Adsorption of Al, Cr and Zn from a wastewater effluent using basic oxygen furnace slag

F. Ntuli, T. Falayi

Research output: Contribution to journalConference articlepeer-review


Adsorption of Cr, Al and Zn from a powder coating aluminium process wastewater was achieved using Basic oxygen furnace slag (BOFS) as an adsorbent. Batch adsorption studies were used to investigate the effects of solid-loading effect, temperature and contact time on adsorption. Highest metal removal was obtained at a solid-loading of 4% m/v. The adsorption equilibrium time was 60, 80 and 100 mins for Zn, Cr and Al respectively. The adsorption of these metals onto BOFS was satisfactorily modelled using pseudo second order kinetics and Langmuir isotherm. The metal loaded BOFS could successfully be re-used three times before regeneration. The removal rate was 98.4%, 85.5% and 90.2% for Zn, Al and Cr respectively. BOFS can successfully be used to remove metal contaminants in effluent water as the residual metal concentration after 120 min agitation at 4% m/v solid loading was Zn 0.7%, Al 2.67% and Cr 3.4%.

Original languageEnglish
Article number012112
JournalIOP Conference Series: Earth and Environmental Science
Issue number1
Publication statusPublished - Nov 5 2018
Event4th International Conference on Water Resource and Environment, WRE 2018 - Kaohsiung City, Taiwan, Province of China
Duration: Jul 17 2018Jul 21 2018

All Science Journal Classification (ASJC) codes

  • General Environmental Science
  • General Earth and Planetary Sciences


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