Description
In this study, the dissolution rates of pure plattnerite (ß-PbO<sub>2</sub>) were investigatedas a function of pH, dissolved inorganic carbon (DIC), orthophosphate, and the presenceof chloramines. A continuous stirred tank reactor (CSTR) loaded with 1 g/L ofplattnerite was used to measure the lead dissolution rates. The lead concentration and pHof the effluent were monitored continuously and reached steady-state values within oneday. The dissolution rates were on the order of 10<sup>-10</sup> mol/m<sup>2</sup>-min. At all pH valuesstudied (7.5, 8.5, and 10), the dissolution rate increased with increasing DIC, probablydue to the formation of soluble Pb-carbonate complexes. The fastest dissolution rateswere observed at the lowest pH of 7.5. The initial PbO<sub>2</sub> solid and possible transformationproducts were characterized by X-ray diffraction. Includes 16 references, figures.
Product Details
- Edition:
- Vol. – No.
- Published:
- 11/01/2009
- Number of Pages:
- 9
- File Size:
- 1 file , 890 KB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
