Open AccessRecycling of a wastewater to iron oxide micro structures
Author(s) -
G. Horváth,
Zsolt Szalay,
František Šimo,
Kristián Šalgó,
František Krčma,
Simona Matejová
Publication year - 2019
Publication title -
environmental research communications
Language(s) - English
Resource type - Journals
ISSN - 2515-7620
DOI - 10.1088/2515-7620/ab37c1
Subject(s) - maghemite , hematite , materials science , iron oxide , magnetite , oxide , microstructure , electrochemistry , anode , chemical engineering , wastewater , metallurgy , iron powder , crystallinity , electrode , chemistry , waste management , composite material , engineering
The proposed work describes new perspectives for recycling of a salty industrial wastewater to micro-structured iron oxides with capturing potential for minor carbon- and metallic contaminations. By-products generated by electrochemical treatment of a rubber wastewater with sacrificial steel anode were separated, dried, desalinated, and thermally processed at 800 and 1100 °C in a nitrogen atmosphere to investigate the effects of chemically bound oxygen on iron oxide formation. The obtained powder products were different phases of iron oxides, such as hematite, maghemite, magnetite; depending on the annealing temperature. All of the phases are interesting from a recycling point of view, the microstructure, elementary composition and crystallinity of the solid products before and after thermal treatment were investigated via SEM-EDX and PXRD techniques.