Van Roosendael Stijn, Onghena Bieke, Roosen Joris, Michielsen Bart, Wyns Kenny, Mullens Steven, Binnemans Koen
KU Leuven, Department of Chemistry Celestijnenlaan 200F, P. O. box 2404, BE-3001 Heverlee Belgium
SIM vzw Technologiepark 935, BE-9052 Zwijnaarde Belgium.
RSC Adv. 2019 Jun 14;9(33):18734-18746. doi: 10.1039/c9ra02344e.
A novel adsorbent was designed for selective recovery of cobalt(ii) from synthetic binary cobalt(ii)-nickel(ii) and cobalt(ii)-manganese(ii) solutions, a synthetic multi-element solution and a real aqueous waste stream from the petrochemical sector. The adsorbent consisted of shaped activated carbon-alginate spheres impregnated with Cyanex 272. The synthesis was followed by characterisation using SEM, infrared spectroscopy, BET analysis and elemental analysis. Good selectivity for cobalt(ii) over nickel(ii) could be achieved during adsorption, while this was not the case for cobalt(ii) over manganese(ii). Cobalt(ii) and manganese(ii) were therefore fully adsorbed and stripped using a dilute sulphuric acid solution. The adsorbent was shown to be reusable in a column setup. Finally, the adsorbent material was used for the purification of a real aqueous waste stream from the petrochemical sector.
设计了一种新型吸附剂，用于从合成的二元钴（II）-镍（II）和钴（II）-锰（II）溶液、合成多元素溶液以及石化行业的实际含水废物流中选择性回收钴（II）。该吸附剂由浸渍有Cyanex 272的成型活性炭-海藻酸钠球组成。合成后通过扫描电子显微镜、红外光谱、BET分析和元素分析进行表征。在吸附过程中，对钴（II）的选择性优于镍（II），而对钴（II）的选择性优于锰（II）则不然。因此，钴（II）和锰（II）被稀硫酸溶液完全吸附和解吸。该吸附剂在柱装置中显示出可重复使用。最后，该吸附剂材料用于净化石化行业的实际含水废物流。
