Sulphate removal from acid rock drainage using steel slag

F. Ntuli, N. P. Magwa

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The removal of sulphates from acid rock drainage (ARD) using basic oxygen furnace (BOF) slag was investigated. The results indicated that sulphates removal using BOF-slag increased with temperature increase (25-45°C), time (0-24 h) and solid loading (2-12 g BOF-slag/50 ml ARD). The maximum sulphate removal was 65% when 12 g BOF-slag/100 ml ARD was used at 45C and 24 h residence time. Adsorption followed the Langmuir isotherm with maximum adsorption capacities at 25, 35 and 45°C of 1.949, 1.967, 4.078 mg/g respectively and RL values less than 0.3, indicating adsorption was thermodynamically favourable. The adsorption kinetics followed the pseudo second order kinetics.

Original languageEnglish
Article number012116
Number of pages6
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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