The adsorption of organic dyes using Diatomite from Phu Yen

Tuan Nguyen Minh, Cam Le Minh, Oanh Trinh Thi Kim, Ha Nguyen Thi Thu, Mo Nguyen Thi, Ha Nguyen Ngoc

Abstract


The prevalence of organic dyes contamination in water has driven widespread research on developing effective treatment systems including adsorption using various sorbents. The aim of this study is to investigate the methylene Blue (MB) adsorption of Diatomite Phu Yen and the influence of Fe loading into adsorption capacity. The prepared samples were characterized by XRD, TEM, EDX and BET methods to examine their structural, morphological properties, elemental composition and surface characteristics. Bath adsorption isotherms are conducted at several temperatures (283, 293, 303 and 313K).The data sets are analyzed with Langmuir and Freundlich models which produce Langmuir and Freundlich equilibrium constants (KL, KF), of adsorption for each process. Adsorption kinetics are followed closely the pseudo-second order model. The obtained results show that Diatomite could be an efficient adsorpbent for the removel of organic dyes from polluted environment. The presence of Fe results in negative MB adsorption behavior.

Keywords


Methylene blue; adsorption; Diatomite; Fe loading

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References


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DOI: https://doi.org/10.51316/jca.2021.053

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