Microorganisms: A remedial source for dye pollution

Controlled Removal of Organic Dyes from Aqueous Systems Using Porous Cross-Linked Conjugated Polyanilines

“…At lower pH values (2), the protonations of both sulfonate and amine groups of the dye and network, respectively, cause less attraction resulting in disruption of absorption (72% adsorbed after 1400 min). At higher pH values (12), the dye is fully deprotonated, hence loses the ability to hydrogen bond with the extended network, and therefore is not adsorbed efficiently (61% only after 1400 min). The theorized interactions of EO and the polyanaline-like networks are represented in Figure S16.…”

“…UV–vis solid-state analysis of the networks revealed absorbances at 342 and 660 nm, characteristic of the π–π* transition of benzenoid and quinoid rings, respectively ( Figure S3 ). 12 Interestingly, it was observed that the relative intensity of the quinoid-based transition, with respect to the benzenoid, decreased as the linker length increased. Thermal analysis of the networks PTPA and PTPA-3 - 50 revealed degradation temperatures in the range of 232–270 °C ( Table S2 and Figure S4 ); no direct correlation between degradation temperature and linker length was observed, although a significant increase in thermal stability with respect to PAni (193 °C) was observed.…”

“…Lower levels of oxygen and light inhibit the ability of aquatic plants and algae to photosynthesize, which in turn disrupts the aquatic ecosystem and biodiversity. In terms of damage to human health, it has been reported that dyes are carcinogenic and mutagenic as well as are irritants, causing contact dermatitis. − It is therefore imperative to remove dyes from water supplies at source.…”

A novel covalent triazine-based frameworks as photocatalysts for the degradation of dyes under visible light irradiation

“…Traditional treatment methods, such as centrifugation or sedimentation, occulation, biological treatment, have some drawbacks, including a low removal rate, complex equipment, and secondary pollution. [3][4][5] In recent years, photocatalytic degradation technology has drawn extensive attention for its efficient treatment of organic components in industrial wastewater. [6][7][8] Therefore, synthesizing suitable photocatalysts to satisfy the practical need is a challenge that this green method cannot circumvent, especially for photocatalysts that can directly use inexhaustible solar energy.…”

“…Traditional treatment methods, such as centrifugation or sedimentation, flocculation, biological treatment, have some drawbacks, including a low removal rate, complex equipment, and secondary pollution. 3–5…”