Kamila Kydralieva

Nanoparticles of Magnetite in Polymer Matrices: Synthesis and Properties

This review covers publications on magnetite nanoparticles in polymer matrix, especially in humic acids, which are very interesting, widespread natural polymers. Of special attention was the influence of synthetic conditions on the structure and physicochemical properties of magnetic nanomaterials as well as their potential in environmental applications as sorbents. Nanoparticles of Fe3O4 in polymer matrix as promising materials for environmental applications have been in the focus of a great number of studies due to their properties. The modification of magnetic nanoparticles by humic acids leads to increase the sorption properties of such composites and stabilization of magnetite nanoparticles, inhibiting their agglomeration. Thus, humic acids on the one hand, can be used as effective stabilizers for magnetoactive nanoparticles, and on the other hand, keep their protective properties towards ecotoxicants.

Preparation and Reactivity of Metal-Containing Monomers. 78. Scandium-Containing Monomers And Polymers: Synthesis, Structure and Properties

The Sc(III)-containing monomers and their (co)polymers has been first prepared and characterized. The composition and structure of the synthesized metal-containing monomers and (co)polymers examined by elemental analysis, IR and 13C-NMR spectroscopy. The thermal behavior of Sc(III)—containing monomers and (co)polymers was explored by DSC, DTA, TGA and mass spectrometry. It is shown that the obtained crosslinked copolymers exhibit a high thermal stability, have a porous structure with a developed system of micro- and mesopores, which may be of interest for their template-based customized sorbents for concentration and extraction of scandium.

Engineered Nanomaterials’ Effects on Soil Properties: Problems and Advances in Investigation

In this work, the sources of entry and migration pathways of engineered nanomaterials (NMs) in soil were described. NMs effect on soil ecotoxicity and some physical and chemical characteristics were studied in laboratory experiments. The influence of carbon- and metal-containing NMs with different sizes of nanoparticles (NPs) on living organisms in bioassay tests was analyzed. In standard biotests, organisms from different trophic levels were used. It was shown that the organic matter (humic substances) highly modified the toxic effects of NMs in soils, in particular, nanomagnetite. We suppose that these effects appear not only due to various specific surfaces of the nanoparticles used but also due to change of rheological characteristics of soil particles caused by interaction between soil particles and engineered nanoparticles in the presence of humate.