Why It Matters
Industrial effluent carries dissolved heavy metals (Cu, Zn, Ni, Pb, Cr) that must be removed to discharge limits. Design raises pH with hydroxide alkalis to each metal's minimum-solubility point, precipitating insoluble metal hydroxides for clarification
Solution Approach
Industrial effluent carries dissolved heavy metals (Cu, Zn, Ni, Pb, Cr) that must be removed to discharge limits. Design raises pH with hydroxide alkalis to each metal's minimum-solubility point, precipitating insoluble metal hydroxides for clarification RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (4)
Calcium Hydroxide (Pickling Lime)
CAS 1305-62-0
Specialty Additives
pH Adjustment
Hydrated lime raises pH to the minimum-solubility window where dissolved metals drop out as M(OH)n; also adds Ca that aids floc density and sulfate removal
Melting Point: 580 °C (Decomposes) (Loses H2O) Boiling Point: Decomposes Density: 2.24 at 20 °C
Full Details
Calcium oxide (quicklime)
CAS 1305-78-8
Specialty Additives
pH Adjustment
1910 (CALCIUM OXIDE) · Class Quicklime slakes to Ca(OH)2 for the same hydroxide precipitation, a lower-cost high-alkalinity source for large flows
Melting Point: 2572 °C Boiling Point: 2850 °C at 760 mmHg Density: 3.3 at 20 °C
Full Details
Magnesium Hydroxide
CAS 1309-42-8
Specialty Additives
pH Adjustment
Self-buffering alkali (~pH 9) that precipitates metals while resisting overshoot, producing a denser, lower-volume sludge than caustic
Physical Description: White odorless solid; Colorless or white solid;… Appearance: White, hexagonal crystals Odor: Odorless
Full Details
Caustic Soda (Sodium Hydroxide) Beads
CAS 1310-73-2
Acids & Salts
Primary alkali for pH raise
1824 (SODIUM HYDROXIDE SOLUTION) · Class Sodium hydroxide gives precise, fast pH elevation to hit each metal's minimum-solubility pH where lime handling/sludge is undesirable
Melting Point: 318 °C Boiling Point: > 130 °C at 760 mmHg Density: 1.5 at 20 °C
Full Details