Non-enzymatic reduction of Cr (VI) and it's effective biosorption using heat-inactivated biomass: A fermentation waste material
| Autor: | Ayyadurai Niraikulam, George Sebastian Antony, Abhijit Manna, Puhazhselvan Puhazhendi, Kamini Numbi Ramudu, Aparna Ramchary, Sujiritha Baskaran |
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| Rok vydání: | 2019 |
| Předmět: |
Chromium
Environmental Engineering Hot Temperature Health Toxicology and Mutagenesis 0211 other engineering and technologies Biomass chemistry.chemical_element Industrial Waste 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification Polyporaceae symbols.namesake Adsorption Physisorption Environmental Chemistry Recycling Waste Management and Disposal Effluent 0105 earth and related environmental sciences Waste Products 021110 strategic defence & security studies Chemistry Biosorption Langmuir adsorption model Tanning Pollution Chemisorption Fermentation symbols Thermodynamics Oxidation-Reduction Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Journal of hazardous materials. 392 |
| ISSN: | 1873-3336 |
| Popis: | The effectiveness of heat-inactivated fungal biomass a fermentation waste of newly isolated laccase enzyme producer Leiotrametes flavida was studied for Cr (VI) removal in water and applied for Cr (VI) removal from tannery effluent. Adsorption parameters pH, biomass concentration and contact time were optimized using Box-Behnken design of response surface methodology. The adsorption process fits the Langmuir isotherm. Thermodynamic and kinetic studies showed that the process is spontaneous at ambient temperature and followed the second-order kinetics model, respectively. The values of the kinetic model indicated that the adsorption process is a combination of physisorption and chemisorption. Chromium adsorption onto the biomass was confirmed by SEM-EDAX, FTIR, XPS and XRD analysis. XPS analysis confirmed the reduction of Cr (VI) to Cr (III). The amount of chromium adsorbed was 72.38 % and 68.33 % for water and effluent, respectively. Chromium adsorbed onto biomass was desorbed at pH 9 with 1 M NaOH. Total chromium desorbed was 61.40 and 59.38 percent from water and effluent, respectively. The amount of Cr (III) in the desorbed sample was 71 and 68 percent, respectively. The heat-inactivated biomass of Leiotrametes flavida is a suitable material for efficient Cr (VI) removal and detoxification. |
| Databáze: | OpenAIRE |
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