Thermodynamic and Kinetic Study of the Eosin Dye Removal from Aqueous Solution by ZnO Nanoparticles

Removal of methyl orange dye using(ZnO/MWCNTs) nanomaterial

“…The infrared spectrum is shown in Figure (3) The infrared spectrum shown in Figure (5), which is due to the (ZnO/MWCNTs), shows absorption bands at 1 2916.5 cm-1 (3470.82) cm and (417.2) cm-1 due to the basic bands of the zinc oxide [16], either The absorption bands that appear at (1528.6) cm-1 and (1135.4) cm-1 belong to the (C=C) and (C-H) groups of carbon nano tubes [17], while the absorption band cn1(3518.2)cm-1 appears at a higher frequency for the same group for each of the two components of the complex, which belongs to the hydroxyl group is attached to zinc oxide (ZnO) and the second band at (3470.82)cm-1 appears in the region of high frequencies that belong to the (OH) group linked to the surfaces of multi-walled carbon nanotubes. The displacement of these frequencies to higher values is due to the interference between those effective groups.…”

“…The waste water of industrial activities contains a variety of potentially toxic and environmentally harmful compounds [2]. The most dyes are stable to light and oxidizing agents in nature [3] Pesticides, phenols, amines, and aromatic amines are the most frequent organic pollutants that contribute to environmental pollution [ 4]. The most common adsorbents utilized to remove pollutants include carbon, zeolites and polymers, bulk, siliceous materials, agricultural waste, and industrial waste [5] [6].…”

Removal Orange G Dye From Aqueous Solutions Using Graphene Oxide/Magnesium Oxide Nano Composite

“…The dye adsorption by batch process to study different parameter such as contact time (25-125) min ,dose of adsorbate (GO/MgO NCs ) (0.01-0.05g), pH (3-10),concentration of dye (5-30) ppm temperature (20-40°C).The samples were shaken and kept in a thermostat for (125min) ,the samples were then filtered in a centrifuge for 15 min (at 3500 rpm) and then filtered again and analyzed spectrophotometric ally. The percentage dye adsorption from the aqueous solution was determined according to the following equation (% Adsorption) 18 : ₒ e (both mg/L), are the initial concentration and the concentration at any time respectively. The adsorption capacity Q e (mg/g).…”