Influence Of Copper And Zinc On The Power Furring Of Encrusting Water

AbstractIn calcareous soils, the underground water of Hamma carry significant concentrations of calcium hydrogencarbonate. For a content of 59 ¡ F waters were very hard and out have to be in a treated softening way or decarbonation before the use, because lead to phenomenes of scaling. The precipitation of an insulating layer of calcium carbonate on the walls of the water distribution have serious consequences technique and economic. In this work we studied the effect of copper and zinc on the precipitation of calcium carbonate by using the test of rapid controlled precipitation (RCP) and scaling tests on polyethylene. The test of rapid precipitation controlled in the presence of metal cations (Cu, Zn) at low concentrations (0.5mg/L of Cu2+, 0.15mg/L of Zn2+), retarted the precipitation of calcium carbonate.The test of scaling on polyethylene in the presence of Cu and Zn reached an efficiency of 100%. This reflects the pronounced inhibitory effect of these ions

Partial elimination of the water hardness by using (lime, soda and sodium carbonate): Representation of calcocarbonic balance curves

The distribution of groundwater for their use in the field domesticates or industrial often poses technical problems of corrosion or incrustation of the installations. To treat this water amounts studying the chemical composition and balances calcocarbonic of water.These balances result from the presence of ions coming from solubilization from the rocks by natural water such as (CO2−2, HCO−3, Cl−, SO2−4, Na+, K+, Mg2+, Ca2+). Accordingly we have to treat a very hard water of Hamma which is intended for the supply of the town of Contantine of drinking water and having a hardness of 60 french degrees by the use of a chemical process in the presence of lime, soda, sodium carbonate and to plot the corresponding calcocarbonic curves of balance. The results revealed that 0.16 g.L−1 of lime or 0.04 g.L−1 of soda made it possible to bring the water of Hamma close to the equilibrium calcocarbonic curve. Moreover, the use of 0.08 g.L−1 of sodium carbonate gives the best treatment