| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4435437 | Water Resources and Industry | 2015 | 6 Pages |
•The inhibition of the scale by a commercial antiscalant in MED has been studied commercial anti-scalant.•The influence of concentration factors and dose have been investigated.•Significant amounts of scale deposited from the seawater containing high concentrations of calcium ions.•Percentage inhibition decreases with increasing the temperature and increases with increasing the dose.•The percentage inhibition was almost 100% for the carbonate scale.
In this work, the inhibitory effect of a commercial anti-scalant (Veolia Hydrex® 9209) on the calcium minerals of carbonate, sulfate and hydrocalumite (Ca/Al) clay deposition from seawater has been investigated. Different concentration factors and anti-scalant doses were studied by analyzing the water hardness and turbidity. The inhibitory effect of the investigated anti-scalant was efficient even at lower concentrations. The percentage inhibition decreases with increasing the temperature and increases with increasing the dose/amount of the anti-scalant. The carbonate scale inhibition was >99% and 98–99% at 50 and 70 °C, respectively. The percentage inhibition of sulfate from hemihydrate was ranged from 80% to 87% for 2 and 8 ppm anti-scalant at 50 °C. The inhibition of Ca/Al hydrocalumite deposition increases from 70% to 90% upon increasing the dose from 3 to 5 ppm, respectively. A recommended useful dose of antiscalant for seawater is 5 ppm.
