Product Overview
Acid washed coal carbon water treatment GAC S is an acid-washed coal-based granular activated carbon designed for standard-duty ultra-pure water and food-grade water treatment. Manufactured from premium bituminous coal through carbonization, steam activation, and acid washing, it achieves a pH of 5–8 with iodine adsorption exceeding 900 mg/g and methylene blue above 150 mg/g.
Positioned as the standard acid-washed grade in our coal water treatment series, GAC S provides reliable organic removal and dechlorination for applications where premium SQ-grade capacity is not required. The acid-washed surface ensures minimal pH drift and reduced extractable content compared to standard non-washed coal carbons.
Key Application Areas
- Ultra-Pure Water Treatment — Polishes deionized water for electronics, laboratories, and power generation where moderate organic removal and pH stability are required.
- Beverage Processing Water — Treats ingredient water for breweries, bottling plants, and food manufacturing, supporting consistent product quality.
- Point-of-Entry (POE) Systems — Provides whole-building protection against chlorine and organics in residential and commercial water supplies with neutral pH effluent.
Specifications
| Technical Specifications | GAC 830S | GAC 1240S | Unit |
|---|---|---|---|
| Iodine Adsorption Value | >900 | >900 | mg/g |
| Moisture Content | <10 | <10 | % -wt |
| Methylene Blue Adsorption Value | >150 | >150 | mg/g |
| pH | 5-8 | 5-8 | - |
| Average Particle Size | 1.4-1.7 | 1.2-1.4 | mm |
| Crush Strength | >90 | >90 | % |
| Specific Surface Area | >900 | >900 | m²/g |
| Particle Size >8 Mesh (1.70 mm) | <10 | - | % -wt |
| Particle Size >12 Mesh (1.70 mm) | - | <5 | % -wt |
| Particle Size <30 Mesh (0.6 mm) | <5 | - | % -wt |
| Particle Size <40 Mesh (0.43 mm) | - | <5 | % -wt |
Available particle size
- 8×30 Mesh ( 0.6 ~ 2.36 mm)
- 12×40 Mesh ( 0.43 ~ 1.7 mm)
Packaging
- The 20kg / Package
- The 500 kg / Package
Key Advantages
- Cost-Effective Acid-Washed Performance: pH 5–8 and reduced ash deliver acid-washed benefits at a practical price point for standard ultra-pure and food-water systems.
- Proven Dechlorination Kinetics: Iodine >900 mg/g ensures rapid chlorine and chloramine reduction, protecting downstream RO membranes and ion exchange resins.
- Dual Mesh Options: GAC 830S (1.4–1.7 mm) suits high-flow POE; GAC 1240S (1.2–1.4 mm) provides enhanced contact for polishing applications.
- Stable Water Chemistry: Acid washing prevents the alkaline pH spikes common in standard coal carbons, reducing the need for downstream pH adjustment.
How GAC S Enables Acid Washed Coal Carbon Water Treatment
Standard coal-based activated carbons naturally exhibit alkaline pH due to residual ash minerals. In ultra-pure water systems, beverage processing, and POE applications where strict pH stability is required, this alkalinity may necessitate post-treatment pH adjustment to maintain process specifications and protect sensitive downstream equipment such as RO membranes and ion exchange resins.
GAC S solves this through controlled acid washing. The acid washed coal carbon water treatment protocol removes soluble ash and alkaline residues, achieving a stable pH of 5–8 without degrading the adsorption pore structure. When installed in ultra-pure water loops or POE systems, the neutral surface chemistry prevents pH excursions while the >900 mg/g iodine ensures rapid dechlorination and organic removal. The result is clean, stable water chemistry that reduces the need for downstream pH correction.
GAC S vs Standard GAC and Premium GAC SQ
Standard GAC provides >900 mg/g iodine for general drinking water treatment at the lowest cost but lacks pH control. GAC SQ offers higher iodine (>950 mg/g) and methylene blue (>160 mg/g) for enhanced performance in the most demanding ultra-pure and food-grade systems.
GAC S bridges this gap as the practical acid washed coal carbon water treatment choice. It delivers acid-washed benefits at a cost-effective price point for standard ultra-pure water, beverage processing, and POE systems where premium SQ-grade capacity is not required. The dual mesh options (GAC 830S and GAC 1240S) match different flow and contact requirements. Choose standard GAC for general duty where pH is not critical; select GAC SQ for maximum-capacity electronics-grade systems; choose GAC S for reliable acid washed coal carbon water treatment in standard sensitive applications.