Adsorption of Low Concentration Formaldehyde in Air Using Ethylene-Diamine-Modified Diatomaceous Earth

10.4209/aaqr.2015.05.0292

Dante P. Bernabe；Raissa Anne S. Herrera；Bonifacio T. Doma Jr.；Ming-Lai Fu；Yingchao Dong；Ya-Fen Wang

Calibration curve ； Breakthrough point ； Material synthesis ； Amine ； Indoor air pollution

Aerosol and Air Quality Research

15卷4期（2015 / 08 / 01）

1652 - 1661

英文

Formaldehyde is one of the most common difficult-to-eliminate indoor air pollutants. Among the available methods of eliminating formaldehyde, adsorption is still the most commonly used due to its simplicity, efficiency, and economic viability. This study investigated the potential of diatomaceous earth (DE) adsorbent for formaldehyde (low concentration in air). DE was considered because of its high silica content and high porosity. It also examined the effect of adding ethylene-diamine (EDA) on the adsorption performance of DE. Amine groups have been proven to improve the adsorption of formaldehyde through their reaction that produces imine. The amount of added EDA was varied from 0.25 to 0.75g per gram of DE. For pure DE adsorbent, the adsorption performance was 298mg/g. Adding 0.75 g of EDA resulted in maximum DE adsorption performance (565mg/g). EDA-modified DE was shown to be a potential adsorbent for removing formaldehyde in air.