Effect of operational factors on bioregeneration of binary phenol and 4-chlorophenol-loaded granular activated carbon using PVA-immobilized biomass cryogels
| Autor: | Si Ling Ng, Poh-Eng Lim, Chye-Eng Seng, Rohana Adnan, Kwok-Yii Leong |
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| Rok vydání: | 2016 |
| Předmět: |
Granular activated carbon
Health Toxicology and Mutagenesis 0208 environmental biotechnology Biomass 02 engineering and technology 010501 environmental sciences 01 natural sciences Concentration ratio chemistry.chemical_compound Adsorption medicine Environmental Chemistry Phenol 0105 earth and related environmental sciences Chromatography General Medicine Biodegradation Pollution 020801 environmental engineering Biodegradation Environmental chemistry Chemical engineering Charcoal 4-chlorophenol Cryogels Activated carbon medicine.drug Chlorophenols |
| Zdroj: | Environmental science and pollution research international. 24(26) |
| ISSN: | 1614-7499 |
| Popis: | The effects of dry biomass density in cryogel beads, shaking speed and initial concentration ratio of phenol to 4-chlorophenol (4-CP) on the bioregeneration efficiencies of binary phenol and 4-CP-loaded granular activated carbon (GAC) for phenol and 4-CP, respectively, were investigated under the simultaneous adsorption and biodegradation approach. The results revealed higher bioregeneration efficiencies of binary-loaded GAC for phenol and 4-CP at higher dry biomass density but moderate shaking speed. The optimum dry biomass density in cryogel beads and shaking speed for use in bioregeneration were found to be 0.01 g/mL and 250 rpm, respectively. With respect to the initial phenol to 4-CP concentration ratio, the bioregeneration efficiencies were lower under increasing phenol and 4-CP initial concentrations, respectively, with the effect being more conspicuous under increasing 4-CP concentration. Higher bioregeneration efficiencies were achieved with the use of immobilized rather than suspended biomasses. |
| Databáze: | OpenAIRE |
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