Adsorption of Cu, Cd, Zn and Pb Ions from Aqueous Solutions by Electric Arc Furnace Slag and the Effects of pH and Grain Size

作者：Chen, X.; Hou, W. H.^*; Song, G. L.; Wang, Q. H.

来源：Chemical and Biochemical Engineering Quarterly, 2011, 25(1): 105-114.

• EAF slag
• heavy metal ions
• adsorption
• pH
• grain size

The study was carried out to investigate the adsorption kinetics and equilibrium of four heavy metal ions (Cu(2+), Cd(2+), Zn(2+) and Pb(2+)) on two kinds of electric arc furnace slag (EAF slag). The adsorption capacity of the Shougang slag (SG slag) is more than that of the Baoshan slag (BS slag). The metal adsorption on the EAF slag is more akin to the first-order kinetic model. Experimental data confirmed that Freundlich model was better in describing the metal adsorption on SG slag, while Langmuir model was more applicable for BS slag. The adsorption of metal ions increased with the pH value and reached a maximum at a 7 value for the Zn(2+) and Pb(2+) adsorption on SG slag. The decrease of grain size could enhance the adsorption of metal ions. The results established the potential use of EAF slag as costly adsorbents for heavy metal from contaminated wastewaters.

• 出版日期2011-3
• 单位山东理工大学; 北京科技大学; 中国环境科学研究院