Removal of typical aromatic amines from water during one-stage process using Spectrofluorimetry with Bentonite

Removal of typical contaminants like aromatic amines (e.g. 1-naphthalen amine, diphenyl amine, aniline, 2 and 6-dimethyl pyridine) from water during one-stage process is a method to purify water wherein organic contaminants get extracted from water by bentonite. In this study the effects of pH, stirring time, stirring speed, bentonite mass and bentonite size (mesh) were investigated. Also, the experimental isotherm data were examined using Temkin, Freundlich, Langmuir and Debian- Radushkevich isotherm equations. Adsorption of aromatic amines on bentonite was better correlated by Temkin adsorption isotherm. 2 and 6-diphenyl amine, aniline, diphenyl amine and 1- naphthalen amine were extracted by 12/93%, 23/91%, 45/81% and 60/42%, respectively. Study of kinetic adsorption data showed that the adsorption reaction of these compounds from aqueous mediums onto bentonite was best fitted on the first order virtual equation. The results showed that this technique is an effective and simple process to extract common aromatic amines from water. The proposed technology makes the use of bentonite possible as an adsorbent for water treatment in industrial scale.