Location and composition of silicon derivatives in rice straw pulp obtained by organic acid pulping

摘要

Cooking of rice straw in a mixture of formic acid / acetic acid / water, results in the retention of silicon derivatives in the pulp. Study of the various morphological fractions of the pulp by Scanning Electron Microscopy equipped with Energy Dispersive Spectrometry, shows that the silicon derivatives are essentially localised in epidermic cells where they occur as silica and calcium silicate.