Open AccessMill Scale as an Industrial Solid Waste for Preparing Iron Nano-Metal Powder as a Value-Added Product
Author(s) -
T.A.A. El-barbary
Publication year - 2022
Publication title -
letters in applied nanobioscience
Language(s) - English
Resource type - Journals
ISSN - 2284-6808
DOI - 10.33263/lianbs122.038
Subject(s) - mill scale , leaching (pedology) , sodium borohydride , iron powder , chemistry , metallurgy , metal , iron sulfate , materials science , nuclear chemistry , sulfate , catalysis , organic chemistry , environmental science , soil science , soil water
A mill scale as a solid waste of the steel industry was used to obtain valuable products through hydrometallurgical processes. Mineral acids were employed for leaching the iron content. The affecting parameters of the leaching process such as solid/liquid ratio, temperature, time, and acid type and concentration were investigated. A 95% iron content was dissolved using 20% HCl at 60°C for 2 hrs. The process follows the liquid film kinetic model. Nano-iron powder was obtained by chemical reduction of the dissolved iron using sodium borohydride and polyacrylic acid at pH 9.5. The produced nano-iron can be employed as anti-bactericidal.