فهرس المقالات ZnO supported on LECA حرية الوصول المقاله صفحة الملخص نص كامل 1 - The removal of Hexavalent chromium; (Cr (VI)) by ZnO/LECA as a nano photocatalyst using full factorial experimental design Aref Shokri Safoora Karimi 10.22034/jna.2021.1906290.1223