The regulating of a structure and a pores volume of activated carbons by mechanical, chemical and thermal activations of agricultural wastes, such as apricot kernel shells were studied. The mechanical activation was provided in the grinding mill, in the aqueous medium. The chemical activation was implemented by treatment with sulfuric, hydrochloric, phosphoric acids at the concentrations of 5%-40% and by zinc chloride at the penetration coefficients of 0.1÷0.6. The thermal activation was effected in carbon dioxide atmosphere at the temperatures of 300÷100 о С. It was researched an influence of acid concentration, ZnCl 2 coefficient of impregnating, CO 2 temperature per volume of micro-, meso-and macropores. Activated carbons have arranged porous structures in the following line: processed by ZnCl 2 and CO 2 > processed by ZnCl 2 > processed by H 2 SO 4 > processed by H 3 PO 4 . For the samples are treated by ZnCl 2 and subsequent CO 2 , the activation optimal parameters are following: temperature of CO 2 =500 о С; the penetration coefficient = 0.4.
This work covers the mathematical modeling of ultrafiltration with immobile membranes for physiologically-active of methoxyanabasine C 11 H 16 N 2 O polymer solution. Methoxyanabasine is used as low toxic antineoplastic drug. On the basis of theoretical and experimental analysis of mass transfer and hydrodynamics, it is offered the mathematical model of permeability of membranes at an ultrafiltration of polymer solutions. Further the formulas for determination of factor of concentration polarization and ultrafiltration selectivity are calculated.
The paper describes the current state of dried fruits‘ production in the Republic of Kazakhstan, the value of dried fruits obtained from fruits of South Kazakhstan. The results of the analysis of promising technologies for dried fruits‘ production, in particular the line for fruits preparation for dried fruits‘ production, are presented, a description of the proposed equipment is presented: a washing bath for preliminary soaking and primary, easy washing.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.