activated carbon

The research determines the efficiency of the use of activated carbon in the process of water purification from heavy-metal ions for technological purposes in the food industry. Comparative studies of the use of sorbents of various types of activated carbon have been carried out. The study determines the factors that influence the efficiency of drinking water purification from heavy metal ions through activated carbon. It also proves the highest efficiency of oxidized form of activated carbon

The formation and properties of sugar beet pulp have been analysed in the article. It has been proposed to use it as raw material to produce activated carbon. A better hydrophilicity of the obtained carbon in comparison with the samples of industrial production has been shown. Structural features and a porous structure of carbon made of sugar beet pulp have been analysed by X-ray diffraction and small angle scattering methods. It has been found that pores with average radii of inertia of 3.5 nm make the main contribution to the pore structure.

The present article substantiates the theoretical bases lactic acid adsorption on mineral and carbon adsorbents. Monitoring of wastewater contaminated with wastes of dairy plants, estimation of quantities, peculiarities of wastes localization and estimation of toxicological impacts on the environment was carried out. The existing theoretical apparatus for adsorption processes description was analyzed. Adsorption process mechanism and methods for identification of experimental data in theoretical models was developed.

In this work activated carbon (AC) was used for the removal of cephalexin (CFX) from aqueous solution in a fixed-bed column. The breakthrough curves of the adsorption process of CFX on the walnut shell AC at different mass of the adsorbent, flow rate and initial CFX concentration were determined.

Adsorption of aromatic and heterocyclic compounds from aqueous solutions on Mn(III), Pb(IV), V(V) oxides and activated carbon under static conditions has been studied. The energies of occupied and unoccupied orbitals have been used as correlation parameters between the electronic and adsorptive properties of organic molecules. Frontier-controlled adsorptive mechanism is postulated for interpretation of the observed correlations for the specific adsorption of organic compounds on low-bandgap adsorbents.

Nanocomposites “activated carbon–zirconium(IV) oxide” were synthesized by homogeneous precipitation. The obtained samples were characterized by X-ray analysis and electron microscopy. The chemical composition of the nanocomposites was determined by the thermal analysis. Sorption properties were determined. The degree of phosphate ions removal was almost 97 %.

The activated carbon prepared from the bark of Ocimum Tenuiflorum reduces the amount of dissolved oxygen (DO) present in distilled water, which in turn reduces the rate of corrosion. The effects of DO, temperature and pH on the rate of mild steel corrosion were discussed. The inhibition efficiency of corrosion on mild steel was estimated by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The inhibition efficiency increases with increase in temperature, pH and the mass of activated carbon.

Activated carbon from Cocos nucifera leaves agrowaste was derived. The effect of impregnation ratio was studied by chemical activation method using phosphoric acid as an activating agent. Activated carbon was produced at the activation temperature of 673 K by slow pyrolysis. Nitrogen adsorption isotherms study was performed. Effect of impregnation ratio on the yield, methylene blue number, iodine number, and acid adsorption was studied. The FT-IR spectra show the presence of activated carbon. The TGA investigation reveals that activated carbon is thermally stable at 723 K.