Abstract
Alginite has been evaluated as an efficient pollution control material. In this paper, alginite from maar Pincina (SR) for removal of Cd 2+ ions from aqueous solution was studied. The potential sorbent was characterized by X-ray fluorescence analysis (RFA) analysis, Fourier transform infrared spectral analysis (FT-IR) and specific surface area (SSA) was also determined. The sorption process was optimized from the point of initial cadmium concentration effect and effect of pH value. The Freundlich and Langmuir models were used to interpret the sorption behavior of Cd 2+ ions, and the results showed that experimental data were well fitted by the Langmuir equation. Alginite maximal sorption capacity (Qmax) for Cd 2+ ions calculated from Langmuir isotherm was 34 mg/g. Sorption process was significantly affected by initial pH value in the range from 4.0-7.0. Alginite is a comparable sorbent with other materials for toxic metals removal. amendment of organic or inorganic materials to soil is considered as a way to improve physico-chemical properties of soil. However, metal forms begin mobile and thus available only in soil solution. Solubility of metal complexes in liquid phase and subsequently adsorption or redox processes has a crucial role in metal behavior in soil matrix. Removal of toxic metals from liquid phase using different biological materials, that have high sorption capacity and cheaper regeneration cost, can be compared to synthetic sorbents and ion-exchange resins. Kerogens are wide groups of natural raw materials that can be used as remediation tools (9). Alginite is a sedimentary laminated rock- an oil shale. Dark laminae are rich in amorphous matter and well preserved cells of green alga Botryococcus braunii (10). This kerogen material contains valuable concentrations of macro and micronutrients. Significant high specific surface area of alginates is important factor for their application in adsorption process. In the present work we investigate the sorption properties of alginite from the maar Pincina in Slovak Republic for cadmium as a model of toxic metal. The principal objective of the study was confirmation of alginite utilization for heavy metal removal and their stabilization in aqueous and soil solution, respectively.
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