Deep extraction of chromium ions from sewage when using iron chips and absorbent carbon at tractor and agricultural mechanical engineering enterprises

In the study the results of researches of extrac-tion process of chromium ions from sewage formed at the enterprises of tractor and agricultural me-chanical engineering incorporating galvanic shops when using Fe-chips and absorbent carbon are presented. The research objective was receiving mathematical model of process of filtration cleaning and studying the possibility of application of sorp-tion for tertiary treatment on absorbent carbon. The concentration of chromium ions was calculated on nuclear and absorbing spectrometer of the 3300th production of Perkin-Elmer firm ardent atomizer. The analysis of chemical composition of the deposit was studied by a thermogravimetric method on the NETZSCHSTA 449F1 device. Technological pro-cess of extraction of chromium ions by means of planning the experiment on the Box-Hunter method was studied. For increasing the efficiency of pro-cess of extraction of chromium ions from sewage the possibility of using absorbent carbon received from brown coal of birch section KATEK was stud-ied. Its chemical composition and sorption capacity were defined. The data on studying properties and structure formed in the course of extraction for the development of technology of utilization, by means of thermogravimetric and X-ray phase analyses were obtained. The results of researches when planning the experiment on the method of Box-Hunter allowed determining the optimum modes by the size of pH and filtration speed. When studying the process of deep extraction of chromium ions of drains with use of absorbent carbon it was estab-lished that the sorption capacity of coal depended on initial concentration of ions of chrome and frac-tional composition of coal. The properties and the structure of the deposit were studied by a thermo-gravimetric method on the NETZSCHSTA 449F1 device in the mode DSK-TG, in the atmosphere of AZ, in the range of 30/20.0 (To / min)/1000 X-ray phase method.