1
|
Binding of Arsenic by Common Functional Groups: An Experimental and Quantum-Mechanical Study. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12063210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Arsenic is a well-known contaminant present in different environmental compartments and in human organs and tissues. Inorganic As(III) represents one of the most dangerous arsenic forms. Its toxicity is attributed to its great affinity with the thiol groups of proteins. Considering the simultaneous presence in all environmental compartments of other common functional groups, we here present a study aimed at evaluating their contribution to the As(III) complexation. As(III) interactions with four (from di- to hexa-) carboxylic acids, five (from mono- to penta-) amines, and four amino acids were evaluated via experimental methods and, in simplified systems, also by quantum-mechanical calculations. Data were analyzed also with respect to those previously reported for mixed thiol-carboxylic ligands to evaluate the contribution of each functional group (-SH, -COOH, and -NH2) toward the As(III) complexation. Formation constants of As(III) complex species were experimentally determined, and data were analyzed for each class of ligand. An empirical relationship was reported, taking into account the contribution of each functional group to the complexation process and allowing for a rough estimate of the stability of species in systems where As(III) and thiol, carboxylic, or amino groups are involved. Quantum-mechanical calculations allowed for the evaluation and the characterization of the main chelation reactions of As(III). The potential competitive effects of the investigated groups were evaluated using cysteine, a prototypical species possessing all the functional groups under investigation. Results confirm the higher binding capabilities of the thiol group under different circumstances, but also indicate the concrete possibility of the simultaneous binding of As(III) by the thiol and the carboxylic groups.
Collapse
|
2
|
Bretti C, Cardiano P, Cigala RM, De Stefano C, Irto A, Lando G, Sammartano S. Exploring various ligand classes for the efficient sequestration of stannous cations in the environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 643:704-714. [PMID: 29957435 DOI: 10.1016/j.scitotenv.2018.06.241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/11/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
Metal pollution, coming from both natural and anthropogenic sources, has become one of the most serious environmental problems. Various strategies have been tested with the aim of removing heavy metals from environment. In this contribution, containing a robust experimental work together with a critical literature analysis, the sequestering ability of a variety of ligands towards Sn2+ cation will be evaluated in the conditions of several natural fluids, i.e. sea water, fresh water, human blood plasma, urine and saliva. 13 structural and 11 thermodynamic descriptors will be selected for a total of thirty-eight molecules belonging to different classes (carboxylic acids, amines, amino acids, phosphonates, polyelectrolytes etc. …). For the filling of those missing data relative to the 11 thermodynamic descriptors, different strategies will be adopted, including simple correlations and Nipals algorithm. The evaluation of the sequestering ability of the ligands is assessed in terms of estimation of pL0.5 (total concentration of ligand required to bind the 50% of metal in solution), an empirical parameter that takes into account all the side reactions in solutions and does not depend on the speciation scheme. Partial least square calculations were performed to model the pL0.5 and to determine its correlation with the abovementioned descriptors. The possibility to design and build up new tailor-made molecules capable of effectively sequester Sn2+ in various conditions is crucial for practical applications in biosphere, hydrosphere and lithosphere.
Collapse
Affiliation(s)
- Clemente Bretti
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Paola Cardiano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Rosalia Maria Cigala
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Concetta De Stefano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Anna Irto
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Gabriele Lando
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy.
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| |
Collapse
|
3
|
Cardiano P, De Stefano C, Foti C, Giacobello F, Giuffrè O, Sammartano S. Sequestration of HEDPA , NTA and phosphonic NTA derivatives towards Al 3+ in aqueous solution. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
4
|
Cardiano P, Foti C, Giacobello F, Giuffrè O, Sammartano S. Study of Al 3+ interaction with AMP, ADP and ATP in aqueous solution. Biophys Chem 2018; 234:42-50. [PMID: 29407770 DOI: 10.1016/j.bpc.2018.01.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 12/24/2022]
Abstract
The interaction of Al3+ and nucleotide ligands, namely adenosine-5'-monophosphate, (AMP), adenosine-5'-diphosphate, (ADP), adenosine-5'-triphosphate, (ATP), has been studied in aqueous solution at T = 298.15 K and I = 0.15 mol L-1 in NaCl (only for Al3+-ATP system at I = 0.1 mol L-1). Formation constants and speciation models for the species formed are discussed on the basis of potentiometric results. The speciation models found for the three systems include ML and ML2 species in all the cases, and for Al3+-ADP and ATP systems, MLH, MLOH and ML2OH species as well. The formation constant value for ML species shows the trend, AMP < ADP < ATP. 1H NMR spectroscopy was also employed for the study of Al3+-ATP system. The 1H NMR results are in agreement with the speciation model obtained from analysis of potentiometric titration data, confirming the stabilities of the main species. Enthalpy change values were obtained by titration calorimetry; for the main Al3+-ATP species (at T = 298.15 K and I = 0.1 mol L-1 in NaCl), they resulted always higher than zero, as typical for hard-hard interactions. The dependence of formation constants on ionic strength over the range I = 0.1 to 1 mol L-1 in NaCl is also reported for Al3+-ATP system. The sequestering ability of the nucleotides under study towards Al3+ was also evaluated by the empirical parameter pL0.5.
