Conductive polymer layered semiconductor for degradation of triclopyr acid and 2,4-dichlorophenoxyacetic acid from aqueous stream using coalesce adsorption-photocatalysis technique
| Autor: | Pareshkumar G. Moradeeya, Madhava Anil Kumar, Archana Sharma, Shaik Basha |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Titanium
Environmental Engineering Aniline Compounds Herbicides Polymers Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Water General Medicine General Chemistry Hydrogen-Ion Concentration Pollution Glycolates Kinetics Semiconductors Environmental Chemistry Adsorption 2 4-Dichlorophenoxyacetic Acid Water Pollutants Chemical |
| Zdroj: | Chemosphere. 298 |
| ISSN: | 1879-1298 |
| Popis: | Polyaniline supported titanium dioxide nanoparticles (PTs) were fabricated using chemical oxidative aniline polymerization in the presence of titanium dioxide with ammonium peroxydisulfate as an oxidant. The synthesized PTs were thoroughly characterized for their morphological and functional features. PTs were employed for the photodegradation of acidic herbicides; 2,4-dichlorophenoxyacetic acid (2,4-D) and triclopyr acid (TCP). PT's surface modifications were imparted and their herbicide removal efficiencies were compared. The best operating conditions for adsorption/photocatalysis were 0.5 g/L photocatalyst, 10 mg/L concentration of individual herbicides resulted in 90.72% removal of TCP at pH 4 and 99.91% removal of 2,4-D at pH 5. Adsorption kinetics of herbicides, onto PT-1 showed the equilibrium attainment within 30 min and experimental data obeyed pseudo-second order model for TCP and 2,4-D removal which was governed by chemisorption. Analysis of TCP and 2,4-D adsorption indicated that the removal followed Sips model for TCP removal while Redlich-Peterson model explained the removal of 2,4-D by PT-1. Rate constants indicated that the amount of TiO |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect