Adsorption of Nicotine on Ordered Mesoporous Carbon in Aqueous Solution
Date Issued
2014
Date
2014
Author(s)
Lin, Hsin-Yu
Abstract
Nicotine (3-substituted pyridine, C10H14N2), a highly toxic alkaloid found in municipal wastewater, poses a serious public health concern. Since nicotine effluent standards have yet to be established, large quantities of tobacco waste from cigarette production have led to an increase in nicotine concentration in both underground and surface water flows. However, the technology to treat nicotine contaminated water is lacking. Advanced oxidation processes (AOPs) have been used in recent years, but do not achieve total mineralization of the nicotine, and therefore the toxicity of the intermediates generated, and their evolution during the oxidation process. Therefore, in this study a novel material, ordered mesoporous carbons with embedded metallic nickel nanoparticles (OMC-Ni), was synthesized for improving the adsorption of nicotine. A simple and low temperature (50℃) hydrothermal method was used which made nickel particles homogeneously disperse in the carbon matrices, while the pore mesostructure remained intact. The results can be demonstrated by using XRD, SEM, TEM and BET. The adsorption test results of nicotine removal rate at pH= 2, 6, 8.7, and 10 were 4.0, 27.7, 46.4 and 84.6%, respectively, at an initial 300μM nicotine concentration for 180 min. The adsorption amount of nicotine decreased with decreasing pH of aqueous solution, whereas the adsorption amount tended to increase at basic pH condition. The OMC-Ni composites were demonstrated to be effective molecular adsorbents for magnetic separation. In addition, Life Cycle Assessment (LCA) was used to calculate the environmental impacts of different adsorbents (OMC-Ni and OMC) and repeat methods. The results revealed OMCs have lower energy consumption and are more environmentally friendly than OMC-Ni due to their great removal rate. In the study, we develop a new and successful method for nicotine removal, as well as a life cycle inventory of treatment technology.
Subjects
尼古丁
規則中孔洞碳材
鎳
吸附
生命週期評估
Type
thesis
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