Effect of pH on solar photocatalytic reduction and deposition of Cu(II), Ni(II), Pb(II) and Zn(II): Speciation modeling and reaction kinetics
| Autor: | R.L. Sawhney, Rubina Chaudhary, Kavita Kabra |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Environmental Engineering
Light Photochemistry Health Toxicology and Mutagenesis Metal ions in aqueous solution media_common.quotation_subject Inorganic chemistry Catalysis Water Purification Metal Chemical kinetics Adsorption Nickel Environmental Chemistry Irradiation Waste Management and Disposal media_common Ions Chemistry Hydrogen-Ion Concentration Pollution Kinetics Zinc Speciation Lead Metals visual_art Sunlight Photocatalysis visual_art.visual_art_medium Thermodynamics Deposition (chemistry) Copper |
| Zdroj: | Journal of Hazardous Materials. 149:680-685 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2007.04.028 |
| Popis: | The present study is targeted on the effect of pH on solar photocatalytic removal of metal ions from wastewater. Photoreductive deposition and dark adsorption of metal ions Cu(II), Ni(II), Pb(II) and Zn(II), using solar energy irradiated TiO 2 , has been investigated at pH values 2, 4, 7, 8 and 10. Modeling of metal species at the studied pH values has been performed and speciation is used as a tool for discussing the photodeposition. The decreasing order of metal deposition at pH 2 and 4 was found to be Pb(II) > Cu(II) > Ni(II) ≅ Zn(II). In the neutral and alkaline pH conditions (pH 7, 8 and 10) the order was Cu(II) > Zn(II) > Ni(II) > Pb(II). |
| Databáze: | OpenAIRE |
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