Two mechanisms, one medium
| Mechanism | What it removes | Its limitation alone |
|---|---|---|
| Adsorption (carbon) | Dissolved organics, colour bodies, taste and odour compounds | Capacity is finite; the medium loads up and must be replaced or regenerated |
| Oxide surface activity (ZnO) | Contributes surface activity; under suitable illumination, photocatalytic degradation pathways are reported in the literature | Contact and light conditions govern how much of this is available in a real system |
What to specify for water applications
| Parameter | Why it matters |
|---|---|
| Target contaminants | Dyes, dissolved organics, taste-and-odour compounds and micro-pollutants adsorb differently; this drives carbon selection |
| Water chemistry | pH, ionic strength and competing organics change adsorption behaviour substantially |
| Contact configuration | Powdered dosing, packed bed, coated media or cartridge — each demands a different particle size and morphology |
| Pressure drop / flow | In packed beds, fine powders are an engineering problem; morphology and particle size are specified against it |
| Zinc release limits | If the treated water is potable or discharged to environment, leaching limits apply and must be designed for and verified |
| Regeneration | Single-use versus regenerable changes the whole design target |
Honest scope
Tell us your target spec — we'll tell you if we can make it
This is a tunable composite platform. Describe the application and the numbers you need; we reply with whether and how it can be done.
FAQ
Can a ZnO/activated carbon composite be used in water treatment?
It is one of the most-studied applications for ZnO-carbon composites: the carbon phase adsorbs dissolved organics and colour, and the zinc oxide phase contributes surface activity, with photocatalytic degradation pathways reported under suitable illumination. Real performance depends on target contaminants, water chemistry and contact configuration.
What contaminants does it target?
Adsorption behaviour differs by contaminant, so the target list drives the design. Dyes, dissolved organics and taste-and-odour compounds are typical. Water chemistry matters as much as the contaminant itself, because pH, ionic strength and competing organics change adsorption substantially.
Is it suitable for drinking water?
That has to be established for your jurisdiction and configuration. Zinc leaching limits apply where treated water is potable or discharged, and compliance must be designed for and verified. We supply material and measured data; we do not certify potable-water suitability on your behalf. Tell us at the outset if the application is potable.
Powder dosing or packed bed?
Both are used and they need different grades. Fine powders behave differently in a packed bed, where pressure drop becomes an engineering constraint, so particle size and morphology are specified against the contact configuration you intend.
Do you publish adsorption capacity figures?
Not for this composite, because capacity depends on the grade, the contaminant and the water chemistry. During co-development we measure capacity against your target contaminants in water representative of yours, on the material actually made for you.
※ General technical orientation. Performance depends on grade, target contaminants, water chemistry and contact configuration, and is established during co-development on the material supplied. Regulatory suitability for potable water or discharge must be verified for your jurisdiction and configuration.