TY - JOUR
AU - Xu, Shiqin
AB - With the air pollution control standards getting increasingly stricter, gas cleaning processes with higher capture efficiency of pollutants in iron-ore sintering gas cleaning were applied in China, and fine residue, an emerging hazardous waste containing high content of heavy metals as well as Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were produced. Disposal of the residues in secure landfill after adequate solidification/stabilization was the main solution. The feasibility of solidification/stabilization process using cement and chelating agent was investigated in this study. Leaching concentration of Lead (Pb) and Selenium (Se) exceeded the identification limit, and the content of PCDD/Fs was rather low, so the immobilization of Pb and Se was the main objective of solidification/stabilization. The result showed that leaching concentrations of Pb in the solidified products were lower than 5 mg/L when the addition of cement was 20 % or chelating agent 1 %. However, leaching concentration of Se fluctuated between 0.6 and 0.8 mg/L even the cement addition reached 45 % or chelating agent 3 %. Geochemical modelling using PHREEQC indicated that Se in the residue mainly existed as highly soluble SeO4
2−.
TI - Characterization and solidification/stabilization of iron-ore sintering gas cleaning residue
JF - Journal of Material Cycles and Waste Management
DO - 10.1007/s10163-014-0312-4
DA - 2014-09-30
UR - https://www.deepdyve.com/lp/springer-journals/characterization-and-solidification-stabilization-of-iron-ore-AFibEvOjP8
SP - 790
EP - 797
VL - 17
IS - 4
DP - DeepDyve
ER -