Removal of cobalt (II) ions from aqueous solution by using alternative adsorbent industrial red mud waste material

Abstract

This study on the removal of cobalt ions from aqueous solutions by red mud was conducted in batch condition. Its objective was to investigate the possibility of using red mud waste material as an alternative to high cost commercial adsorbent materials for the removal of cobalt from aqueous solution. In this study, batch experiments were carried out for the adsorption of cobalt onto red mud industry waste. The red mud waste material was successfully used for the removal of cobalt ion from aqueous solution and the technique appears industrially applicable and viable. The potential of economically cheap waste materials like red mud was assessed for cobalt adsorption from aqueous solutions. The operating variables studied were contact time, initial solution pH, initial metal concentration, temperature and adsorbent dosage. The experimental investigation results show that activated red mud has a high level of adsorption capacity for cobalt ion. The adsorption data was correlated with the Langmuir and Freundlich isotherm models. It was found out that the Langmuir and Freundlich isotherms fitted well to the data. Consequently, it was concluded that the red mud can be successfully used for the removal of the cobalt ions from the aqueous solutions with heavy metals.

Synthesis and Characterization of Biodegradable Poly(vinyl alcohol)-Chitosan/Cellulose Hydrogel Beads for Efficient Removal of Pb(II), Cd(II), Zn(II), and Co(II) from Water

“…The reduction in the number of ions removed with increasing temperature showed that adsorption was exothermic and favored a low temperature. Our results are in complete agreement with those of other scholars [ 51 , 53 , 54 ].…”

Using red mud as a sorbent for heavy metal cations

“…Турски црвени муљ (Seydisehir Aluminum Plant, Konya, Turkey), третиран кувањем вишеструко испраног муља у 10% Hcl, показао се као успешан сорбент јона Cu и Co из синтетичких водених раствора и загађене речне воде, а примењена техника оцењена је као индустријски примењива и одржива. Ефикасност сорпције повећавала се са повећањем времена, температуре, pH и масе сорбента, а смањила са повећањем почетне концентрације адсорбата (Nadaroglu et al 2010;Nadaroglu et al 2012). Ефикасност уклањања металних јона помоћу третираног турског црвеног муља у великој мери зависила је од pH средине (Сл.…”

“…12.9. Variation of cobalt ions concentration in polluted water and synthetic solution after red mud treating (Nadaroglu and Kalkan 2012) Црвени муљеви са различитих локалитета испитивани су као потенцијални сорбенти за уклањање јона никла из водених раствора и отпадних вода (Apak and Ünseren 1987;Zouboulis and Kydros 1993;Lópezet al 1998 Иницијална концентрација јона метала снажно је утицала на сорпциону кинетику и равнотежно време. Додатак од 5 g/l RBRM, при иницијалном pH 5, изазвао је 100%-но уклањање из раствора концентрације 10 -4 -510 -4 mol/l, док се са даљим повећањем концентрације Ni 2+ јона до 810 -3 mol/l, ефикасност смањила до 26% (Сл.…”

“…12.7. Removal of copper (а) and cobalt (b) as a function of initial pH(Nadaroglu et al 2010;Nadaroglu and Kalkan 2012)…”

Preparation, Characterization and Water Treatment Application of Electro-spun Polyamide 6 Nanocomposite

“…The adsorption isotherms for cobalt and chromium removal were studied using the best conditions obtained from experimental work with a constant PA6/CaO-gAA amount of 30 mg/20 mL of adsorbate, a metal ions concentration of 10 ppm at pH 5, and a constant magnetic stirring time of 150 min, and the temperature of the solution was 30°C. Afterword; The Langmuir and Freundlich isotherms were used to fit the obtained data [51].…”