Recovery of oil from oil-in-water emulsion using biopolymers by adsorptive method
Recovery of oil from oil-in-water emulsion using biopolymers by adsorptive method
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DOI：
10.1016/j.ijbiomac.2014.07.002
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发表时间：
2014-09-01
影响因子：
8.2
通讯作者：
Meenakshi, Sankaran
中科院分区：
文献类型：
--
作者：
Elanchezhiyan, S. Sd.;Sivasurian, N.;Meenakshi, Sankaran
在本研究中，它的目的是确定，一种低成本的吸附剂回收油的水包油乳液使用生物聚合物，如甲壳素和壳聚糖。由于其疏水性质，甲壳素具有比壳聚糖更大的吸附能力。采用FTIR、SEM、EDAX、XRD、TGA和DSC等技术对甲壳素和壳聚糖进行了表征。在间歇平衡模式下，进行了系统的研究，以优化各种平衡参数，接触时间、pH值、剂量、油的初始浓度和温度。吸附过程达到平衡，在40分钟的接触时间和百分比去除油被认为是较高的（90%），在酸性介质中。用Freundlich和Langmuir模型描述了平衡等温线，并计算了等温常数。热力学参数，如Δ G度，Δ H度和Δ S度的计算，以找出吸附机制的本质。动力学研究与反应为基础的和扩散为基础的模型进行了研究。建立了合适的除油机理。(C)2014爱思唯尔有限公司版权所有。
In the present study, it is aimed to identify, a low cost sorbent for the recovery of oil from oil-in-water emulsion using biopolymers such as chitin and chitosan. Chitin has the greater adsorption capacity than chitosan due to its hydrophobic nature. The characterizations of chitin and chitosan were done using FTIR, SEM, EDAX, XRD, TGA and DSC techniques. Under batch equilibrium mode, a systematic study was performed to optimize the various equilibrium parameters viz., contact time, pH, dosage, initial concentration of oil, and temperature. The adsorption process reached equilibrium at 40 min of contact time and the percentage removal of oil was found to be higher (90%) in the acidic medium. The Freundlich and Langmuir models were applied to describe the equilibrium isotherms and the isotherm constants were calculated. Thermodynamic parameters such as Delta G degrees, Delta H degrees and Delta S degrees were calculated to find out the nature of the sorption mechanism. The kinetic studies were investigated with reaction-based and diffusion-based models. The suitable mechanism for the removal of oil has been established. (C) 2014 Elsevier B.V. All rights reserved.