Nikolai V. Chesnokov

Preparation of Carbamide Containing Biocomposite Fertilizer with the Increase Water Resistance Based on the Aspen Bark

The method of preparation of carbamide containing biocomposite fertilizer with the increase water resistance, including the impregnation of a support from aspen bark by urea water solution and the subsequent deposition of the urea nitrate, was proposed. The influence of conditions of a biocomposite fertilizer obtaining on its resistance to nitrogen leaching by water was studied. It was shown that the urea transformation to nitrate form on a support surface allow to decrease by approximately 2 times the nitrogen leaching from the biocomposite fertilizer.

Effect of the Porous Supports Properties on the Biocomposite Fertilizers Resistant to Leaching of Potassium and Phosphates

Properties of the biocomposite fertilizers obtained by impregnation of porous supports of a different nature by water solution of К2НРО4 were studied. The influence of the supports nature (activated charcoal BAU, pine bark and pine sawdust) and preparation conditions on fertilizers resistance to leaching by water was studied. It was shown, that biocomposite fertilizers with support from pine sawdust have the largest waterproof that provides their prolonged action.

Sorption of Oil Products by Carbon Sorbents from Siberian Larch Bark

The adsorption capacity for oil products of granulated sorbents prepared by preliminary carbo-nized larch bark activation with water steam in a fluidized bed was studied. The effect of temper-ature and time of carbonized bark activation on the oil sorption capacity of obtained sorbents was investigated. It has been shown that the increase the temperature of activation from 750 °C to 850 °C and the time of treatment from 30 minutes to 90 minutes leads to the increase of the oil static sorption capacity. The maximum oil capacity (6.8 g/g) was achieved for the sorbent with a grain size of 1-2 mm which was prepared by activation of carbonized bark at 850 °C during 30 minutes.

Features of Steam Activation in Fluidized Bed Reactor the Larch Bark and Solid Residues of Its from Extraction Processing

Some features of water-steam activation in fluidized bed reactor of larch bark and solid residues of bark extraction processing were studied. It was established that the reactivity of charcoal obtained from the extracted bark is significantly higher than the reactivity of charcoal obtained from raw bark and the duration of activation of charcoal from extracted bark is less by 3 times as compared to charcoal from original bark. It was shown that the yield of activated carbon and its sorption characteristics depend on the size of the fraction of the feedstock and they practically do not depend on the number of stages of extraction processing. All samples of activated carbon from larch bark have a high adsorption capacity on iodine (99 %) which is higher than that of the industrial active charcoal BAU.

Obtaining of Organomineral Fertilizers on the Basis of Wood Bark (Review)

Analytical review of the literature devoted to obtaining and to study of properties of organic and organomineral fertilizers based on a wood bark was performed. Biotechnological methods of wood bark processing under aerobic and anaerobic conditions were considered. Methods of obtaining of new fertilizers on the basis at birch bark – biocomposite organomineral fertilizers with the prolonged action were described. The promising directions were defined for advanced studies on the field of fertilizers obtaining from wood bark.