Whiteness improvement of ground calcium carbonate via sodium dithionite-sodium citrate-sulfuric acid treatment and mechanism study

Volume: 630, Pages: 127538 - 127538
Published: Dec 1, 2021
Abstract
To widen applications of ground calcium carbonate (GCC), it is crucial to improve whiteness and remove the black-colored impurities (Fe, Mn and Zn) from GCC powders. Herein a new strategy termed as sodium dithionite-sodium citrate-sulfuric acid treatment (DCS) was developed to whiten natural GCC powders, and the whiteness was improved from 85% to 95.6%. The DCS strategy was adopted by washing GCC with aqueous solution of sodium dithionite,...
Paper Details
Title
Whiteness improvement of ground calcium carbonate via sodium dithionite-sodium citrate-sulfuric acid treatment and mechanism study
Published Date
Dec 1, 2021
Volume
630
Pages
127538 - 127538
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