ATR-FTIR AND UV-VIS AS TECHNIQUES FOR METHANOL ANALYSIS IN BIODIESEL-WASHING WASTEWATER

IF 0.5 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY
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Abstract

Methanol present in wastewater from the biodiesel industry can become an atmospheric pollutant and an environmental liability of effluents. This article proposes the development and performance evaluation of two spectroscopic methods, ATR-FTIR and UV-Vis, to identify and quantify methanol in aqueous media. The results of both ways exhibited remarkable linear detection, with a coefficient of determination (r2) > 0.99, wide working range, and relative standard deviation (RSD) < 12%. In the ATR-FTIR method, the detection and quantification limits were 0.064 and 0.128% m V-1, respectively. The UV-Vis method presented lower limits (0.005 and 0.008% m V-1, respectively). Finally, the methods were successfully applied to quickly and sensitively quantify the methanol present in wastewater from biodiesel-washing in a wide concentration range of 0.008-0.641% m V-1. Therefore, we evidenced the feasibility of spectroscopic methods in quality control for identifying and quantifying methanol in aqueous solution, with potential for application in biodiesel production industries and research laboratories. Mainly by ATR-FTIR, in the region of 1300-900 cm-1, as it proved to be more environmentally friendly, faster, and cheaper than the GC-FID method.
after - ftir和uv-vis技术在生物柴油洗涤废水中甲醇分析中的应用
生物柴油工业废水中存在的甲醇可能成为大气污染物和废水的环境负担。本文提出了ATR-FTIR和UV-Vis两种光谱方法的发展和性能评价,用于鉴别和定量水介质中的甲醇。两种方法均具有良好的线性检测效果,检测系数(r2)均为0.99,工作范围宽,相对标准偏差(RSD) < 12%。在ATR-FTIR方法中,检测限和定量限分别为0.064和0.128% m V-1。紫外可见法的下限分别为0.005 m V-1和0.008% m V-1。最后,这些方法成功地用于快速、灵敏地定量生物柴油洗涤废水中存在的甲醇,浓度范围为0.008-0.641% m V-1。因此,我们证明了光谱方法在鉴别和定量水溶液中甲醇的质量控制中的可行性,具有应用于生物柴油生产行业和研究实验室的潜力。主要是通过ATR-FTIR,在1300-900 cm-1范围内,因为它被证明比GC-FID方法更环保,更快,更便宜。
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来源期刊
Quimica Nova
Quimica Nova 化学-化学综合
CiteScore
1.60
自引率
12.50%
发文量
72
审稿时长
2-4 weeks
期刊介绍: Química Nova publishes in portuguese, spanish and english, original research articles, revisions, technical notes and articles about education in chemistry. All the manuscripts submitted to QN are evaluated by, at least, two reviewers (from Brazil and abroad) of recognized expertise in the field of chemistry involved in the manuscript. The Editorial Council can be eventually asked to review manuscripts. Editors are responsible for the final edition of QN.
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