Journal of hazardous materials, 2017-05, Vol.330, p.1-8
2017
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Details
- Autor(en) / Beteiligte
- Titel
- Mechanisms of Cd and Cr removal and tolerance by macrofungus Pleurotus ostreatus HAU-2
- Ist Teil von
- Journal of hazardous materials, 2017-05, Vol.330, p.1-8
- Ort / Verlag
- Netherlands: Elsevier B.V
- Erscheinungsjahr
- 2017
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- •Cd and Cr induced active oxygen and malonaldehyde in hypha.•Antioxidant, such as SOD, POD and CAT, played an important role in removing active oxygen.•Glutathione worked in Cd accumulation and detoxifcation.•Fungus removed Cd and Cr in liquid culture through absorption and adsorption.•Fungus bioaccumulated the Cd and Cr in soil. Fungi bioaccumulation is a novel and highly promising approach to remediate polluted soil. The present study revealed a high ability to tolerate Cd and Cr in the fungus Pleurotus ostreatus HAU-2. However, high concentrations of Cd and Cr can suppress fungal growth and result in a variation of hypha micromorphology. Batch experiments were performed to investigate Cd and Cr stress effects on the amount of active oxygen in fungi, activity of antioxidant enzyme, as well as the removal efficiency of Cd and Cr. The results revealed that Cd and Cr caused increasing active oxygen and malonaldehyde (MDA) concentrations. Antioxidant enzymes play a central role in removing active oxygen, while glutathione (GSH) aids the Cd detoxification within cells. In fluid culture, fungal removal rates of Cd and Cr ranged from 44.85% to 80.36% and 14.49% to 45.55%, respectively. Intracellular accumulation and extracellular adsorption were the major removal approaches. Bag cultivation testing indicated that the fungus absorbed Cd and Cr contained within soil. In particular, the accumulation ability of Cd (15.6mgkg−1) was higher compared to that of Cr (8.9mgkg−1). These results successfully establish P. ostreatus HAU-2 as promising candidate for the remediation of heavy-metal polluted soils.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0304-3894eISSN: 1873-3336DOI: 10.1016/j.jhazmat.2017.01.047Titel-ID: cdi_proquest_miscellaneous_1869968876
- Format
- –
- Schlagworte
- Acclimatization, Accumulation, Adsorption, Biodegradation, Environmental, Cadmium - isolation & purification, Cadmium - metabolism, Cadmium - toxicity, Catalase - metabolism, Chromium - isolation & purification, Chromium - metabolism, Chromium - toxicity, Glutathione - metabolism, Heavy metals, Hydrogen Peroxide - metabolism, Hyphae - drug effects, Hyphae - enzymology, Hyphae - growth & development, Macrofungus, Malondialdehyde - metabolism, Peroxidase - metabolism, Pleurotus - drug effects, Pleurotus - growth & development, Pleurotus - metabolism, Remediation, Soil Pollutants - isolation & purification, Soil Pollutants - metabolism, Superoxide Dismutase - metabolism