Product Overview
GAC SQ is a premium acid-washed coal-based granular activated carbon purpose-built for high-purity water treatment applications. Sourced from select bituminous coal, it undergoes carbonization, steam activation, and rigorous multi-stage acid washing to remove residual ash and extractables. The result is a consistent neutral pH of 5–8, paired with high-performance adsorption: iodine value >950 mg/g and methylene blue >160 mg/g.
Available in two particle configurations—GAC 830 SQ (coarser grade) and GAC 1240 SQ (finer grade)—this grade meets the strictest purity standards. It is specifically designed for electronics-grade ultra-pure water systems, food and beverage processing, and point-of-entry water purification, where low leachable metals, pH stability, and reliable organic contaminant removal are essential.
Key Application Areas
- Ultra-Pure Water Systems — Polishes deionized water for semiconductor and electronics manufacturing, removing trace organics and chlorine without introducing ionic contamination.
- Beverage & Brewery Water Treatment — Purifies process water for beer, soft drinks, and bottled water production, ensuring consistent flavor and compliance with food-grade standards.
- Point-of-Entry (POE) Drinking Water — Installed at building entry to remove chlorine, taste, and organic contaminants while maintaining neutral pH effluent for residential and commercial systems.
Specifications
| Technical Specifications | GAC 830 SQ | GAC 1240 SQ | 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 for Electronics & Food Grade: pH 5–8 and reduced ash minimize conductivity spikes and metal leaching, protecting sensitive semiconductor processes and food-contact systems.
- Dual Performance Indicators: Iodine >950 mg/g ensures rapid dechlorination and small-organic removal; methylene blue >160 mg/g confirms capacity for larger color and organic molecules.
- Dual Mesh Flexibility: GAC 830 SQ (1.4–1.7 mm) optimizes high-flow POE systems; GAC 1240 SQ (1.2–1.4 mm) enhances contact efficiency for ultra-pure water polishing.
- Coal-Based Economics with Premium Purity: Bituminous coal base provides cost-effective high capacity, while acid washing achieves purity levels approaching coconut shell grades.
How GAC SQ Achieves Acid Washed Coal Carbon Ultra Pure Water Performance
Electronics-grade ultra-pure water systems, semiconductor fabrication, and sensitive food processing require not just high adsorption capacity, but minimal leachable metals, stable pH, and consistent batch quality. Standard or lightly acid-washed carbons may still release trace ions that cause conductivity fluctuations in highly sensitive closed-loop systems.
GAC SQ solves this through rigorous multi-stage acid washing. The acid washed coal carbon ultra pure water protocol targets soluble ash, metal ions, and alkaline residues that simpler washes miss. The result is <3% ash, pH 5–8, and reduced extractable content that protects sensitive semiconductor processes, food-contact systems, and electroplating baths. The dual performance indicators—iodine >950 mg/g for rapid dechlorination and methylene blue >160 mg/g for larger organics—ensure comprehensive contaminant removal without compromising purity.
GAC SQ vs Standard GAC S Acid-Washed Carbon
GAC S is the standard acid-washed grade with >900 mg/g iodine and >150 mg/g methylene blue, suitable for general ultra-pure water and food-grade applications. However, for the most critical electronics-grade systems or high-throughput beverage plants, the additional capacity and tighter purity of GAC SQ provide measurable performance advantages.
GAC SQ bridges this gap as the premium acid washed coal carbon ultra pure water solution. It delivers higher iodine and methylene blue values than GAC S while maintaining the same pH-neutral, low-extractable profile. For semiconductor UPW, premium beverage processing, and any application where maximum capacity and minimum contamination are both required, GAC SQ provides the optimal balance. Choose GAC S for standard sensitive duty; select GAC SQ for the most demanding acid washed coal carbon ultra pure water applications where batch consistency and peak performance are essential.