CH540
CH540 is a macroporous polystyrene resin loaded with nano iron oxide particles. Main application: arsenic removal (effluent arsenic < 8 ppb). Key advantages: nano iron-oxide loading, good bead strength, low pressure drop, and no backwashing required under typical operation.
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Product Introduction
CH540 is a macroporous polystyrene resin loaded with nano iron oxide particles. Main application: arsenic removal (effluent arsenic < 8 ppb). Key advantages: nano iron-oxide loading, good bead strength, low pressure drop, and no backwashing required under typical operation.
Typical Physical & Chemical Properties
| Polymer matrix | Polystyrene crosslinked with divinylbenzene |
|---|---|
| Appearance | Brown spherical granules |
| Particle size distribution | 300 - 1200 µm |
| < 300 µm (max) | 1 % |
| Uniformity coefficient (max) | 1.7 |
| Packaging density (approx.) | 790 - 820 g/L (49.4 - 51.2 lb/ft³) |
| Operating temperature range | 80 °C (176.0 °F) |
| pH range (in operation) | 4.5 - 8.5 |
Handling, Storage & Loading Notes
- Transport & storage. Store the resin in its wet state, preferably above 0 °C. For long idle periods, keep the container closed or add brine of ≥5% NaCl. Protect from freezing during transport, and do not stack heavy objects on top of the resin to avoid crushing the beads.
- Pre-treatment. For general requirements, one alkaline → water → acid → water cycle is sufficient; for strict requirements, perform three cycles and finish with the required ionic form.
- Loading. Allow for the swelling on form conversion and leave enough freeboard to prevent overflow while keeping a proper liquid level. Keep the column aspect ratio in a reasonable range to avoid channeling. Load wet or backwash to remove air bubbles from the bed.
- Feed quality. Before entering the resin column, the liquid should be coagulated, filtered or sand-filtered to ensure it is free of suspended solids that could clog the resin pores.
- Idle columns. Resin left idle in a column for a long time must be washed out and stored clean, or kept submerged in brine; it must never dehydrate. Backwash from time to time to loosen the bed and prevent caking.