Removal of Hexavalent Chromium from Aqueous Solutions by Adsorption on Thermally Modified and Non-Modified Eggshells. jcoeng [Internet]. 2013 Dec. 1 [cited 2024 May 20];19(12):1661-72. Available from: https://joe.uobaghdad.edu.iq/index.php/main/article/view/2422