Performance of biochar-based filtration bed for the removal of Cr(VI) from pre-treated synthetic tannery wastewater
| Autor: | Prem Prakash, Brijesh Kumar Mishra, Arukula Deepa |
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| Rok vydání: | 2019 |
| Předmět: |
Chromium
0208 environmental biotechnology 02 engineering and technology Wastewater 010501 environmental sciences 01 natural sciences law.invention chemistry.chemical_compound law Spectroscopy Fourier Transform Infrared Biochar Environmental Chemistry Coagulation (water treatment) Hexavalent chromium Waste Management and Disposal Filtration 0105 earth and related environmental sciences Water Science and Technology Chemistry General Medicine Pulp and paper industry 020801 environmental engineering Aluminium formate Charcoal Adsorption Water Pollutants Chemical |
| Zdroj: | Environmental Technology. 42:257-269 |
| ISSN: | 1479-487X 0959-3330 |
| DOI: | 10.1080/09593330.2019.1626912 |
| Popis: | In the present study, the performance of biochar-based filtration bed was assessed to enhance the removal efficiency of Cr(VI), from the pre-treated synthetic tannery wastewater. The pre-treatment of wastewater was carried out with aluminium formate (AF) as a coagulant and 80% Cr(VI) removal was observed which might be due to the formation of carboxylic complexation reaction. The purity of coagulant and the sludge components were validated with XRD analysis and the results revealed the formation of pure aluminium formate compound as well as a clear change in the crystalline structure in the treated sludge. FT-IR spectra demonstrated the carboxylic compound participated in the removal of Cr(VI) during the coagulation process. The pre-treated wastewater having 20 mg/L (residual) Cr(VI) was passed through a three-layered filtration bed containing biochar, which showed complete removal of Cr(VI) ∼ 99.99% by precipitating into bind form under the influence of CaCO |
| Databáze: | OpenAIRE |
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