Sulphate removal from acid rock drainage using steel slag

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Ntuli, F.^1,2 ; Magwa, N.P.^2

Botswana International University of Science and Technology, Private Bag 16, Palapye, Botswana^1

University of Johannesburg, P. O. Box 524, Johannesburg, South Africa^2

关键词: Acid rock drainage;    Adsorption capacities;    Adsorption kinetics;    Basic oxygen furnace slag (BOF);    Langmuir isotherm;    Pseudo second order kinetics;    Residence time;    Temperature increase;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012116/pdf
DOI  :  10.1088/1755-1315/191/1/012116

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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.