Water treatment involves various chemicals to purify and disinfect water for industrial, municipal, and domestic use. Here are the main categories of chemical products used in water treatment:
1. Coagulants and Flocculants
Used to remove suspended solids by clumping particles together.
Coagulants:
Aluminum sulfate (Alum)
Ferric chloride (FeCl₃)
Ferrous sulfate (FeSO₄)
Polyaluminum chloride (PAC)
Flocculants:
Polyacrylamide (PAM) – anionic, cationic, or non-ionic
Chitosan (natural polymer)
2. Disinfectants and Biocides
Kill bacteria, viruses, and other pathogens.
Chlorine-based:
Chlorine gas (Cl₂)
Sodium hypochlorite (NaOCl) – Bleach
Calcium hypochlorite (Ca(OCl)₂)
Non-Chlorine Disinfectants:
Ozone (O₃)
Hydrogen peroxide (H₂O₂)
Chlorine dioxide (ClO₂)
UV light (physical disinfection, but often combined with chemical treatments)
3. pH Adjusters (Alkalinity & Acidity Control)
Used to balance water pH for optimal treatment.
Acidic Agents (lower pH):
Sulfuric acid (H₂SO₄)
Hydrochloric acid (HCl)
Alkaline Agents (raise pH):
Sodium hydroxide (NaOH) – Caustic soda
Lime (Calcium hydroxide, Ca(OH)₂)
Soda ash (Sodium carbonate, Na₂CO₃)
4. Scale and Corrosion Inhibitors
Prevent pipe scaling and metal corrosion.
Phosphates:
Sodium hexametaphosphate (SHMP)
Phosphonic acids (HEDP, ATMP)
Silicate-based inhibitors
Polyacrylates & other polymers
5. Antifoaming Agents
Prevent foam formation in industrial processes.
Silicone-based defoamers
Polyglycol-based antifoams
6. Heavy Metal Removal Agents
Used to precipitate toxic metals like lead, arsenic, and mercury.
Chelating agents (EDTA, DTPA)
Precipitants:
Sodium sulfide (Na₂S)
Ferric chloride (for arsenic removal)
7. Ion Exchange Resins
Used in water softening and demineralization.
Cation exchange resins (remove Ca²⁺, Mg²⁺)
Anion exchange resins (remove nitrates, sulfates)
8. Activated Carbon
Removes organic contaminants, chlorine, and odors.
9. Specialty Chemicals
Algaecides (e.g., Copper sulfate) – Kill algae in reservoirs
Redox agents (e.g., Sodium bisulfite – removes excess chlorine)
Applications:
Drinking Water Treatment (coagulation, disinfection)
Wastewater Treatment (sludge dewatering, heavy metal removal)
Boiler & Cooling Water Treatment (scale/corrosion control)
Swimming Pool Treatment (chlorination, pH balancing)
Our company provides most water treatment chemical products, targeting different industry customer groups and water treatment requirements. If you want to know more about water treatment products, please feel free to contact WhatsApp or WeChat: +86 18925133744