Groundwater Arsenic Removal Methods
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- Contact: 李先生
- Tel:18239962987
- Email:280459524@qq.com
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Groundwater Arsenic Removal Method: BKsorb Iron Hydroxide Arsenic Removal Filter Media
Technical Details
BKsorb is a high-purity iron hydroxide adsorbent specifically designed for arsenic removal in drinking water. It requires no chemical additives during use and efficiently removes both trivalent arsenic (As(III)) and pentavalent arsenic (As(V)) from water, ensuring a stable effluent arsenic concentration below 0.01 mg/L (complying with WHO and Chinese drinking water standards).
1. Technical Principle
The core component of BKsorb is β-FeOOH/Fe(OH)₃, which has a high specific surface area (~300 m²/g). It removes arsenic through the following mechanisms:
Adsorption: Numerous active sites capture arsenic ions.
Chemical Bonding: Arsenate/arsenite ions react with Fe(OH)₃ to form stable complexes (FeAsO₄), preventing secondary pollution.
Reaction Equation:
Fe(OH)₃ + H₃AsO₄ → FeAsO₄ + 3H₂O
2. Process Parameters and Operating Conditions
| Parameter | Recommended Value |
|---|---|
| Filter Media Particle Size | 0.2–2.0 mm |
| Packing Height | 80–160 cm (recommended ≥100 cm) |
| Empty Bed Contact Time (EBCT) | 3–5 minutes |
| Filtration Flow Rate | 10–20 BV/h (or 10–20 m/h) |
| Applicable pH Range | 5–9 (optimal adsorption at pH 6.5–7.5, generally no adjustment needed) |
| Effluent Arsenic Concentration | Stable < 0.01 mg/L |
| Service Life | 2–5 years (no regeneration required) |
| Backwashing Conditions | Pressure drop ≥0.5 bar, flow rate 25–26 m/h, duration 5–10 minutes |
3. Process Flow (Applicable to Groundwater/Drinking Water)
Pretreatment (optional): Coarse filtration (≥10 μm) to remove suspended solids.
Filter Media Loading: Fill the filter tank with BKsorb to a height of 100 cm.
Filtration and Adsorption: Control the flow rate to ensure a contact time ≥3 minutes.
Backwashing: Perform water backwashing for 5–10 minutes based on pressure drop or clogging.
Effluent Testing: Confirm arsenic concentration meets standards (< 0.01 mg/L).
Media Replacement: Replace directly upon saturation; no regeneration required.
4. Technical Advantages
High Efficiency and Broad Spectrum: Effective against both As(III) and As(V), no pre-oxidation needed.
Environmentally Safe: Pure adsorption process, no chemical additives, no arsenic-containing sludge.
Economical and Low Maintenance: Low cost per ton of water, service life up to 5 years, easy maintenance.
Strong Adaptability: Operates at ambient temperature (5–40℃), suitable for rural and municipal water supply.
5. Application Cases
Rural Drinking Water Upgrade Project: 30t/h system reduced arsenic from 0.05 mg/L to 0.005 mg/L (a rural project in China).
Water Treatment Plant: Capacity of 10,000 m³/d, suitable for centralized water supply.
| Industry Category | Environment |
|---|---|
| Product Category | |
| Brand: | BK |
| Spec: | BKsorb |
| Stock: | 83000 |
| Manufacturer: | |
| Origin: | China / Jiangsu / Suzhoushi |
