• AWWA ACE54325
Provide PDF Format

Learn More

AWWA ACE54325

  • Formation of Al-Mg Containing Solids in Water Treatment: Implications for Control of Effluent Al and Removal of Contaminants
  • Conference Proceeding by American Water Works Association, 06/01/2001
  • Publisher: AWWA

$12.00$24.00


Control of aluminum (Al) solubility in water by solids other than Al(OH)3 was explicitly tested at pHs below 6.0 and above 8.5. At lower pHs the presence of sulfate promoted formation of lower Ksp Al(OH)3 solid phases at pH 4.7-5.6; however, the presence of sulfate, silica or potassium did not cause formation of different solid phases. At higher pHs, aluminum andmagnesium were discovered to form a discrete solid phase in the pH range of 9.0-10.5 with the approximate formula Al2Mg(OH)7. When silica was also present in these systems, a different solid formed with the approximate formula Al2MgSiO2(OH)7, which gradually transformed into still another solid phase of approximate formula Al(SiO2)2(OH)3. Formation of these solids has direct implications for enhanced softening by dosing of alum coagulants and in control ofeffluent aluminum residuals. Includes 13 references, tables, figures.

Related Products

AWWA JAW69830

AWWA JAW69830

Journal AWWA - Preventing Two Types of Well Clogging..

$15.00 $30.00

AWWA JAW65355

AWWA JAW65355

Journal AWWA - Using Customer Feedback for Improved Water Quality and Infrastructure Monitoring..

$15.00 $30.00

AWWA C655-09

AWWA C655-09

Field Dechlorination..

$36.00 $71.00

AWWA B406-97

AWWA B406-97

Ferric Sulfate..

$21.00 $42.00