Facile preparation of MnO2 functionalized baker’s yeast composites and their adsorption mechanism for Cadmium

Rapid removal of Pb2+ from aqueous solution by phosphate-modified baker's yeast

“…These results suggested that the phosphate in PMBY composites may be in a non-stoichiometric and amorphous phase. 20 The results were assigned to the content of phosphate in PMBY, which did not reach XRD's detection limit (5 wt%), whereas the crystallization of these was poor and not within the detectable range. 38 The elemental analysis of the samples show that PMBY contains 45.02% C, 34.470% O, 8.160% H, 8.41% N and 0.53% P, respectively.…”

“…18 Therefore, it is necessary to improve the adsorption performance of yeast cells, especially with regards to the adsorption of lead. A number of modied strategies, such as the formation of nano-MnO 2 /nano-ZnO and hydroxyapatite on the yeast surface, [19][20][21] modication of EDTAD/ethylenediamine/polymer, [22][23][24] and pretreatment using ethanol/caustic have been proposed to improve the adsorption capacity of yeast. 25 Surface modications of yeast with organic and inorganic materials provide a hybrid material having higher efficiency and capacity for the removal of heavy metals by either introducing or exposing more surface functional groups on the surface of raw materials.…”

Baker’s yeast-MnO2 composites as biosorbent for Malachite green: An ecofriendly approach for dye removal from aqueous solution

“…Baker's yeast (Saccharomyces cerevisiae) is an inexpensive and readily available source of biomass used to remove pollutants from wastewater. It has been used efficiently to remove radionuclides (Kedari et al, 2001), heavy metals (Xia et al, 2015) and textile dyes (Yu et al, 2009;Castro et al, 2017) with minimal or no impact to the environment. Biomass of S.…”

“…In order to obtain a better understanding of the biosorption mechanisms for future applications in real scale, the kinetics, isotherm and thermodynamics of dye removal were also studied. The preparation of yeast-MnO2 composites was first described by Xia et al (2015) and involved the direct oxidation of baker's yeast biomass with KMnO4 under acidic conditions. This modification was first tested for Cd 2+ removal and to the best of our knowledge, it has not been used yet for cationic dye removal from aqueous solutions.…”

Recovery of silica from sodium silicate solution of calcined boron mud

“…In this process, desilication of calcined BM was first implemented by using molten sodium hydroxide-based treatment under atmospheric pressure [11][12][13][14]. The sodium silicate solution obtained from this treatment was used for preparing highpurity silica products by carbonation, and the Mg-rich desilicated slag may be used as a raw material to produce high-purity magnesium products.…”