What does this research mean for the field?

Calcination of diatomaceous earth at temperatures up to 500 °C enhances its adsorbent properties for methylene blue dye, while higher temperatures (1000 °C) significantly reduce its adsorption capacity. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to understand how different calcination temperatures affect the structure and adsorbent properties of biogenic silica.

March 6, 2026Open Access

Effect of Temperature on the Structure, Morphology, Texture and Adsorbent Properties of a Biogenic Silica

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Authors

GRGrey Cecilia Castellar Ortega¹, Yazmín Yaneth Agámez Pertuz², Nubia Edith Céspedes Prieto³, Eduard Ricardo Romero Malagón4, Luis Carlos Moreno Aldana5, Jesús Sigifredo Valencia Ríos6Universidad Nacional de Colombia

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Implication

Research evaluates temperature effects on adsorbent properties in biogenic silica, highlighting implications for dye removal.

Key Points

This research aims to understand how different calcination temperatures affect the structure and adsorbent properties of biogenic silica.
Evaluated calcination temperatures from 200 to 1000 °C for 6 hours in an air atmosphere.
Measured crystalline phases, morphology, and adsorbent properties using X-ray diffraction and adsorption isotherms.
Analyzed the maximum adsorption capacity for methylene blue dye.
Utilized the Langmuir isotherm model for data fitting.
Adsorption capacity for methylene blue decreased from 58.5 mg g-1 (crude) to 6.81 mg g-1 (1000 °C).
X-ray diffraction showed preservation of quartz while clay reflections disappeared at higher temperatures.
Surface area increased from 45.2 m2g-1 to 53.8 m2g-1 at 500 °C.
The diatomaceous earth maintained mesoporosity and thermal stability despite reduced adsorbent capacity.

Cite This Study

Grey Cecilia Castellar Ortega¹, Yazmín Yaneth Agámez Pertuz², Nubia Edith Céspedes Prieto³, Eduard Ricardo Romero Malagón4, Luis Carlos Moreno Aldana5, Jesús Sigifredo Valencia Ríos6 (2026) studied this question.

synapsesocial.com/papers/69aa710d531e4c4a9ff5b591 https://doi.org/10.5281/zenodo.18866819

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Effect of Temperature on the Structure, Morphology, Texture and Adsorbent Properties of a Biogenic Silica

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Cite This Study

Effect of Temperature on the Structure, Morphology, Texture and Adsorbent Properties of a Biogenic Silica

Discussion

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Implication

Key Points

Cite This Study

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