Removal of lead and chromium by activated slag -- A blast-furnace waste
- Univ. of Roorkee (India). Chemistry Dept.
The blast-furnace waste generated in steel plants has been converted into a low-cost adsorbent. The resulting activated slag has been characterized and used for the removal of lead and chromium. The effect of pH, sorbent dosage, adsorbate concentrations, presence of other metal ions, temperature, and contact time on the sorption of lead and chromium were studied in batch experiments. Kinetic studies were undertaken to have an idea of the mechanistic aspects of the process. The uptake of lead is found to be greater than that of chromium. Adsorption on activated slag follows both Freundlich and Langmuir models. In addition, a series of fixed-bed experiments were performed in an attempt to simulate industrial conditions. The bed-depth-service-time (BDST) model proposed by Hutchins was successfully applied to the sorptive removal of lead. Some experiments were also performed with a view to recover Pb{sup 2+} and chemically regenerate the spent slag columns in situ.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 495407
- Journal Information:
- Journal of Environmental Engineering, Vol. 123, Issue 5; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Equilibrium uptake, sorption dynamics, process optimization, and column operations for the removal and recovery of malachite green from wastewater using activated carbon and activated slag
Removal of Hexavalent Chromium in Portland Cement Using Ground Granulated Blast-Furnace Slag Powder