An assessment of resources and qualitative composition of raw materials of Slavnoye and Esmonovsky Mokh peat deposits, reserved by the state for bio-thermochemical processing, has been made. On the basis of a complex of studies of organo-mineral, group and botanical compositions, technological characteristics and peat reserves, the possible directions of the complex use of raw materials are substantiated. A nomenclature list of products recommended for production has been developed. Based on consideration of such indicators as science intensity and high added value, consumer demand and the quality of the raw materials available at the deposit, types of commercial products that can be obtained from the specified raw materials have been determined, its approximate volumes and volumes of received products, as well as approximate price indicators of these products. It is shown that the more preferable is to obtain different directions of sorbents use, then biohumate preparations for both studied deposits in relation to the fuel direction (peat briquettes, milled peat).
The study of properties and disclosure of formation mechanisms of supramolecular structures of metalhumic acid complexes (MHCs) are of importance for understanding the processes of structuring and diffusion of inorganic substances in natural media and for solving practical problems relevant to waste water purification from heavy metals.Previously [1][2][3][4], the conditions of MHC formation (with metal concentrations as high as 50 wt %) from solutions were determined. This is typical of ecologically significant metals such as copper, lead, chromium, and nickel, and enables us to consider the feasibility of using MHCs for concentration and subsequent regeneration of non-ferrous metals in the processes of waste water purification.The goal of this work is to investigate the peculiarities of the formation of supramolecular structures of copper-and lead-humic acid complexes from aqueous solutions.Humic acids (HAs) of low-moor sedge and highmoor cotton grass peats with the content of carboxyl groups of 2.5 and 3.2 mg-equiv/g, respectively, were used as the objects for the study. Metal-humic acid complexes were prepared from paramagnetic copper ions and nonparamagnetic lead ions with different sizes and properties. Preparations of HAs were obtained by solving the acids in alkaline solutions with pH 11-12. The complexes were prepared by adding calculated amounts of HAs to solutions of copper sulfate (lead(II) nitrate) up to the metal (Me) : HAs mass ratios listed in Tables 1 and 2, with HAs being taken as solutions of different concentrations. The resultant solutions were stirred; precipitates were separated by centrifugation and washed with water until a negative reaction for the precipitated ions. The concentrations of these ions in the initial and final solutions were measured with a Saturn-3P-1 atomic-absorption spectrometer; the amount of a sorbed metal was determined as the difference between aforementioned concentrations.The thus-obtained MHCs were investigated by IR and ESR spectroscopy. The ESR spectra were recorded with a modified RE-1301 spectrometer at room temperature in air. The spectra of studied samples were recorded simultaneously with the spectrum of a reference Mg sample containing microquantities of Mn 2+ and Cr 3+ that allowed to increase the accuracy of measuring parameters of ESR spectra and to control the microwave power supply of the resonator [5]. The reference sample was developed at the Institute of the Problems of Employment of Natural Resources and Ecology, National Academy of Sciences of Belarus. The measurement accuracy for g factor was ± 0.0002; width ∆ H and intensity of ESR signals were measured with an accuracy within 10 and 20%, respectively. In order to enhance the information content, the ESR spectra of organic paramagnetic centers (PMC) were recorded at low and high levels of microwave power (0.1 and 50 mW, respectively) [1]. The IR spectra were recorded with an UR-20 instrument according to a standard procedure with KBr [6].It was assumed [1,7] that the mechanism of MHC formation...
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