Difference between polyaluminum ferric chloride and polyaluminum chloride
Release time: 2025-09-12
Polyaluminum ferric chloride (PAFC) and polyaluminum chloride (PAC) are two commonly used inorganic polymer coagulants, and their main differences are as follows:
1. Composition and appearance
- Polyaluminum chloride (PAC): The main component is aluminum salt, yellow, beige or white (food grade). White PAC is the highest purity and used for drinking water treatment.
- Aluminum ferric polychloride (PAFC): a compound of aluminum and iron salts, usually containing about 4% iron, and appearing as reddish brown or brown powder.
2. Scope of application
- PAC: can treat drinking water, industrial water and sewage; especially good at purifying river water, the effluent quality is soft, not easy to cause fabric hardening.
- PAFC: only used for industrial wastewater treatment (such as steel mills, paper mills, printing and dyeing wastewater, etc.), not suitable for drinking water; it has a significant effect on high turbidity and low temperature and low turbidity wastewater, and the flocculation sedimentation speed is fast.
3. Performance features
- PAC: strong turbidity and decoloration performance, wide range of applicable pH (6-9); low corrosion, but the effect may decrease in low temperature environment.
- PAFC: it has the adsorption and bridging ability of aluminum salt and the precipitation speed of iron salt, and the floc is dense; it has stronger low temperature adaptability and higher removal rate of heavy metals (such as Cr⁶⁺).
4. Raw materials and processes
- PAC: Aluminum hydroxide powder is used for drinking water grade, calcium aluminate powder can be used for industrial grade.
- PAFC: Using aluminum calcium powder and iron compound as raw materials, the production process introduced iron ion to enhance the coagulation effect.
5. Cost and purpose
- The price of PAC is higher, especially the high purity white PAC;
- PAFC has low cost and is suitable for large-scale industrial wastewater treatment.
Summary Suggestions:
- Select PAC: drinking water, low turbidity water source or softening water scenarios (e.g., textile wastewater);
- Choose PAFC: highly polluted industrial wastewater (such as heavy metal, high COD wastewater) or low temperature environment.
The specific dosage should be determined through small tests (generally PAC dosage 1-15g/ton of water, PAFC dosage 3-40g/ton of water). If it is necessary to combine and enhance the efficiency, PAC and polyacrylamide (PAM) can be used together.
Related Blog
Record of customers' visit Brazilian customers visit Aierfuke
2025-08-15 15:27
Reception of philippines clients
2025-04-11 15:00
Solution of floc texture frivolous in water treatment process
2024-05-16 00:00
Hotline:
Address：The west industrial cluster area of Jiaozuo City, Henan province, China
Email：aefk@aefkchem.com
Foreign Trade Manager ：+86-15803910375
Copyright© 2024 Henan Aierfuke Chemicals Co., Ltd www.300.cn SEO This website supports IPv6 Privacy Policy