Sulphate removal from acid rock drainage using steel slag

F. Ntuli, N. P. Magwa

Research output: Contribution to journalConference articlepeer-review

3 Citations (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 (25-45C), 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 45C 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
JournalIOP Conference Series: Earth and Environmental Science
Issue number1
Publication statusPublished - 5 Nov 2018
Event4th International Conference on Water Resource and Environment, WRE 2018 - Kaohsiung City, Taiwan, Province of China
Duration: 17 Jul 201821 Jul 2018

ASJC Scopus subject areas

  • General Environmental Science
  • General Earth and Planetary Sciences


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