Removal of Basic Red 46 dye from aqueous solution by adsorption and photocatalysis: equilibrium, isotherms, kinetics, and thermodynamic studies

Biochars derived from bamboo and rice straw for sorption of basic red dyes

“…all biochars at different temperatures. Previous studies also showed better fittings of the Langmuir equations than the Freundlich equations to isotherm data of BR46 sorption onto adsorbents [64,65]. In this study, the values of q max increased with the increase of temperature, which implied that the adsorption easily occurs at high temperatures.…”

Pb2+ adsorption on TiO2@HF‐waste building bricks: Kinetics, thermodynamics, and mechanisms

“…Adsorption kinetics is to explore the relationship between adsorption rate and adsorption time (Araga, Kali, & Sharma, 2019;Azizian, 2004;Elhadj et al, 2019;Gao et al, 2019;Maranescua, Lupaa, & Visa, 2019;Yu, Xu, & Ye, 2018). The pseudo-first-order kinetic and pseudo-second-order kinetic model can be expressed by the following Equations 2 and 3 (Aroua, Leong, Teo, Yin, & Daud, 2008;Aroua, Yin, Lim, Kan, & Daud, 2009).…”

Enhanced photocatalytic hydrogen evolution by novel Nb-doped SnO2/V2O5 heteronanostructures under visible light with simultaneous basic red 46 dye degradation

“…Semiconductor-based photocatalysis, as a green technology, allows the removal of harmful organic contaminations from textile industries and hydrogen production by a sustainable solar energy source, thereby providing an attractive route to solve both problems [1][2][3]. Basic Red 46 (BR46) dye has been identified as one of the most problematic azo dyes used in textile industries, which can potentially threaten living organisms [4]. Therefore, their removal from aqueous effluents is one of the most important environmental issues.…”

“…Therefore, their removal from aqueous effluents is one of the most important environmental issues. Up to now, various semiconductors such as TiO 2 [5], SnO 2 [6], ZnO [4], SrTiO 3 [7], Fe 2 O 3 [8] and CdS [9] have been extensively studied for photocatalytic degradation of environmental pollutants. Among them, SnO 2 has been widely researched as a suitable photocatalyst, in terms of its low cost, nontoxicity, high chemical stability and high optical transparency in the visible range with low electrical resistance [10].…”

“…V vs. NHE[42], thus electrons can be reacted with O 2 and H + to generate H 2 O 2 that indirectly produce • OH. Concomitantly, the photogenerated holes with strong oxidizing power can be captured by the absorbed H 2 O molecules to generate reactive • OH radicals, resulting in a prolonged lifetime of carriers[4]. The • O 2 − and • OH radicals are known to be the most active species to attack the BR46 molecules absorbed on the surface of heteronanostructure and then decompose into degradable products such as H 2 O and CO 2 .…”