Effect of diatomite with different morphologies on the purification guide performance of formaldehyde in Jilin Changbai area

In this paper, diatomite with different shapes (discoid, cylindric and scaphoid) was purified and characterized by SEM and BET. Then diatomite purification materials were prepared and formaldehyde adsorption test was carried out. The results showed that the pore structure of the purified diatomite was improved and the impurities were eliminated effectively. At 48 hours, the formaldehyde purification rate and the formaldehyde purification persistence rate of the diatomite purification materials with different shapes were different. The purification rate of the discoid diatomite purification materials to formaldehyde was 76.67%, the formaldehyde purification effect lasted 58.18%, the formaldehyde purification rate of the scaphoid diatomite purification materials was 85.45%, and the formaldehyde purification effect lasted 69.83%, the formaldehyde purification rate of cylindric diatom purification material is 88.89%, and the lasting rate of formaldehyde purification effect is 77.10%.