Collapse
Affiliation(s)
- Paola Cardiano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Claudia Foti
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Fausta Giacobello
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Ottavia Giuffrè
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy.
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| |
Collapse
|
5
|
Cataldo S, Lando G, Milea D, Orecchio S, Pettignano A, Sammartano S. A novel thermodynamic approach for the complexation study of toxic metal cations by a landfill leachate. NEW J CHEM 2018. [DOI: 10.1039/c7nj04456a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The leachate humic fraction is a good sequestering agent towards toxic metal ions, influencing their aqueous solution behaviour and their environmental impact.
Collapse
Affiliation(s)
- Salvatore Cataldo
- Dipartimento di Fisica e Chimica
- Università di Palermo
- Viale delle Scienze
- I-90128 Palermo
- Italy
| | - Gabriele Lando
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università degli Studi di Messina
- I-98166 Messina
| | - Demetrio Milea
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università degli Studi di Messina
- I-98166 Messina
| | - Santino Orecchio
- Dipartimento di Scienze e Tecnologie Biologiche
- Chimiche e Farmaceutiche
- Università di Palermo
- Palermo
- Italy
| | - Alberto Pettignano
- Dipartimento di Fisica e Chimica
- Università di Palermo
- Viale delle Scienze
- I-90128 Palermo
- Italy
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università degli Studi di Messina
- I-98166 Messina
| |
Collapse
|
6
|
Cardiano P, Cigala RM, Cordaro M, De Stefano C, Milea D, Sammartano S. On the complexation of metal cations with “pure” diethylenetriamine-N,N,N′,N′′,N′′-pentakis(methylenephosphonic) acid. NEW J CHEM 2017. [DOI: 10.1039/c7nj00118e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexation of various metal cations by DTPMA obtained by an efficient synthetic procedure has been investigated, assessing its sequestering ability and speciation in real systems.
Collapse
Affiliation(s)
- Paola Cardiano
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 98166 Messina
| | - Rosalia Maria Cigala
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 98166 Messina
| | - Massimiliano Cordaro
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 98166 Messina
| | - Concetta De Stefano
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 98166 Messina
| | - Demetrio Milea
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 98166 Messina
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 98166 Messina
| |
Collapse
|
7
|
Cardiano P, Giacobello F, Giuffrè O, Sammartano S. Thermodynamics of Al3+-thiocarboxylate interaction in aqueous solution. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.077] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
8
|
Crea F, De Stefano C, Foti C, Lando G, Milea D, Sammartano S. Alkali Metal Ion Complexes with Phosphates, Nucleotides, Amino Acids, and Related Ligands of Biological Relevance. Their Properties in Solution. Met Ions Life Sci 2016; 16:133-66. [PMID: 26860301 DOI: 10.1007/978-3-319-21756-7_5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Alkali metal ions play very important roles in all biological systems, some of them are essential for life. Their concentration depends on several physiological factors and is very variable. For example, sodium concentrations in human fluids vary from quite low (e.g., 8.2 mmol dm(-3) in mature maternal milk) to high values (0.14 mol dm(-3) in blood plasma). While many data on the concentration of Na(+) and K(+) in various fluids are available, the information on other alkali metal cations is scarce. Since many vital functions depend on the network of interactions occurring in various biofluids, this chapter reviews their complex formation with phosphates, nucleotides, amino acids, and related ligands of biological relevance. Literature data on this topic are quite rare if compared to other cations. Generally, the stability of alkali metal ion complexes of organic and inorganic ligands is rather low (usually log K < 2) and depends on the charge of the ligand, owing to the ionic nature of the interactions. At the same time, the size of the cation is an important factor that influences the stability: very often, but not always (e.g., for sulfate), it follows the trend Li(+) > Na(+) > K(+) > Rb(+) > Cs(+). For example, for citrate it is: log K ML = 0.88, 0.80, 0.48, 0.38, and 0.13 at 25 °C and infinite dilution. Some considerations are made on the main aspects related to the difficulties in the determination of weak complexes. The importance of the alkali metal ion complexes was also studied in the light of modelling natural fluids and in the use of these cations as probes for different processes. Some empirical relationships are proposed for the dependence of the stability constants of Na(+) complexes on the ligand charge, as well as for correlations among log K values of NaL, KL or LiL species (L = generic ligand).
