Three bentonite clays from deposits located in Brazil were used to study the pillar parameters such as the use of heating in the synthesis of the pillar agent; it was verified the feasibility of controlling the density of ...

Clays are natural, earthy and widely available in nature. They have in their composition the clay minerals and various impurities. These impurities can interfere in their applications and the use of synthetic clay appears ...

Four clays from deposits located in the northern state of Paraiba, Brazil, were processed in order to decrease the amount of impurities naturally presented in these materials. Later these materials were characterized along ...

The constant use of contaminating materials, often being incorrectly disposed of in the environment, is something that has been worrying society, and "environmental preservation" is one of the most debated topics in ...