Bentonite powder, sodium activated
Specific data collection and process modelling were performed in accordance with ISO 14040 and 14044 series. Process related data were collected from 8 production sites for sodium activated bentonite products located in the EU (28) countries + Morocco + Turkey. The data were then consolidated by process stage (horizontal aggregation). The resulting LCI calculation is based on the activated bentonite production process route and corresponds to generic industry screening results. The electricity model used for the project is representative of the average production of the 28 European countries + Morocco + Turkey. Other upstream data are based on European averages. For modelling and other upstream processes and materials, the Gabi 220.127.116.11 (PE International) database was used whenever possible and the Ecoinvent 2.2 database as second choice. The Gabi 18.104.22.168 software has been used to generate this ELCD data set for bentonite sodium activated granular.
Calcium bentonite is extracted in quarries or pits using conventional mechanical extraction methods. The material is then transported to a crusher for size reduction before being activated with soda ash (either on the fields or in extruders). In the following step the sodium activated bentonite is dried naturally or in rotary kilns. Another transportation may be needed necessary to transport the material to the final processing plant for milling.