Review Article
Study of Modern Nano Enhanced Techniques for Removal of Dyes and Metals
Table 4
Simultaneous removal of heavy metals and organic contaminants by nanophotocatalysts.
| | Synergistic system | Organic contaminants | Heavy metals |
Maximum removal (%) |
Removal method |
Time for maximum removal (min) | References | | O.C. | Heavy metals | O.C. | Heavy metals | O.C. | Heavy metals |
| | N-F-codoped TiO2 + visible light | Benzoic acid (BA) | Cr(VI) | Around 98% | 100% | Oxidation | Reduction | 90 min | 180 min | [38] | | EDAS/(TiO2-Au) nps + radiations | Methylene blue (MB) | Cr(VI) | — | — | Oxidation | Reduction | — | — | [106] | | Metal-deposited Degussa (P25 TiO2) nps + radiations | Methylene blue (MB) | Cr(VI) | — | — | Reduction | Reduction | — | — | [107] | | UV/TiO2 | Di-n-butyl phthalate (DBP) | Cr(VI) | — | — | — | Reduction | — | — | [65] | | UV/TiO2 | Salicylic acid | Cr(VI) | — | — | Oxidation | Reduction | — | — | [108] | | Polymer-sensitized TiO2 + irradiations | Phenol | Cr(VI) | — | — | Oxidation | Reduction | — | — | [20] | | UV-induced TiO2 | Acid orange 20 (AO20) | Cr(VI) | 100% | 100% | Reduction | Reduction | 120 min | 120 min | [110] | | UV/TiO2 | Acid orange 7 (AO7) | Cr(VI) | 100% | 100% | Reduction | Reduction | | | [111] | | Gold nanotubes embedded in pores of TiO2 nanotubes + radiations | Acid orange 7 (AO7) | Cr(VI) | — | — | Oxidation | Reduction | — | — | [112] |
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