Study of Green Nanoparticles and Biocomplexes Based on Exopolysaccharide by Modern Fourier Transform Spectroscopy By Goran S. Nikolić, Milorad D. Cakić, Slobodan Glišić, Dragan J.
Cvetković, Žarko J. Mitić and Dragana Z. Marković
The intention of this chapter is to contribute in clarification of nanoparticle synthesis and biocomplexes based on exopolysaccharide, green synthetic method development, their physico‐chemical characterization by modern spectroscopy, as well as testing of their antimicrobial activity. Silver nanoparticles of polysaccharide type have scientific interest, but practical importance too, because of their application in pharmaceutical and cosmetic product development due to proven antimicrobial and antioxidant activities. On the other hand, the biocomplexes based on exopolysaccharides are important in treatment of biometal deficiency in human and veterinary medicine, as well as in metal ion transporting in organism. Despite a number of studies of this kind of complexes, the investigations of effect of their structure to pharmaco‐biological activity are still interesting. It is important that question of interaction between reducing and stabilizing agents with metal ions is still opened. In this respect, the presented chapter offers further progress in the examination of silver nanoparticles and cobalt biocomplex synthesis with dextran oligosaccharides and its derivatives (such as dextran sulfate and carboxymethyl dextran). The complex structure, spectroscopic characterization, and the spectra‐structure correlation have been analyzed by different Fourier transform infrared (FTIR) spectroscopic techniques combined with energy‐dispersive X‐ray (EDX), X‐ray diffraction (XRD), scanning electron microscopy (SEM), and surface plasmon resonance UV‐Vis methods.
Part of the book: Fourier Transforms
Bottle Gourd (Lagenaria vulgaris) Shell as a Natural, Biodegradable, Highly Available, Cheap, Agricultural by-Product, Miscellaneous Biomass, Ion Exchanger, Biosorbent and Fertilizer By Goran Nikolić, Dragana Marković Nikolić, Aleksandar Bojić, Danijela Bojić, Ljubiša Nikolić, Ljiljana Stanojević, Miloš Durmišević, Nataša Simonović and Miloš Kostić
The increased interest in natural, renewable, biodegradable, easily available, low-cost materials makes agricultural residues, such as lignocellulosic biomass, attractive raw materials for the preparation of effective biosorbents for various pollutants (metal ions, anions, dyes, pharmaceutical degradation products, metabolites, organic macromolecules) for the wastewater treatment. Various covalent and non-covalent modification approaches significantly improve the sorption properties of these lignocellulosic functional particles, even improving their dispersion in hydrophobic polymer matrices, associative properties in water, rheological properties, surface-active properties, which can control the sorption of various ionic pollutants both in batch and in flow mode. Advantages over commercial sorbents (techno-economic aspect, no secondary pollution, usability as fertilizers), easy separation from the sorption medium, microstructural properties (strength, porosity, interactivity, stability), as a promising and sustainable biosorbent highlight the environmentally friendly bottle gourd shell. On the example of this biosorbent, the conventional approach to the pollutant sorption process (comparative kinetic, thermodynamic and equilibrium tests) was improved, as well as its shortcomings in predicting optimal process parameters. To fill the gaps of the already unnecessary numerous experiments, a design study involving OVAT experimental approaches integrated with DoE methodology was conducted. This integrated experimental design was implemented in the optimization of the pollutant sorption process.
Part of the book: Sorption - New Perspectives and Applications [Working title]
