Rapid scavenging of methylene blue dye from a liquid phase by adsorption on alumina nanoparticles

Abstract

The adsorption behavior of methylene blue on as-synthesized alumina nanoparticles has been investigated.

Grape-like mesostructured silica nanoparticle-decorated single-walled carbon nanotubes: silica growth and dye adsorptivity

“…Among the four isotherms tested, the Langmuir and R-P models were revealed to be the best models to describe the adsorption process, showing by the highest accuracy in terms of correlation coefficient (R 2 ). The good fitting observed with the Langmuir model suggests that the process follows a monolayer adsorption, in which there is no transmigration of the adsorbate on the surface plane 34 . A similar phenomenon has been observed in the adsorption of cationic dyes onto mesostructured silica materials 4 .…”

Kinetic and equilibrium modeling for removal of nitrate from aqueous solutions and drinking water by a potential adsorbent, hydrous bismuth oxide

“…48 At low nitrate concentration diffusion rate is lower due to low concentration gradient as rate scales with the concentration gradient but with the increase of nitrate concentration, the concentration gradient experiences change and to maintain balance between the adsorbate present on the solid surface and near boundary layer of adsorbent, it nally results in increase in diffusion rate.…”

Preparation of activated carbon from Alligator weed ( Alternenthera philoxeroids ) and its application for tartrazine removal: Isotherm, kinetics and spectroscopic analysis

“…More importantly, it imparts no side effect or toxicity to the 37 water and this account for the superior removal of organic 38 contaminants as compared to conventional treatments [16]. 39 Therefore, it is preferred over other techniques in terms of cost, 40 ease of operation, flexibility, negligible disturbances with diurnal 41 variations, reusability and recyclability of the sorbent [17]. Several Alligator weed (Alternenthera philoxeroids) is a native of South 48 America and now it is widespread has around the world [26] due to 49 its extremely vigorous growth and resistance to control measures.…”

“…Due to their complex aromatic structure and 15 molecular size, dyes are resistant to photo-catalytic, thermal and 16 biological degradation. Colored effluents are highly visible even in 17 small concentration and seriously affect the aesthetic quality and 18 transparency of water bodies, damaging the aquatic ecosystem [3]. 19 Thin layer of discharged dyes, formed over the surfaces of recipient 20 water bodies also reduces the amount of dissolved oxygen, thereby 21 affecting the aquatic fauna [4,5].…”