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Infrared studies and mineral element analysis of the leaf of Vernonia amygdalina

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Duru J. A., Duru C. E.

World News of Natural Sciences

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2017

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tom 13

Used in traditional medicine, infrared characterization of column eluates and elemental analysis of V. amygdalina was carried out to establish preliminary views of the chemical and mineral element composition of the leaf of this plant. In the five pure eluates obtained, we found that they contained saturated aliphatic esters, nitro-groups conjugated with benzene ring, secondary amines/nitrogen heterocycles, 1,3-disubstituted benzene and oxazine/oxazoline fragments, respectively. Moreover, we established that potassium, magnesium and sodium were the major minerals in the leaf, while copper, zinc, iron, nickel, manganese and chromium occurred in trace amounts. Research attention should therefore be focused on this plant for the full exploration and exploitation of its obvious antibiotic and mineral values.

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Adsorption capacity of maize biomass parts in the remediation of Cu2+ ion polluted water

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Duru C. E., Duru I. A.

World News of Natural Sciences

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2017

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tom 12

We investigated the efficiency of maize biomass parts - seed chaff, stalk, cob and husk, in the remediation of Cu2+ ion polluted water in modeled solutions. The adsorption capacity of these parts followed the order of husk > stalk > cob > seed chaff, with values of 9.65 mg/g, 4.83 mg/g, 3.70 mg/g and 2.48 mg/g, respectively. Maximum adsorption capacity of each part was reached in 45 min. Herein, the husk giving the best removal efficiency of 80.80%. Characterization of the maize husk using PIXE showed that potassium is the main cation on this biomass, with concentration 5.602 g/kg. FTIR scans of the husk before and after adsorption of Cu2+ ions gave shifts in adsorption bands on - OH carrying molecules, indicating that complexation is a mechanism in the metal ion removal process. The multi porous structure of the husk, and uniform surface coverage by ions observed from SEM images before and after adsorption, shed more light on the high adsorption efficiency shown by this natural waste material.

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Storage and its effect on chemical quality indicators in sachet water brands sold in Owerri Municipal, Imo State, Nigeria

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Duru C. E., Amadi U. S., Enyoh C. E.

World News of Natural Sciences

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2017

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tom 12

This study investigated the effect of storage on certain sachet water quality indicators over a twelve-week period. Three brands of sachet water were collected within 24 h of production and analyzed for pH, nitrate, phosphate and dissolved oxygen. These were then placed in normal storage. According to out results, pH values increased significantly in all brands after week 8. Moreover, nitrate and dissolved oxygen values decreased throughout the investigation period, while phosphate values increased in all brands tested. All tested brands showed various degree of variation over the period of study. Still, all brands analyzed were within permissible limit by World Health Organization (WHO) stipulations. However, continuous storage can significantly alter the chemical quality indicators to a level that exceeds the limit set by WHO; hence, becoming harmful to human health. Therefore, it is recommended that sachet water should not be stored for more than 12 weeks from the date of production.

Ograniczanie wyników

3 World News of Natural Sciences

3 Duru C. E.

1 Amadi U. S.

1 Duru I. A.

1 Duru J. A.

1 Enyoh C. E.

3 2017

Infrared studies and mineral element analysis of the leaf of Vernonia amygdalina

Adsorption capacity of maize biomass parts in the remediation of Cu2+ ion polluted water

Storage and its effect on chemical quality indicators in sachet water brands sold in Owerri Municipal, Imo State, Nigeria