开发一种以农业废弃物大豆壳为吸附剂的低成本吸附方法来去除废水中的色度。采用傅里叶变换红外光谱、扫描电子显微镜、X射线衍射仪和Zeta电位仪对大豆壳的形态进行了表征。利用大豆皮作吸附剂，去除水溶液中的藏红花染料。考察了pH值、染料初始浓度、吸附剂投加量、吸附剂粒径和接触时间等操作参数对吸附效果的影响。吸附数据用Freundlich、Langmuir和Tempkin吸附等温线模型模拟。热力学参数表明，吸附过程是自发的吸热过程。染料的吸附动力学符合准二级动力学。解吸研究阐明了吸附和回收吸附材料的机理。结果表明，大豆皮是一种天然、环保、低成本的吸附剂，具有较大的吸附容量，可以有效地去除废水中的染料。
The present paper is aimed to develop a low-cost adsorption method using an agro-waste material soybean hull as an adsorbent for color removal from wastewater. The morphological characterization of soybean hull was done by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis, and zeta potential measurement. The soybean hull was utilized as an adsorbent for removal of safranin dye from the aqueous solutions. The effects of operating parameters such as pH, initial dye concentration, adsorbent dose, particle size of the adsorbent, and contact time were investigated. The adsorption data were modeled by the Freundlich, Langmuir, and Tempkin adsorption isotherm models. The thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic. Also, the adsorption kinetics of dyes were found to follow the pseudo-second-order kinetics. Desorption study elucidates the mechanism of adsorption as well as recovery of adsorbent material. The results revealed that the soybean hull, a natural, eco-friendly, and low-cost adsorbent has a relatively large adsorption capacity and can be effectively used for removal of dyes from the wastewater.