Provide PDF Format
AWWA ACE63124
- Enhanced Silicon and Boron Removal during Precipitative Softening
- Conference Proceeding by American Water Works Association, 06/01/2006
- Publisher: AWWA
$12.00$24.00
This slide presentation outlines a study on enchanced silicon and boron removal during precipitative softening. Information on silicon and boron is outlined and includes: Silicon - clogging of distribution system piping, reverse osmosis (RO) membranes;Boron - toxicity to plants at fairly low levels(~ 0.3-1 mg/L forinitial symptoms), possible human health concerns;Lifetime Health Advisory of 0.6 mg/L issued in 1992; and, WHO 0.5 mg/L; EU 1.0 mg/L. Topics outlined include: results from recent U.S. survey; Ames, Iowa WTP schematic; Ames data; current understanding of Si and Bremoval during softening; "In situ" ppt of Mg for Si and B removal; mineral stability diagram; X-ray difraction; known and unknown parameters; equations; model results; Boron jar test data; and, Freundlich Isotherm fit. Conclusions indicated:silicon removal during softening via am-Mg<sub>2</sub>SiO<sub>4</sub>;enhanced boron removal via sorption to am-Mg<sub>2M</sub>SiO<sub>4</sub>; and,boron removal estimated by Freundlich isotherm. Includes figures.
Related Products
AWWA ACE94040
A Statistical Approach to Determine Ground Water Sources Under the Direct Influence of Surface Wate..
$12.00 $24.00
AWWA WQTC58978
Occurrence of Sulfonamide Antibiotics in Drinking Water Sources and Their Transformation in Chlorine..
$12.00 $24.00