Collapse
Affiliation(s)
- Francesco Crea
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Concetta De Stefano
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Claudia Foti
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Gabriele Lando
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Demetrio Milea
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres, 31, I-98166, Messina, Italy.
| |
Collapse
|
9
|
Bretti C, Cigala RM, De Stefano C, Lando G, Sammartano S. Understanding the bioavailability and sequestration of different metal cations in the presence of a biodegradable chelant S,S-EDDS in biological fluids and natural waters. CHEMOSPHERE 2016; 150:341-356. [PMID: 26921587 DOI: 10.1016/j.chemosphere.2016.02.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/01/2016] [Accepted: 02/05/2016] [Indexed: 06/05/2023]
Abstract
Ethylenediamine-N,N'-disuccinic acid is a biodegradable alternative to EDTA, therefore its use for the sequestration of Ca(2+), Sn(2+), Cu(2+), Zn(2+) and Fe(3+) is analyzed. New data on its binding ability towards these cations were obtained with potentiometric, voltammetric and calorimetric measurements at different ionic strengths and at T = 298.15 K. Real multi-component fluids, namely fresh water, urine, sea water, saliva and blood plasma were chosen as case studies to evaluate the sequestering ability of EDDS in comparison with EDTA. Speciation diagrams were drawn in selected conditions, considering all interactions among the "natural" components of the fluid and those studied in this work, EDDS and EDTA (cL = 1 mmol dm(-3)) as sequestering agents and the cited metal cations (cM ∼ 10(-5) mol dm(-3)). The comparison of the sequestering ability of EDDS and EDTA is done using pM and pL0.5. In blood plasma the plasma mobilizing index was adopted. It was found that EDDS is a good alternative to EDTA, which tends to bind Ca(2+) and Mg(2+) more than EDDS. In particular, EDTA cannot be used as a sequestrant for Sn(2+) when cCa > cEDTA. EDDS is more efficient than EDTA at pH < 8, particularly in urine, where carbonate is absent. In sea water, the sequestering ability of EDDS towards Fe(3+) is higher than that of EDTA. In blood plasma, the PMI of EDDS towards Cu(2+) is higher than that of EDTA. Thermodynamic information, in terms of ΔH and ΔS, for the protonation and metal complex formation reactions are reported.
Collapse
Affiliation(s)
- Clemente Bretti
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina, Viale Ferdinando Stagno d'Alcontres, 31, I-98166 Messina, Vill. S. Agata, Italy.
| | - Rosalia Maria Cigala
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina, Viale Ferdinando Stagno d'Alcontres, 31, I-98166 Messina, Vill. S. Agata, Italy.
| | - Concetta De Stefano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina, Viale Ferdinando Stagno d'Alcontres, 31, I-98166 Messina, Vill. S. Agata, Italy.
| | - Gabriele Lando
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina, Viale Ferdinando Stagno d'Alcontres, 31, I-98166 Messina, Vill. S. Agata, Italy.
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università degli Studi di Messina, Viale Ferdinando Stagno d'Alcontres, 31, I-98166 Messina, Vill. S. Agata, Italy.
| |
Collapse
|
10
|
De Stefano C, Foti C, Giuffrè O, Milea D. Complexation of Hg2+, CH3Hg+, Sn2+ and (CH3)2Sn2+ with phosphonic NTA derivatives. NEW J CHEM 2016. [DOI: 10.1039/c5nj02531a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Replacing carboxylic with phosphonic groups in NTA significantly affects the sequestering ability toward Hg2+, CH3Hg+, Sn2+ and (CH3)2Sn2+.
Collapse
Affiliation(s)
- Concetta De Stefano
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 31 – 98166 Messina
| | - Claudia Foti
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 31 – 98166 Messina
| | - Ottavia Giuffrè
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 31 – 98166 Messina
| | - Demetrio Milea
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche ed Ambientali
- Università di Messina
- 31 – 98166 Messina
| |
Collapse
|
11
|
Crea F, De Stefano C, Milea D, Pettignano A, Sammartano S. SALMO and S3M: A Saliva Model and a Single Saliva Salt Model for Equilibrium Studies. Bioinorg Chem Appl 2015; 2015:267985. [PMID: 25733975 PMCID: PMC4334860 DOI: 10.1155/2015/267985] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 01/14/2015] [Indexed: 11/18/2022] Open
Abstract
A model of synthetic saliva (SALMO, SALiva MOdel) is proposed for its use as standard medium in in vitro equilibrium and speciation studies of real saliva. The concentrations come out from the literature analysis of the composition of both real saliva and synthetic saliva. The chief interactions of main inorganic components of saliva, as well as urea and amino acids, are taken into account on the basis of a complex formation model, which also considers the dependence of the stability constants of these species on ionic strength and temperature. These last features allow the modelling of the speciation of saliva in different physiological conditions deriving from processes like dilution, pH, and temperature changes. To simplify equilibrium calculations, a plain approach is also proposed, in order to take into account all the interactions among the major components of saliva, by considering the inorganic components of saliva as a single 1 : 1 salt (MX), whose concentration is c MX = (1/2)∑c i (c i = analytical concentration of all the ions) and z ion charge calculated as z=±(I/c MX)(1/2) = ±1.163. The use of the Single Saliva Salt Model (S3M) considerably reduces the complexity of the systems to be investigated. In fact, only four species deriving from internal ionic medium interactions must be considered.
Collapse
Affiliation(s)
- Francesco Crea
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Concetta De Stefano
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Demetrio Milea
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Alberto Pettignano
- Dipartimento di Fisica e Chimica, Università di Palermo, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy
| | - Silvio Sammartano
- Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| |
Collapse
|