Chemical speciation: an instrument for evaluation of mineral bioavailability

Reis, Luana Sarpa; Gonçalves, Édira Castello Branco de Andrade

doi:10.1590/0103-8478cr20131596

Cited by 6 publications

(3 citation statements)

References 27 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A coupled separation device (liquid chromatography equipment is the most popular) for detecting the sensitivity to silicon compounds enables research on silicon speciation. Chemical speciation deals with the identification and quantification of the distribution of elements in a sample [180]. Silicon can be present in many chemical forms, especially in plant tissues.…”

Section: Silicon Speciationmentioning

confidence: 99%

Comprehensive Study of Si-Based Compounds in Selected Plants (Pisum sativum L., Medicago sativa L., Triticum aestivum L.)

et al. 2023

View full text Add to dashboard Cite

This review describes the role of silicon (Si) in plants. Methods of silicon determination and speciation are also reported. The mechanisms of Si uptake by plants, silicon fractions in the soil, and the participation of flora and fauna in the Si cycle in terrestrial ecosystems have been overviewed. Plants of Fabaceae (especially Pisum sativum L. and Medicago sativa L.) and Poaceae (particularly Triticum aestivum L.) families with different Si accumulation capabilities were taken into consideration to describe the role of Si in the alleviation of the negative effects of biotic and abiotic stresses. The article focuses on sample preparation, which includes extraction methods and analytical techniques. The methods of isolation and the characterization of the Si-based biologically active compounds from plants have been overviewed. The antimicrobial properties and cytotoxic effects of known bioactive compounds obtained from pea, alfalfa, and wheat were also described.

show abstract

Section: Silicon Speciationmentioning

confidence: 99%

Comprehensive Study of Si-Based Compounds in Selected Plants (Pisum sativum L., Medicago sativa L., Triticum aestivum L.)

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Neither are these procedures sufficient to assess the bioavailability of nutrients from fertilizers. Therefore, to be able to better evaluate effects of different environmental conditions on bioavailability and mobility of different contaminants, sequential extraction methods have been widely used with different environmental samples during the last few decades [21][22][23][24]. In the sequential extraction procedure, different chemical reagents are applied to the sample in a series and each successive treatment is more drastic than the previous one.…”

Section: Introductionmentioning

confidence: 99%

New Nitrogen-Containing Recycled Fertilizers: Bioavailability of Nutrients and Harmful Elements

Pesonen

Rautio

2019

Recycling

View full text Add to dashboard Cite

Environmental policies of the European Union aim to increase recycling and re-use of waste-streams. One of the economically most profitable ways of re-using waste is to use it as a fertilizer. In this study, recycled nitrogen fertilizers were manufactured from industrial side-streams (sawdust, fly-ash, ammonium sulfate and lignosulfonate). A sequential extraction procedure was applied to all the products tested in this paper to make sure that the environmental requirements of a recycled fertilizer would be fulfilled. A mass fraction of up to 7.0% of nitrogen was achieved with sawdust granule and 7.2% with fly-ash-sawdust granule, indicating that the granules would be well suited to be used as nitrogen-containing fertilizers. Nitrogen release from sawdust granule was more controlled than from commercial salpetre. Sawdust combined with fly-ash can hence give a balanced nutrient mix when used together. Bioavailabilities and pseudo-total contents of harmful elements (As, Cd, Cr, Cu, Ni, Pb, and Zn) were small in all granules and cause no harm in field or forest fertilizer use.

show abstract

“…However, little information exists on chemical speciation of food substances and food crops sample [8].…”

Section: Introductionmentioning

confidence: 99%

Speciation of Metals and Risk Assessment in Selected Food Crop Samples Grown in Ohaji/Egbema LGA, Imo State, Nigeria

Wirnkor¹,

Ngozi²,

Obinna³

et al. 2017

J Environ Anal Chem

View full text Add to dashboard Cite

Ohaji Egbema is known for its oil production and exploration activities and so crops grown in this area could be contaminated. Chemical speciation was carried out on four commonly grown food crops in the area so as to determine the level of metal contamination. The samples were analyzed sequentially and the metal species in the extract determined by ASS. Results revealed that mean concentrations of all studied metals to fall within the WHO/FAO permissible limits. Significant bioavailability was observed for Pb in Okoro (0.67) and Orange (0.7). Zn showed the highest concentration and its bioavailability was highest for Okoro (12.6)>Pawpaw (7.9)>Orange (5.5)>Cassava (0.28). The sum of EDI for both adult and children exhibited similar trend with Cassava having the least value in both adult and children. Though metals showed low values of EDI, excessive consumption can have adverse effect in humans due to bioaccumulation in living system. Hazard Quotient (HQ) was highest for Pb (3.524) in Pawpaw for children while Fe (0.705) was highest in Pawpaw for adult. Generally, HQ was found to be highest in children for all the metals indicating great health risk for children. Risk associated with consuming these four fruit crops in terms of summation of RAC revealed the order of decrease to be: Okoro (1620)>Pawpaw (1021)>Orange (861)>Cassava (178). This study has shown that the consumption of these fruit crops could be a great health risk for children.

show abstract

Chemical speciation: an instrument for evaluation of mineral bioavailability

Abstract: Chemical speciation allows knowing the the different chemical forms of metals in a sample

Cited by 6 publications

References 27 publications

Comprehensive Study of Si-Based Compounds in Selected Plants (Pisum sativum L., Medicago sativa L., Triticum aestivum L.)

Comprehensive Study of Si-Based Compounds in Selected Plants (Pisum sativum L., Medicago sativa L., Triticum aestivum L.)

New Nitrogen-Containing Recycled Fertilizers: Bioavailability of Nutrients and Harmful Elements

Speciation of Metals and Risk Assessment in Selected Food Crop Samples Grown in Ohaji/Egbema LGA, Imo State, Nigeria

Contact Info

Product

Resources

About