Description: Das Projekt "Investigations of biosorption in spent mushroom compost (SMC)" wird/wurde ausgeführt durch: Universität Halle-Wittenberg, Institut für Physik.Recently, interest has focused on green technology, which encompasses development of biodegradable and sustainable materials for removal of heavy metals from industrial wastewater. Previous studies were based on materials available in respective countries which showed that waste from industry and agriculture has a high potential to be used as biosorbents. Most research on biosorption is based on fungal biomass or sawdust biomass. To date, there is lack of information on the biosorption mechanisms of Pleurotus ostreatus spent mushroom farming waste in removing heavy metals from aqueous solution in the literature. Biosorption generally hinges on physiochemical interaction between the function groups and metal ions. Metal ions uptake by biosorption is complex and may involve the contribution of diffusion, adsorption, ion-exchange, complexation, or micro-precipitation mechanisms, depending on the specific substrate. Studies have shown that sawdust and mycelia of fungus can be used as a low-cost biosorbent of heavy metals, largely due to its lignocellulosic composition. The biosorption of heavy metals might be attributed to hydroxyl, carboxylic, amino and phenolic groups present in their polysaccharide of cellulose, pectin, hemicellulose, proteins and chitin which acts as active binding sites for various metallic and organic pollutants. There are several techniques to study characterization of biomaterial, generally these include FT-IR, SEM/EDX, XRD, XPS and liquid NMR. The limitation of liquid NMR is due to low solubility of lignocellulosic materials in organic solvents and aqueous solutions. Solid state 13C NMR is able to overcome this problem of solubility and reduces the structural uncertainties associated with the dissolution process. This has been extensively employed to study complex and solid or poorly soluble biomaterial such as fiber, algae, native potato starch, amylopectin, amylase, sprune sapwood, brown rot fungus, brown-rotted Scots pine and proteins. In general, the use of CPMAS solid state NMR can reveal the chemical composition, i.e. functional groups involved in the reaction. Nevertheless, solid-state 13C NMR spectra analysis is also very parameter-sensitive especially in the study of the heterogeneous biomaterial. Therefore, detailed elucidation of molecular dynamics often requires different dynamic experiments to be conducted to obtain the full extend of the mechanisms involved at the molecular structural level. This study will focus on the characterization of chemical composition of Pleurotus ostreatus mushroom farming waste by the CPMAS experiments. In addition, molecular dynamic characteristics of biosorbent from CP built-up analysis will be investigated in order to understand the biosorption mechanism. After biosorption, the metal can be recovered, and the material reused for biosorption or recycled, which can reduce the waste associated with mushroom farming and reduces the environmental impact.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Biobasierte Materialien ? Kompost ? Lignin ? Kartoffelstärke ? Substrat ? Organisches Lösungsmittel ? Abfallverwertung ? Adsorptionsmittel ? Zellulose ? Umweltauswirkung ? Schwermetall ? Abwasserreinigung ? Adsorption ? Chemische Zusammensetzung ? Fällungsreaktion ? Industrieabwasser ? Landwirtschaftlicher Abfall ? Spektralanalyse ? Metall ? Algen ? Biomassenutzung ? Abwasseruntersuchung ? Pflanzenzüchtung ? Reaktionsmechanismus ? Reinigungsleistung ? Organischer Schadstoff ? Standortwahl ? Studie ? Umwelttechnik ? Abfall ? Pilz ? Ionenaustausch ? Bioakkumulation ? Biomasse ? Landwirtschaft ? Chemische Reaktion ? Diffusion ? Beimischung ? Physikalischer Vorgang ? Schadstoffelimination ? mushroom compost ? Festkörper-NMR ?
Region: Sachsen-Anhalt
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2010-01-01 - 2010-12-31
Accessed 1 times.