Title :
Adsorption of Brilliant Scarlet 3R by Natural Diatomite
Author :
He, Shaohua ; Gu, Zhipan ; Liu, Jing ; Xie, Shuibo
Author_Institution :
Sch. of Urban Constr., Univ. of South China Hengyang, Hengyang, China
Abstract :
The adsorption of acid dyes by diatomite was investigated using Brilliant Scarlet 3R (NSK). Adsorption of this textile dyes onto diatomite earth sample was studied by batch adsorption techniques at varying temperatures 298 K, 309 K, 318 K, 328 K. The adsorption behavior of textile dye on diatomite samples was investigated using a UV-vis spectrophotometric technique. The adsorption processes follow the pseudo second-order model, and adsorption coverage over the surface of diatomite was studied using two well-known isotherm models: Langmuir´s and Freundlich´s. These results suggest that the dye adsorption isotherms fit well to Freundlich and Langmuir equation. The Freundlich equation 1/n between 0.3636 and 0.879 indicates favorable adsorption. The main driving forces of adsorption are electrostatic attraction and van der waals force. These results show that natural diatomite holds great potential to remove textile dyes from wastewater.
Keywords :
adsorption; chemical engineering; dyes; electrostatics; van der Waals forces; UV-vis spectrophotometric technique; acid dyes; adsorption behavior; adsorption processes; brilliant scarlet 3R; electrostatic attraction; natural diatomite; pseudo second-order model; temperature 298 K; temperature 309 K; temperature 318 K; temperature 328 K; textile dyes; van der waals force; Chemicals; Civil engineering; Earth; Equations; Kinetic theory; Pollution; Temperature; Testing; Textiles; Thermal conductivity; adsorption isotherm; adsorption kinetic; brilliant scarlet 3R; natural diatomite;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.335
