Magnetic separation of ferrite sludge from a wastewater purification process

被引:12
作者
Barrado, E [1 ]
Prieto, F
Ribas, J
López, FA
机构
[1] Univ Valladolid, Fac Sci, Dept Analyt Chem, E-47005 Valladolid, Spain
[2] Univ Valladolid, Fac Sci, Dept Inorgan Chem, E-47005 Valladolid, Spain
[3] CSIC, Natl Ctr Met Res, Dept Mat Recycling, E-28040 Madrid, Spain
关键词
ferrite sludge; heavy metals; magnetic separation; wastewater;
D O I
10.1023/A:1005176228953
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The purification of wastewater containing dissolved metal ions by in situ precipitation gives rise to a sludge composed mainly of ferrites MeXFe3-xO(4) (where Me represents the existing metal ions in the wastewater). Oxides, iron oxy-hydroxides and other impurities are also present in the sludge in smaller proportion. The present investigation proposes magnetic separation of the sludge to recover the ferrites for their possible re-use. Under optimum operating conditions of the magnetic separator, a recovery efficiency of the magnetic fraction in excess of 99% and a high degree of selectivity were obtained.
引用
收藏
页码:385 / 394
页数:10
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