El objetivo principal de la presente investigación fue el estudio de la adsorción de fenol, 2-nitrofenol, 4-nitrofenol y 2,4-dinitrofenol con nanofibras de carbono (CNF) como adsorbente mediante el uso de un diseño experimental aplicando el modelo factorial de Box Wilson. El uso de este modelo permitió estudiar el efecto en conjunto de diferentes variables (pH, fuerza iónica y concentración inicial del adsorbato) y encontrar las condiciones óptimas para la adsorción. Las CNF fueron sintetizadas por el método CVD utilizando una mezcla de etileno e hidrógeno en un reactor tubular de lecho fijo empleando un catalizador de Ni/SiO2 por 4h a 873K. El material adsorbente (CNF) fue caracterizado mediante diferentes técnicas instrumentales: ATR, FTIR, DRX, SEM, EDX, sorción de N2, titulación Boehm y pHPZC. El análisis por DRX permitió la determinación de las fases cristalográfica...

El objetivo principal de la presente investigación fue el estudio de la adsorción de fenol, 2-nitrofenol, 4-nitrofenol y 2,4-dinitrofenol con nanofibras de carbono (CNF) como adsorbente mediante el uso de un diseño experimental aplicando el modelo factorial de Box Wilson. El uso de este modelo permitió estudiar el efecto en conjunto de diferentes variables (pH, fuerza iónica y concentración inicial del adsorbato) y encontrar las condiciones óptimas para la adsorción. Las CNF fueron sintetizadas por el método CVD utilizando una mezcla de etileno e hidrógeno en un reactor tubular de lecho fijo empleando un catalizador de Ni/SiO2 por 4h a 873K. El material adsorbente (CNF) fue caracterizado mediante diferentes técnicas instrumentales: ATR, FTIR, DRX, SEM, EDX, sorción de N2, titulación Boehm y pHPZC. El análisis por DRX permitió la determinación de las fases cristalográfica...

The red color is characteristic of the symbols and emblems of Peru. It is not only present in the national flag, but is also characteristic of its national bird (Rupicola peruviana) and flower (Cantua buxifolia). Their color is due to the structural characteristics of organic substances belonging to the family of carotenoids and flavonoids. Apart from their use as colorants and pigments, these compounds also find diverse applications in pharmaceuticals and nutrition due to their antioxidant properties. This review details the specific compounds that give rise to the red color of the most representative plants and animals of Peru. The presence of unique substances not observed in other species is also highlighted.

The 2012 Ig Nobel Prize in Chemistry was awarded to Johan Petterson, a Swedish engineer who discovered that copper was responsible for turning hair green in a little Swedish town. Many green copper compounds used as pigments are present in nature and there are also the hemocyanins, copper-containing proteins found in the blood of some arthropods and mollusks.

The 2012 Ig Nobel Prize in Chemistry was awarded to Johan Petterson, a Swedish engineer who discovered that copper was responsible for turning hair green in a little Swedish town. Many green copper compounds used as pigments are present in nature and there are also the hemocyanins, copper-containing proteins found in the blood of some arthropods and mollusks.

The red color is characteristic of the symbols and emblems of Peru. It is not only present in the national flag, but is also characteristic of its national bird (Rupicola peruviana) and flower (Cantua buxifolia). Their color is due to the structural characteristics of organic substances belonging to the family of carotenoids and flavonoids. Apart from their use as colorants and pigments, these compounds also find diverse applications in pharmaceuticals and nutrition due to their antioxidant properties. This review details the specific compounds that give rise to the red color of the most representative plants and animals of Peru. The presence of unique substances not observed in other species is also highlighted.

The red color is characteristic of the symbols and emblems of Peru. It is not only present in the national flag, but is also characteristic of its national bird (Rupicola peruviana) and flower (Cantua buxifolia). Their color is due to the structural characteristics of organic substances belonging to the family of carotenoids and flavonoids. Apart from their use as colorants and pigments, these compounds also find diverse applications in pharmaceuticals and nutrition due to their antioxidant properties. This review details the specific compounds that give rise to the red color of the most representative plants and animals of Peru. The presence of unique substances not observed in other species is also highlighted.

The 2012 Ig Nobel Prize in Chemistry was awarded to Johan Petterson, a Swedish engineer who discovered that copper was responsible for turning hair green in a little Swedish town. Many green copper compounds used as pigments are present in nature and there are also the hemocyanins, copper-containing proteins found in the blood of some arthropods and mollusks.

This study investigated the removal of dimethylamine (DMA) by an adsorption mechanism using metal-organic frameworks (MOFs). The synthesis of the MOFs was performed by solvothermal methods. The characterization of the MOF obtained was made by attenuated 1 total reflectance spectroscopy (ATR), proton nuclear magnetic resonance spectroscopy ( HNMR), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM). The XRD diffractograms allowed to identify the structure of MOF as Dashkovaite, which has the molecular formula Mg(HCOO) .2H O; while the ATR studies revealed the presence of carbonyl group as most important functional group in the MOF structure. The morphological analysis showed that the MOF crystalline particles had a hexagonal shape, formed from filaments of around 7,5-8 microns in length. Adsorption experiments showed that the MOF had...