Open AccessAlternative Sorbents for the Cobalt-Containing Wastewater Treatment
Author(s) -
S L Fux,
S. V. Devyaterikova
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1079/6/062042
Subject(s) - sorbent , cobalt , sorption , fly ash , materials science , waste management , wastewater , sewage treatment , pulp and paper industry , chemical engineering , chemistry , metallurgy , adsorption , composite material , organic chemistry , engineering
Electroplating industry cobalt-containing wastewater treatment solutions have been found. We have opted for the reactant method of chemical treatment. We have precipitated cobalt (2+) as cobalt stearate, which we propose to use in lubricants mixed with paraffin, high-pressure polyethylene and ultrafine polytetrafluoroethylene, thus resulting in a material, possessing lower rolling friction coefficient than polytetrafluoroethylene. We have resorted to the ion-exchange method as a means of physico-chemical treatment. This method has made it possible to lower the wastewater cobalt (2+) ion concentration to the MPC h.h..(Maximum Permissible Concentration for Households). We propose the use of waste products of timber-processing (lignin) and power-producing (ash, fly ash) industries as sorbents. The mix of slag, fly ash and hydrolised lignin has been found to be the most efficient cobalt ion sorbent for the sorption method. Upon the sorbent treatment, it can be burnt in a furnace, while the ash can be stored in a sludge collector without any heat treatment.