Advancements in textile dye removal: a critical review of layered double hydroxides and clay minerals as efficient adsorbents.

The textile industry is responsible for producing large volumes of wastewater that contain a wide variety of dye compounds. This poses a significant environmental hazard and risks harming both ecosystems and living organisms. This review study explores the advancements in adsorption research for dye removal, with a particular emphasis on the development of various adsorbents.

Benzothiazole appended 2,2'-(1,4-phenylene)diacetonitrile for the colorimetric and fluorescence detection of cyanide ions.

A benzothiazole appended 2,2'-(1,4-phenylene)diacetonitrile derivative (2,2')-2,2'-(1,4-phenylene)bis(3-(3-(benzo[]thiazol-2-yl)-4-hydroxyphenyl)acrylonitrile) (PDBT) has been synthesized and investigated as a novel sensor, capable of showing high selectivity and sensitivity towards CN over a wide range of other interfering anions. After reaction with CN, PDBT shows a new absorption peak at 451 nm with a color transformation from colorless to reddish-brown. When yellow fluorescent PDBT is exposed to CN, it displays a significant increase in fluorescence at 445 nm, resulting in strong sky-blue fluorescence emission.

Zinc ion detection using a benzothiazole-based highly selective fluorescence "turn-on" chemosensor and its real-time application.

A new photochromic fluorescence chemosensor was devised and effectively synthesized using benzothiazole and imidazopyridine derivatives. A "turn-on" fluorescence sensor BIPP for Zn detection was developed and has a quick response, excellent sensitivity, and remarkable selectivity over other metal ions. When Zn was added to the BIPP solution, a new strong fluorescence emission peak at 542 nm formed with a considerable increase in intensity.

Removal of bisphenol A and methylene blue through persulfate activation by calcinated α-MnO nanorods: effect of ultrasonic assistance and toxicity assessment.

This work investigates the efficacy of α-MnO nanorods for persulfate-mediated degradation of bisphenol A (BPA) and methylene blue (MB), in silent and ultrasonic-assisted systems. The conversion of α-MnO nanoparticle flakes to nanorods occurs upon calcination at a temperature of 400 °C for 3 h under the ramping conditions. The comparative characterization of nanomaterials pre- and post-calcination reveals better physical, chemical, and thermal properties of α-MnO nanorods.

Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore.

Herein, the turn-off fluorescence sensor of 2-((4'-(7,8,13,14-tetrahydrodibenzo[,]phenanthridin-5-yl)-[1,1'-biphenyl]-4-yl)methylene)malanonitrile (7) was developed for the recognition of CN ions and studied using different spectroscopic techniques. The selective recognition of CN ions by 7 was investigated UV-vis spectroscopy and fluorescence studies in acetonitrile solvent, which exhibited an obvious color change from orange to colorless under 365 UV light. The sensor compound 7 possesses a high binding constant ( ) for CN ions in the order of 5.

Application of protein-functionalised aluminium nanosheets synthesised from sewage sludge for dye removal in a fixed-bed column: Investigation on design parameters and kinetic models.

Protein-functionalised aluminium nanosheets (PRS-AlNs) were packed in a continuous fixed-bed column to remove crystal violet (CV) and Congo red (CR) dyes. A group of characterisation techniques, like SEM, TEM, AFM, XRD, BET, DSC and Raman spectroscopy, was performed for PRS-AlNs. The influence of several factors like bed depth (1, 2 and 3 cm), inlet dye concentration (50, 100 and 150 mg/L) and inlet flow rate (1.

(Tetrahydrodibenzo[,]phenanthridin-5-yl)phenol as a Fluorescent Probe for the Detection of Aniline.

Two (tetrahydrodibenzo[,]phenanthridin-5-yl)phenols that differ in their substituents at the para position (, R = H and , R = NEt) were designed and synthesized. The presence of a -NEt group in probe facilitates the twisted intramolecular charge transfer (TICT) process, making emissive, which distinctly coordinated with boron trifluoride in the presence of different amines with different electronic properties. A substantial increase in emission intensity with increasing viscosity of the surrounding environment and smooth formation of a planar complex with boron and Zn ions concluded the presence of a TICT process.

Correction to: Facile synthesis of carbon-coated layered double hydroxide and its comparative characterisation with Zn-Al LDH: application on crystal violet and malachite green dye adsorption-isotherm, kinetics and Box-Behnken design.

The original publication of this paper contains an error. The correct Figure 8 is shown in this paper.

Facile synthesis of carbon-coated layered double hydroxide and its comparative characterisation with Zn-Al LDH: application on crystal violet and malachite green dye adsorption-isotherm, kinetics and Box-Behnken design.

The adsorption of crystal violet (CV) and malachite green (MG) dyes using carbon-coated Zn-Al-layered double hydroxide (C-Zn-Al LDH) was investigated in this work. The characterisation of both Zn-Al LDH and C-Zn-Al LDH was performed using XRD, SEM, TEM, EDX, XPS, FTIR, BET and TGA. The results indicated that carbon particles were effectively coated on Zn-Al LDH surface.