Abstract
The authors investigated the adsorbability of formaldehyde by collagen fibers which had been obtained by fiber-separation of hide having low quality for leather material, with the purpose of their utilization as a air filtering adsorbent. Collagen fibers adsorbed formaldehyde by 2% from the vapor of 10-times diluted formalin. Their adsorbability was stronger than active carbon and further increased by the alkali treatment of fibers. Their adsorbability was also strong at higher pH value and was hardly affected by chrome tanning.
