Harmless treatment and selective recovery of acidic Cu(II)-Cr(VI) hybrid wastewater via coupled photo-reduction and ion exchange

Efficient removal of radiocobalt and manganese from their binary aqueous solutions by batch adsorption process using PAN/HDTMA/KCuHCF composite

“…The two diffraction peaks observed at 2θ of 17.1°and 29.8°for PAN indicates its crystalline structure. This obtained XRD pattern of PAN agrees well with those reported in literature [13][14][15][16][17][18][19][20][21][22][23][24][25]. The XRD pattern of KCuHFC showed diffraction peaks at 2θ of 17.5°, 24.9°, 35.8°, 39.9°, 43.9°, 51.3°, 54.7°and 57.8°, which are characteristic peaks for crystalline metal ferrocyanides [26,27].…”

“…By foam separation technique, Mahmoud and Lazaridis [14] efficiently removed 63 Ni 2+ and 51 CrO 4 2− from radioactive process wastewater. A two-step method combining adsorption and photoreduction was applied by Yan et al [15] for simultaneous removal of Cu 2+ and Cr 2 O 7 2− . Simultaneous removal of As 3+ and SO 4 2− was investigated by Matos et al [16] using immobilized non-traditional sulfate-reducing bacteria mixed culture and alternative low cost carbon sources.…”

Photocatalysis for Heavy Metal Treatment: A Review

“…Among heavy metal ions, the treatment of Cr(VI) ions is the most studied. Some works have been published on the photocatalytic reduction of Cr(VI) using TiO 2 -, ZnO-, CdS-, and ZnS-based catalysts [16,[50][51][52][53][54][55][56][57][58][59][60][61][62]65].…”

Photoreduction properties of novel Z-scheme structured Sr0.8La0.2(Ti1−δ4+Tiδ3+)O3/Bi2MoO6 composites for the removal of Cr(vi)

“…S7(b) and (c) † indicate that only Cr(III) species (576.96 eV and 586.90 eV) exist on the surface of the used LSTBM7 photocatalyst. 58,59 Since Cr(OH) 3 is a grey-green color, 9 it can be concluded that it is Cr(OH) 3 is deposited on the surface of LSTBM7 aer the photoreduction of Cr(VI) solution. The chemical reaction of the used LSTBM7 around 472 C, exhibited in TG and DTG curves (Fig.…”