Improved fixed bed models for correlating asymmetric adsorption breakthrough curves
نویسندگان
چکیده
Abstract Breakthrough curves of water contaminants are usually analyzed using simple fixed bed models such as the Bohart-Adams, Thomas, and Yoon-Nelson equations, which by design symmetric. Because breakthrough data often follow an asymmetric pattern, use that do not account for asymmetry could lead to poor fits, consequently resulting in erroneous estimates exhaustion times. To address this issue, were modified a logarithmic transformation enhance their fitting ability. The three found capable providing robust fits seven separate sets previously reported (fluoride, methylene blue, salicylic acid, lead, mercury, nickel, arsenic), with residual root mean square error (RRMSE) values ranging from 0.019 0.046. In consequence, new reliable times corresponding any predetermined concentration level. By contrast, original perform poorly, reporting inferior RRMSE 0.038 0.086 grossly inaccurate contain only parameters appear models, highly flexible, being able assume virtually all monotonically increasing sigmoid shapes. They represent far more accurate alternative models.
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ژورنال
عنوان ژورنال: Journal of water process engineering
سال: 2021
ISSN: ['2214-7144']
DOI: https://doi.org/10.1016/j.jwpe.2020.101810