Video Experimental Relacionado
Updated: Jan 25, 2026
08:45
Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
Published on: May 10, 2022
2.4K
Biomasa de maíz funcionalizada con quitosano para la adsorción de hierro: Un enfoque verde multidimensional
Mohamed R El-Aassar1, Hassan M A Hassan1, Ebtsam K Alenezy1
1Chemistry Department, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia.
International journal of biological macromolecules
|January 23, 2026
Resumen
Un nuevo bioadsorbente híbrido de Zea mays-quitosano@antracita (MZ-CS@An) elimina eficientemente Fe(II) del agua. Este material ecológico demuestra ser rentable y reutilizable para la purificación sostenible del agua.
Área de la Ciencia:
- Ciencia de Materiales
- Química Ambiental
- Tratamiento de Agua
Sus antecedentes:
- La contaminación por hierro(II) representa riesgos para los ecosistemas acuáticos y la salud humana.
- El desarrollo de adsorbentes sostenibles y rentables es crucial para la purificación del agua.
- Los biomateriales híbridos ofrecen soluciones prometedoras debido a sus propiedades únicas y su respeto por el medio ambiente.
Objetivo del estudio:
- Fabricar y caracterizar un nuevo bioadsorbente híbrido ecológico, Zea mays-quitosano@antracita (MZ-CS@An).
- Investigar el rendimiento de adsorción de MZ-CS@An para la eliminación de Fe(II) de soluciones acuosas.
- Optimizar las condiciones de adsorción y evaluar la rentabilidad y reutilización del material.
Principales métodos:
- Fabricación de MZ-CS@An utilizando quitosano, antracita y Zea mays activada.
- Caracterización fisicoquímica mediante espectroscopía XRD, FTIR, BET, TG/DTG, FESEM, EDX y Raman.
- Optimización de los parámetros de adsorción (concentración de Fe(II), dosis de adsorbente, tiempo de contacto) utilizando el Diseño Box-Behnken (BBD).
- Estudios cinéticos, de isoterma y termodinámicos para dilucidar el mecanismo de adsorción.
Principales resultados:
- MZ-CS@An exhibió características estructurales robustas y alta funcionalidad superficial.
- El proceso de adsorción se optimizó, y los modelos de cinética de pseudo-segundo orden y de isoterma de Jossens proporcionaron el mejor ajuste.
- Se identificó la fisiosorción como el mecanismo dominante, siendo la adsorción espontánea y endotérmica.
- Se lograron bajos costos de producción (0,09 $/kg/ciclo) y alta eficiencia (84,87 µg/100 L).
- El adsorbente mantuvo una alta eficiencia de eliminación durante cinco ciclos de regeneración.
Conclusiones:
- MZ-CS@An es un adsorbente altamente eficaz, sostenible y rentable para la eliminación de Fe(II).
- El material biohíbrido demuestra un potencial significativo para aplicaciones prácticas en la purificación del agua.
- El estudio destaca las ventajas del uso de materiales de base biológica en la remediación ambiental.
Videos de Conceptos Relacionados
01:21Green Algae
756
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
756
01:20Frustration and Conflict: Approach-Approach, Approach-Avoidance
502
Frustration occurs when people are obstructed or prevented from achieving a desired goal or fulfilling a perceived need. For example, when someone's input is ignored in a discussion, it can lead to feelings of frustration. Conflict, however, arises from opposing interests, goals, or actions. Conflicts can take various forms based on the nature of these opposing desires or goals.
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
502
02:45Functional Groups
88.0K
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
88.0K
02:45Functional Groups
24.3K
24.3K
01:30Information Processing Approach
549
The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is...
549
01:20Actuarial Approach
297
The actuarial approach, a statistical method originally developed for life insurance risk assessment, is widely used to calculate survival rates in clinical and population studies. This method accounts for participants lost to follow-up or those who die from causes unrelated to the study, ensuring a more accurate representation of survival probabilities.
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
297