Scale green inhibitor

What is it about?

This paper focuses on the development of a new green inhibitor “aqueous extract of Paronychia argentea” for reducing calcium carbonate scale formation on metallic surfaces. The effects of temperature and biocides on the efficiency of the inhibitor were investigated. Their antiscaling properties have been evaluated by the chronoamperometry method and the calcareous layers were characterized by scanning electron microscopy observations. A complete scaling inhibition was obtained with a concentration of 70 ppm of green inhibitor for calcocarbonically pure water at 20 1C and 45 1C. However, its efficiency was decreased at 60 1C. Different commercially available biocides named B310, 320, B330 and B340 were also tested. The biocide B340 was the only found not compatible with green inhibitor.

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Why is it important?

The obtained data take in the evidence that P. argentea aqueous extract was succesfully tested for preventing scale deposition on copper. A concentration level of 70 ppm was found as an optimal concentration in calcocarbonically pure water at 20 1C and 45 1C but its efficiency was decreased at 60 1C. The extract can be used as a good antiscalant. The action mode of PA aqueous extract and the temperature on scale inhibition are under process for a better understanding of the mechanism. Different biocides B310, B320, and B330 were found compatible with PA aqueous extract except for dibromonitrilopropionamide-2-butoxyethanol (B340) where interaction with the inhibitor is probably involved.