INDAGINI SPETTROSCOPICHE SU PRODOTTI LATTIERO-CASEARI: UN APPROCCIO CHEMIOMETRICO ALLA TRACCIABILITÀ

Evaluation of the surface affinity of water in three biochars using fast field cycling NMR relaxometry

Many soil functions depend on the interaction of water with soil. The affinity of water for soils can be altered by applying soil amendments like stone meal, manure, or biochar (a carbonaceous material obtained by pyrolysis of biomasses). In fact, the addition of hydrophobic biochar to soil may increase soil repellency, reduce water-adsorbing capacity, inhibit microbial activity, alter soil filter, buffer, storage, and transformation functions. For this reason, it is of paramount importance to monitor water affinity for biochar surface (also referred to as 'wettability') in order to better address its applications in soil systems. In this study, we propose the use of fast field cycling NMR …

INDAGINI DI RILASSOMETRIA FFC-NMR APPLICATI ALLO STUDIO DELLE PROPRIETÀ DI NANOSPUGNE

Frammenti di Chimica

"FRAMMENTI DI CHIMICA. Come smascherare falsi miti e leggende" nasce, come afferma l'autore stesso, "dal desiderio di condividere la mia passione per la scienza e soprattutto dalla voglia di far capire che quanto si legge in rete deve essere sempre giudicato criticamente. In altre parole, bisogna sempre diffidare dei santoni che dicono di se stessi di essere novelli Giordano Bruno o redivivi Galileo Galilei perché le loro idee scientifiche (in realtà pseudo-scientifiche) sono osteggiate dai guru della “scienza ufficiale”. Non esiste alcuna “scienza ufficiale”. Come avrò modo di dimostrare, esiste un solo tipo di scienza ed è quella che segue delle regole ben precise – ovvero le regole del m…

Improvement of physical, chemical and biochemical proprieties of a salt affected Alfisol by addition of biochar and gypsum

Salinization is one of the major environmental problems threatening agricultural productivity. Soil salinization is defined as an excessive accumulation of salts within the soil profile. It negatively affects soil physical and chemical properties, as well as the biochemical ones. Reclamation of salt affected soils requires removal of soluble salts and Na+ from the soil exchange sites. Subsequently, salts are leached out the root zone by irrigation water when available. Gypsum (CaSO4·2H2O) is the most commonly used chemical amendment for reclamation of salt affected soils since it provides Ca2+ that replaces Na+ on the exchange sites and improves soil structure. Also organic amendments have …