Two various kinds of olive mill solid residues (Crude and partly destoned) were used to investigate the adsorbing property of olive mill solid residues (OMSR) to heavy metals. 100 adult albino rats were classified into four groups. One group served as (–ve) control group (10 rats), received balanced ration and supplied tap water; in addition to three equal groups (each of 30 rats) received water polluted with1/100LD50 of either lead, cadmium or copper at concentration levels( 107.2 mg/L, 8.8mg/L or 58.4mg/L respectively). Each main group was divided into 3sub- groups, one (+ve) control and two experimental groups fed either 20 % crude olive mill or 20% partly destoned olive mill. Polluted water administration extended for 1 month, meanwhile feeding 20% crude or partly destoned (OMSR) continued for further 30 days after cessation of polluted water as a withdrawal period. Samples of serum, muscle, liver and kidney were collected at one month of the experiment and at the end of the withdrawal period after one month. Level of metals were determined by atomic absorption spectrophotometer. Results indicate that crude olive mill exhibit higher adsorption capacities to Pb, cd, and cu than partly destoned especially at withdrawal period. In conclusion, the main advantage of this process is the conversion of this waste product to a useful adsorbent material with low coast in minimizing the toxic hazard of environmental pollution with heavy metals.

Disinfection of cattle-breeding farms and their equipment is an action directed towards eradication of causative agents of infectious diseases in environment, towards the liquidation of the infection focal points as one of epizootic chains by means of application of various chemical substances. Study of the corrosive activity of developed in Belarus disinfectants and their comparison with the foreign analogues was realized. Cattle-breeding premises possess considerable metal consumption. Traditional disinfectants possess the expressed corrosive action and cause the substantial deterioration and damage of metal structures of premises. In recent years there were developed and recommended for application in veterinary science some new nontoxical, ecologically safe disinfectants, developed with the assistance of scientists of the S.N. Vyshelesskij Institute of Experimental Veterinary Medicine of Belarus, such as: Virkotsid (technical specifications BY 190245337.001-2007), Sandim-D (technical specifications BY 100917107.001-2007), combined disinfectant of surfaces, Valisan (technical specifications BY 101385752.001-2006), Belopag (technical specifications BY 100162869.059-2005), Belsteril (technical specifications BY 500027013.001-001-2003) and Vitmol (technical specifications BY 300047997.001-2003). Research results showed that the analysed disinfectants possessed less corrosive activity to metals in comparison with the foreign analogues (Glutex, Dezavid, Virkon C, etc.). The least severity of corrosion was stated in the disinfectants representing the compositions of the bactericide agents (Sandim-D, KDP, Belopag, Vitmol, Virkotsid, Valisan, etc)