METALOK®
Solution for Heavy Metal Contamination
Heavy metals are amongst the major pollutants in the environment. Metals occur as pollutants in industrial and domestic waste waters, solid wastes and also pose a major problem with recycling organic waste into compost. They are not degradable and thus can build up in both solid and liquid wastes,and in receiving soils.
METALOK® is a unique product specially developed to manage heavy metal pollution in soils, and solid and liquid waste. METALOK® is a specially formulated integrated mineral compound that is very effective in reducing heavy metal contamination in soils and water.
METALOK® is designed to manage heavy metal pollution effectively in a range of environmental conditions by the integration of several active metal immobilisation mechanisms:
- Precipitation
- Chemisorption
- Adsorption
- Chelation
- Co-precipitation
These mechanisms provide METALOK® with the flexibility and power to effectively deal with metal pollution in most situations.
METALOK® PERFORMANCE
METALOK® has a very high metal absorption capacity as shown in the table and figure below.
Metal Residue in solution after addition of METALOK® to a 400ppm metal solution, concentration of metal adsorbed and the Max. Adsorption Capacity of METALOK®
| Metal |
Residue
mg/l |
In METALOK®
mg/100 g |
Max.Capacity
mg/100g |
| Cadmium |
0.5
|
199.8
|
4000
|
| Chromium |
0.0
|
200
|
14500
|
| Copper |
0.0
|
200
|
15600
|
| Lead |
0.0
|
200
|
>15000
|
| Nickel |
0.9
|
199.6
|
4170
|
| Zinc |
0.2
|
199.9
|
8930
|
Reduction in leachable heavy metals from compost as a result of METALOK®
METALOK® can be applied to:
- Contaminated soils to achieve TCLP test compliance
- Composting of organic wastes, such biosolids or municipal waste, to reduce metal concentration and mobility
- Treatment of metal containing waste waters such as metal plating, photolabs, etc.
BENEFITS OF USING METALOK®
METALOK® offers the following unique advantages for processing liquid metal waste and metal contaminated organic waste and soils:
Liquid Waste
- Rapid removal of heavy metal compounds into solid state
- Easy separation of METALOK® and liquid
- Active at a wide pH range
Organic Waste Recycling
- Reduced total and available metal concentration
- Improves compost soil properties
Contaminated Soils
- In situ immobilisation of heavy metals
- Improved compliance with TCLP test