Product Overview
PSD-A1 S is the acid-washed variant of our enhanced coconut shell carbon, combining the superior adsorption capacity of PSD-A1 with the process stability of acid-washed purification. With an iodine adsorption value exceeding 1100 mg/g, surface area above 1000 m²/g, and ash reduced below 3%, this grade targets the most sensitive water treatment applications—including POU drinking water filters, semiconductor rinse water, and electroplating bath maintenance.
The acid-wash step neutralizes surface alkalinity to a pH of 5–8, preventing pH drift in closed-loop systems and protecting delicate downstream equipment. Available in 12×40 mesh and other standard sizes, PSD-A1 S is certified for NSF 61, drinking water, and food production, ensuring compliance across regulated industries.
Key Application Areas
- Point-of-Use (POU) Drinking Water Filters — Delivers high-capacity chlorine and organic removal in undersink and countertop units while maintaining neutral pH effluent for consumer safety and taste.
- Semiconductor Ultra-Pure Water — Polishes ultra-pure water for wafer cleaning and wet processing, where trace metals and pH excursions are strictly controlled to prevent yield loss.
- Electroplating & Surface Finishing — Circulates in plating bath loops to adsorb organic brightener breakdown products without altering bath pH or introducing metallic contaminants that affect deposit quality.
- Food & Beverage Ingredient Water — Provides the highest purity tier for premium bottled water, craft brewing, and pharmaceutical ingredient preparation where acid-washed purity meets direct-contact standards.
Specifications
| Technical Specifications | PSD-A1 S | Unit |
|---|---|---|
| Iodine Adsorption Value | >1100 | mg/g |
| Moisture Content | <10 | % -wt |
| Ash Content | <3 | % -wt |
| Bulk Density | 430~530 | kg/m³ |
| pH | 5-8 | - |
| Crush Strength | >95 | % |
| Specific Surface Area | >1000 | m²/g |
| Particle Size >12 Mesh (1.70 mm) | <10 | % -wt |
| Particle Size <40 Mesh (0.43 mm) | <5 | % -wt |
Available particle size
- 8×20 Mesh ( 0.85 ~ 2.36 mm)
- 8×30 Mesh ( 0.6 ~ 2.36 mm)
- 12×30 Mesh ( 0.6 ~ 1.7 mm)
- 20×40 Mesh ( 0.43 ~ 0.85 mm)
- 30×60 Mesh ( 0.25 ~ 0.6 mm)
- 80 ~ 200 Mesh ( 0.075 ~ 0.18 mm)
- Other customized particle sizes
Packaging
- The 25kg / Package
- The 500 kg / Package
Key Advantages
- Maximum Capacity + Maximum Purity: The only grade in the PSD-A series combining >1100 mg/g iodine with <3% ash and pH-neutral chemistry, eliminating trade-offs between capacity and purity.
- Electronics-Grade Compatibility: Acid washing removes leachable ions that could cause conductivity spikes in UPW and plating loops, supporting yield-sensitive manufacturing.
- POU-Optimized Chemistry: Neutral pH prevents alkaline "spikes" common in standard carbons during initial flush, improving consumer experience in residential filters.
- Proven Supply Chain: Manufactured from the same traceable coconut shell feedstock as all PSD-A grades, with batch certificates confirming iodine, ash, and pH compliance.
How PSD-A1 S Delivers Acid Washed High Iodine Carbon POU Performance
The most sensitive water treatment applications demand two attributes that are often mutually exclusive: maximum adsorption capacity and maximum chemical purity. Standard high-capacity carbons may achieve >1100 mg/g iodine but retain alkaline ash that disrupts pH-sensitive processes. Acid-washed standard carbons may achieve pH neutrality but sacrifice capacity during the washing process.
Combining the extended activation protocol of PSD-A1 with a rigorous acid-wash step resolves this dilemma. The washing removes soluble minerals while preserving the enhanced micropore structure. The result is the only grade in the PSD-A series combining >1100 mg/g iodine with <3% ash and pH 5–8. In semiconductor wet processing, this prevents conductivity spikes and trace metal introduction that could affect wafer yield. In POU drinking water filters, the neutral pH eliminates alkaline "spikes" during initial flush, improving consumer taste experience and protecting residential plumbing. In electroplating baths, the ultra-low leachable content maintains bath chemistry stability while adsorbing organic brightener breakdown products.
PSD-A1 S vs PSD-A0 S and Standard PSD-A1
PSD-A0 S provides excellent pH-neutral performance for standard POU and sensitive process water, yet in high-organic-loading environments or extended-service designs, the additional 10–15% capacity margin of PSD-A1 S can mean the difference between on-schedule maintenance and unplanned breakthrough. Standard PSD-A1 delivers the same enhanced capacity but lacks the acid-washed purity required for electroplating, semiconductor rinse water, and premium POU systems where pH excursions are strictly prohibited.
PSD-A1 S bridges this gap as an acid washed high iodine carbon POU grade that refuses the traditional compromise between capacity and purity. It is specifically selected when the application demands both the highest adsorption margin and the most stable water chemistry. For standard POU where 1000 mg/g suffices, PSD-A0 S remains the practical choice. For general high-duty water where pH is not critical, PSD-A1 provides the capacity upgrade. Choose acid washed high iodine carbon POU PSD-A1 S when your specification sheet requires both >1100 mg/g iodine and pH 5–8—whether in semiconductor UPW, electroplating circulation, or premium residential filtration where only the best will suffice.