Product Overview
Acid washed high iodine carbon GAC-P S is the acid-washed variant of our high-iodine coal-based granular carbon, engineered for applications where pH stability and low extractable content are essential. Manufactured from premium bituminous coal through carbonization, steam activation, and extended acid washing, it achieves a pH of 5–8 while maintaining an iodine adsorption value exceeding 950 mg/g and methylene blue above 160 mg/g.
This granular carbon serves ultra-pure water, beverage processing, and point-of-entry systems where the alkaline pH of standard coal carbons would require downstream correction. The acid-washing protocol removes soluble ash and minerals, reducing conductivity spikes and protecting sensitive equipment.
Key Application Areas
- Ultra-Pure Water Polishing — Treats deionized water in electronics and power generation where neutral pH and low leachable content prevent process contamination.
- Beverage & Brewery Water — Purifies ingredient water for beer, soft drinks, and bottled water, maintaining stable water chemistry that supports consistent product taste and clarity.
- Point-of-Entry (POE) Drinking Water — Installed at building entry to remove chlorine and organics while delivering pH-neutral effluent that protects residential plumbing and appliances.
Specifications
| Technical Specifications | GAC-P 830S | GAC-P 1240S | Unit |
|---|---|---|---|
| Iodine Adsorption Value | >950 | >950 | mg/g |
| Moisture Content | <10 | <10 | % -wt |
| Methylene Blue Adsorption Value | >160 | >160 | 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
- Acid-Washed pH Neutrality: pH 5–8 eliminates alkaline drift common in standard coal carbons, reducing the need for post-treatment pH adjustment in sensitive systems.
- Dual Performance Indicators: Iodine >950 mg/g ensures rapid small-molecule adsorption; methylene blue >160 mg/g confirms capacity for larger organics and color precursors.
- Low Extractable Content: Acid washing reduces soluble ash and metal ions, minimizing downstream contamination risks in ultra-pure and food-grade loops.
- Dual Mesh Flexibility: 830S (1.4–1.7 mm) optimizes high-flow POE systems; 1240S (1.2–1.4 mm) enhances contact efficiency for ultra-pure water polishing.
How GAC-P S Enables Acid Washed High Iodine Carbon Treatment
Standard high-iodine coal carbons deliver excellent adsorption capacity but retain natural alkaline ash residues. In ultra-pure water loops, electroplating baths, and sensitive beverage systems, this alkalinity can cause pH drift, conductivity spikes, and mineral leaching that compromise process stability and product quality.
GAC-P S solves this through extended acid washing. The acid washed high iodine carbon protocol removes soluble ash and metal ions while preserving the micropore structure responsible for rapid dechlorination and organic adsorption. The result is pH 5–8 effluent with minimal extractable content, protecting downstream RO membranes, ion exchange resins, and plated surfaces. Despite the washing process, the carbon maintains >950 mg/g iodine and >160 mg/g methylene blue, ensuring that acid-washed purity does not come at the cost of performance.
GAC-P S vs Standard GAC-P and GAC S
Standard GAC-P delivers >1000 mg/g iodine with standard pH for maximum capacity in high-duty water treatment. GAC S provides acid-washed benefits at a standard >900 mg/g iodine level for cost-sensitive applications.
GAC-P S bridges this gap as the acid washed high iodine carbon combining premium capacity with pH neutrality. It offers higher iodine than GAC S while providing the acid-washed stability that standard GAC-P cannot. For ultra-pure water polishing, beverage ingredient water, and POE systems where both high capacity and neutral pH are required, GAC-P S eliminates the need to choose between performance and chemistry stability. Select standard GAC-P for maximum capacity in non-sensitive systems; choose GAC S for standard acid-washed duty; choose acid washed high iodine carbon GAC-P S when both high iodine and pH neutrality are essential.