Removal of sulfides from water using a hybrid ion exchanger containing manganese(IV) oxide
Łukasz Wilk , Agnieszka Ciechanowska , Elżbieta Kociołek-Balawejder
AbstractA hybrid ion exchanger (HIX) containing manganese(IV) oxide based on a macroporous, strongly basic anion exchanger as supporting material was obtained. The introduced MnO2 (26.4% Mn) was amorphous and evenly distributed within the polymer matrix. The hybrid material was used for removal of sulfides from anoxic aqueous solutions with 100–500 mg S2–/dm3 concentrations and pH in the range 12.0–14.0. The highest sorption capacity exhibited by the sorbent was 152.0 mg S2−/g. Approximately 60% of dissolved sulfides were oxidized to S2O3 2 − and repelled from the HIX structure to the aqueous phase of the examined systems, whereas 15% was bound with the sorbent beads in the form of polysulfides. Based on the identified sulfide adsorption and oxidation products, the mechanism of the sulfide removal process using synthesized hybrid material is suggested.
|Journal series||Separation and Purification Technology, ISSN 1383-5866, e-ISSN 1873-3794, (N/A 140 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Anion exchanger, Hybrid ion exchanger, Manganese(IV) oxide, Reductive dissolution, Sulfide removal|
|Publication indicators||= 0; = 0; : 2016 = 1.394; : 2018 = 5.107 (2) - 2018=4.551 (5)|
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