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Special Issue "Chemical Speciation of Organic and Inorganic components of Environmental and Biological Interest in Natural Fluids: Behaviour, Interaction and Sequestration"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".

Deadline for manuscript submissions: 30 September 2019

Special Issue Editors

Guest Editor
Prof. Dr. Francesco Crea

Dipartimento di Scienze Chimiche, Università di Messina, Viale Ferdinando Stagno d'Alcontres, 31, I-98166 Messina (Vill. S. Agata), Italy
Website | E-Mail
Interests: speciation of polyelectrolytes; acid-base properties and complexing ability towards different classes of organic and inorganic ligands; modelling in HPLC; modelling of separation of linear and branched polyamines by IC chromatography; speciation of UO22+ in different ionic media; interaction with carboxylic acids at low molecular weight and formation of hydrolytic hetero-metal species; determination of the solubility and activity coefficients of different classes of organic ligands in different ionic media
Guest Editor
Prof. Dr. Alberto Pettignano

Dipartimento di Fisica e Chimica, Università di Palermo, Viale delle Scienze, I-90128 Palermo, Italy
E-Mail
Interests: speciation of ligands of biological and environmental interest; acid-base properties and complexation ability of natural and synthetic polyelectrolytes; removal/recovery of toxic or precious metals by means of biocompatible materials; electrochemical techniques; spectroscopic techniques; calorimetric techniques

Special Issue Information

Dear Colleagues,

The chemical speciation of elements in natural waters and biological fluids is a key topic, essential for discussing the chemical reactivity of constituents in these systems. It is well understood that it is the chemical form of a metal or metalloids that conditions its reactivity, life time and fate in the environment. The chemical speciation is also important from a geochemical and toxicological point of view, since it gives essential information on the geochemical behavior of chemical species and on the biological availability and toxicity of elements. The knowledge of speciation is critical to understand the transport, accumulation, bioavailability and toxicity of elements within and between the environmental compartments of air, soil, water, sediments and biota.

We invite researchers to contribute with original articles or reviews that can give an update on the knowledge of chemical speciation of the main and trace organic and inorganic components of natural waters and biological fluids. Potential topics include:

  • Papers that lead with chemical speciation or coordination chemistry of organic and inorganic components in aqueous solutions;
  • Study of interactions of metals and ligands in aqueous solution simulating the composition of the natural waters, and determination of the thermodynamic aqueous parameters;
  • Speciation analysis with new hyphenated techniques;
  • Sequestration or removal of pollutants and potential remediation techniques.

 Prof. Dr. Francesco Crea
Prof. Dr. Alberto Pettignano
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • speciation analysis
  • sequestration ability
  • equilibrium constants
  • ligand classes
  • models
  • natural fluids
  • sediments
  • soils

Published Papers (2 papers)

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Research

Open AccessArticle Analysis of Hazardous Elements in Children Toys: Multi-Elemental Determination by Chromatography and Spectrometry Methods
Molecules 2018, 23(11), 3017; https://doi.org/10.3390/molecules23113017 (registering DOI)
Received: 23 October 2018 / Revised: 12 November 2018 / Accepted: 15 November 2018 / Published: 19 November 2018
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Abstract
This paper presents the results of determination of hazardous metal (Cd, Cu, Cr, Hg, Mn, Ni, Pb, Zn) and metalloid (As, Sb) levels in toys available in the Polish market. Two independent sample preparation methods were used to determine the concentration and content
[...] Read more.
This paper presents the results of determination of hazardous metal (Cd, Cu, Cr, Hg, Mn, Ni, Pb, Zn) and metalloid (As, Sb) levels in toys available in the Polish market. Two independent sample preparation methods were used to determine the concentration and content of the metals and metalloids. The first one is defined by the guidelines of the EN-71 standard and undertook extraction in 0.07 mol/L HCl. This method was used to conduct speciation analysis of Cr(III) and Cr(VI), as well as for the determination of selected metals and metalloids. The second method conducted mineralization in a HNO3 and H2O2 mixture using microwave energy to determine the content of metals and metalloids. Determination of chromium forms was made using the high-performance liquid chromatography inductively coupled plasma mass spectrometry (HPLC-ICP-MS) method, while those of metals and metalloids were made using the ICP-MS technique. Additionally, in order to determine total content of chromium in toys, an energy dispersive X-ray fluorescence spectrometer (EDX) was used. The results of the analyses showed that Cr(VI) was not detected in the toys. In general, the content of heavy metals and metalloids in the studied samples was below the migration limit set by the norm EN-71. Full article
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Open AccessArticle Evaluation of Highly Detectable Pesticides Sprayed in Brassica napus L.: Degradation Behavior and Risk Assessment for Honeybees
Molecules 2018, 23(10), 2482; https://doi.org/10.3390/molecules23102482
Received: 27 August 2018 / Revised: 13 September 2018 / Accepted: 21 September 2018 / Published: 27 September 2018
PDF Full-text (1842 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
Honeybees are major pollinators of agricultural crops and many other plants in natural ecosystems alike. In recent years, managed honeybee colonies have decreased rapidly. The application of pesticides is hypothesized to be an important route leading to colony loss. Herein, a quick, easy,
[...] Read more.
Honeybees are major pollinators of agricultural crops and many other plants in natural ecosystems alike. In recent years, managed honeybee colonies have decreased rapidly. The application of pesticides is hypothesized to be an important route leading to colony loss. Herein, a quick, easy, cheap, effective, rugged, and safe (QuEChERS) method was used to determine eight highly detectable pesticides (carbendazim, prochloraz, pyrimethanil, fenpropathrin, chlorpyrifos, imidacloprid, thiamethoxam, and acetamiprid) in rape flowers. A field experiment was conducted at the recommended dose to evaluate the contact exposure risk posed to honeybees for 0–14 days after treatment. The initial residue deposits of neonicotinoids and fungicides among these compounds were 0.4–1.3 mg/kg and 11.7–32.3 mg/kg, respectively, and 6.4 mg/kg for fenpropathrin and 4.2 mg/kg for chlorpyrifos. The risk was quantified using the flower hazard quotient (FHQ) value. According to the data, we considered imidacloprid, thiamethoxam, chlorpyrifos, fenpropathrin, and prochloraz to pose an unacceptable risk to honeybees after spraying in fields, while fungicides (carbendazim and pyrimethanil) and acetamiprid posed moderate or acceptable risks to honeybees. Therefore, acetamiprid can be used instead of imidacloprid and thiamethoxam to protect rape from some insects in agriculture, and the application of prochloraz should be reduced. Full article
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Graphical abstract

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