In Morocco, countries with semi-arid climate, the increasing needs in water for the irrigation, the production of the electricity and the drinkable water supply, required the construction of a large number of dams. This infrastructure has to allow him to earn a living and to proceed to a better management of its resources in superficial waters
The dam BAB LOUTA is situated on the oued BOUSBAÂ (upstream to oued BOUHLOU), near the douar BAB LOUTA of capacity of 35500 million of m3. It has for main function the supply, of the city of Taza, in drinking water. The putting in water of the damis made at the beginning of year 2000. He has to meet the needs for the city. The latter, is situated in approximately 40 km as the crow flies in the southwest of the city of TAZA and 10 km of TAHLA.
This study concerned the physico-chemical quality of waters of the dam and its tributaries. To realize our work, we made, a monthly follow-up, spread out from January, 2016 till December, 2016. Analyses concerned 10 physico-chemical parameters, and 3 bacteriologicals parameters.
In most developing countries, the tanneries discharge their waste into the sewer systems, which in turn poured into the waters of continental surface, or used for irrigation of the land.
The high concentrations of chromium and hydrogen sulphide present in residual waters of the tanneries have a bearing on the quality of the water and may give him unpleasant tastes and odors.
The suspended solids such as lime, hairs, the pieces of fat and flesh, etc., disturb surface water and settle to the bottom, which harmfully affect fish.
In our study, we used an original method of electrochemical treatment of tannery effluents in order to quantitatively oxidize the trivalent chromium to hexavalent chromium and simultaneously destroy oxidizable organic compounds.
After the electrochemical treatment is complete. The hexavalent chromium is recovered by selective extraction and the organic phase obtained brought into contact with formic acid to reduce the hexavalent chromium to trivalent chromium.
The solution obtained can be used as such in chromium plating bath or converted to trivalent chromium derivatives used in the tanning industry.
The purpose of this study is the electrochemical treatment of a solution of textile colouring agent to know the methylene blue. The studied solution of methylene blue was prepared for the laboratory in a concentration of 0,5 g/L, from the colouring agent powder and not cleansed methylene blue. The prepared solution is neutral, (pH = 7,2); his conductivity of the order of 3,23 mS/cm while the turbidity is of the order of 91,8 NTU. The absorbance measured in a length of wave maximal 660 nm and of the order of 1,856.
In the first part we made a treatment(processing) of the colouring agent by electrochemical way in a reactor of capacity 5 liters, in an intensity of 5 In and a tension of 15 V, for the temperature of 30
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