Andrea Pozzi - Academia.edu (original) (raw)

Papers by Andrea Pozzi

Scientific Data, 2019

In the original version of the Data Descriptor the surname of author Anne Socquet was misspelled.... more In the original version of the Data Descriptor the surname of author Anne Socquet was misspelled. This has now been corrected in the HTML and PDF versions of the Data Descriptor. Some authors were also not appropriately associated with their affiliations in the HTML version, due to formatting errors made by the publisher. This has now been corrected in the HTML version of the Data Descriptor, the affiliations in the PDF were correct from the time of publication.

Chemosensors

Biochar, a carbon material obtained by pyrolysis of biomasses, is increasingly applied in environ... more Biochar, a carbon material obtained by pyrolysis of biomasses, is increasingly applied in environmental remediation and sensing thanks to its functional properties, cost-effectiveness and eco-friendliness. The adsorption capacity of biochar, strictly dependent on its specific surface area, heteroatom doping and surface functional groups, is crucial for these applications. Here, biochar produced at low temperature (350 °C) from a marine microalga (Nannochloropsis sp.) is proposed as an efficient adsorbent of lead (II) ions in aqueous solution; this production strategy promotes the natural self-doping of biochar without requiring harsh conditions. The kinetics and thermodynamics of the adsorption process, as well as the effect of pH, ionic strength and dissolved organic matter on the adsorption efficiency were systematically assessed. The microalgae-derived biochar shows superior adsorption performances compared to a nutshell-derived one (used as a reference of lignocellulosic feedsto...

Biosensors, 2016

Mercury substitution is a big issue in electroanalysis, and the search for a suitable, and less t... more Mercury substitution is a big issue in electroanalysis, and the search for a suitable, and less toxic, replacement is still under development. Of all the proposed alternatives, bismuth films appear to be the most viable solution, although they are still suffering some drawbacks, particularly the influence of deposition conditions and linearity at low concentrations. In this paper, the most promising strategies for bismuth film deposition on screen-printed electrodes (surface modifications, polymeric film deposition, insoluble salt precursors) will be evaluated for trace metal analysis. Particular attention will be devoted to bismuth chemistry, aiming to rationalize their electroanalytic performance.

Nei giorni 7 – 8 settembre 2001 è stata effettuata una campagna di campionamento di ghiaccio, nev... more Nei giorni 7 – 8 settembre 2001 è stata effettuata una campagna di campionamento di ghiaccio, neve ed acqua superficiale sul ghiacciaio della Marmolada (Dolomiti occidentali) che ha interessato sia la zona di accumulo delle precipitazioni nevose sia quella di ablazione del ghiac-ciaio alle fronti occidentale, centrale ed orientale. Le analisi chimiche, effettuate sia direttamente sul ghiacciaio mediante strumentazione elettroanalitica portatile sia in laboratorio, hanno messo in evidenza le interazioni chimiche che avvengono tra le acque di fusione del ghiaccio e le rocce carbonatiche del bacino, e gli effetti dell'elevato impatto antropico legato all'attività sportiva praticata sul ghiacciaio sia d'inverno sia d'estate. MARM OLADA 44 45 INTRODUZIONE Assetto geografico e geomorfologico Il Massiccio della Marmolada è ubicato nelle Alpi Dolomitiche, al confine tra le province di Belluno e Trento. La linea spartiacque che lo attraversa rappresenta un tratto del displuvi...

Annali di chimica, 2002

High-altitude alpine valleys may be considered as ideal field laboratories for the interdisciplin... more High-altitude alpine valleys may be considered as ideal field laboratories for the interdisciplinary teaching of Environmental Sciences to undergraduate students in a Laurea degree, since different typologies of sampling sites (rivers, lakes, glaciers) may be found within walking distance, and students are encouraged to develop cooperative learning activities. Scientific data have been collected by 1st year students at the University of Insubria in Como during a teaching program in Ventina Valley and Caronno Valley near Sondrio (Italy). Analytical and geochemical results will be presented and discussed on the basis of organic deposition and water-rock interactions.

Annali di Chimica, 2004

Computerized analytical instruments of late 70's and 80's are facing rapid technological ... more Computerized analytical instruments of late 70's and 80's are facing rapid technological obsolescence, although they are often retaining good analytical performances. Responsibility is to be attributed to the fast advance in computer technology, which is leaving little or no back‐compatibility with old standards and data formats. Rejuvenation may be reached by simple hardware and software modifications, to allow data exchange with modern PC's and LIMS. Two typical case histories for spectrometric instrumentation of late 70's are then presented and discussed in a general fashion.

Talanta, 2008

Poor recoveries are obtained if the BCR three-step sequential extraction is applied to 100 mg spe... more Poor recoveries are obtained if the BCR three-step sequential extraction is applied to 100 mg specimens rather than to 1 g. It is observed that analytes are lost during each phase separation which is carried out via centrifugation and can be hardly quantitatively performed on 100 mg sediment specimens. An alternative procedure, which is carried out on a single empty SPE column and involves separation by filtration, is developed to solve this problem. The proposed method is validated on 100 mg samples of certified sediment (BCR-701), but could be potentially used for even lower sediment specimens. Problems related to pH stability during step 2 and its influence on recoveries is also reported.

Fresenius' Journal of Analytical Chemistry, 2001

92 (2002), 485-489 P4 A new microwave-assisted approach to the chemical analysis of mortars, L.

Annali di Chimica, 2006

A chemometric approach based on Principal Component Analysis (PCA) has been proposed, in order to... more A chemometric approach based on Principal Component Analysis (PCA) has been proposed, in order to study chemical features (major and minor ions, total alkalinity, dissolved silica) of surface and deep waters of Lake Como (Northern Italy). The method allowed us to investigate the correlations between the analyzed ions in an easy‐to‐see way, using bi‐dimensional graphs. In wintertime, the ionic composition of Lake Como waters seems to be mainly related to the geological composition of the lake basin, with a crystalline bedrock on the northern side and a sedimentary cover in the southern part. The presence of contaminants such as bromide and nitrite in water columns is also evidenced and discussed.