Removal of Hexavalent Chromium from Aqueous Solutions by Adsorption on Thermally Modified and Non-Modified Eggshells. jcoeng [Internet]. 2013 Dec. 1 [cited 2025 Apr. 26];19(12):1661-72. Available from: https://www.joe.uobaghdad.edu.iq/index.php/main/article/view/2422