Tuning down the environmental interests of organoclays for emerging pollutants: Pharmaceuticals in presence of electrolytes.
Tuning down the environmental interests of organoclays for emerging pollutants: Pharmaceuticals in presence of electrolytes.
Chemosphere. 2020 Jan;239:124730
Authors: Guégan R, De Oliveira T, Le Gleuher J, Sugahara Y
Abstract
The impact of electrolytes on the adsorption of emerging pollutants: pharmaceuticals onto layered materials: a raw clay mineral and its nonionic and cationic organoclay derivatives was studied. The selected pharmaceuticals: amoxicillin, norfloxacin, sulfamethoxazole, metoprolol, carbamazepine, and trimethoprim show different electric charges: zwitterionic, anionic, cationic and neutral and hydrophobic character (different LogP). Without any salts, the set of complementary data obtained by UV and infrared spectroscopies, X-ray diffraction points out the importance of the electric charge which represents a key parameter in both the spontaneity and feasibility of the adsorption. In contrast, the hydrophobicity of the analytes plays a minor role but determines the magnitude of the adsorbed amount of pharmaceuticals onto organoclays. With a dual hydrophilic and hydrophobic behavior, nonionic organoclay appears to be the most polyvalent material for the removal of the pharmaceuticals. In the presence of electrolytes (NaCl at a concentration of 1 × 10-2 mol L-1), both nonionic and cationic organoclays show a decrease of their efficiencies, whereas the adsorption is particularly enhanced for Na-Mt except for t...
Source: Chemosphere - Category: Chemistry Authors: Guégan R, De Oliveira T, Le Gleuher J, Sugahara Y Tags: Chemosphere Source Type: research
More News: Amoxicillin | Bactrim | Carbamazepine | Chemistry | Environmental Health | Sulfamethoxazole | Toprol | Trimethoprim