Removal of nonylphenol and nonylphenol monoethoxylate from water and anaerobically digested sewage sludge by Ferrate(VI)
| Autor: | Makoto Sasamoto, Ayumi Ito, Yu Majima, Jin Momotori, Warunee Limmun, Teruyuki Umita, Nao Ishikawa, Yumi Kawamura |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Potassium ferrate Potassium Compounds Health Toxicology and Mutagenesis Iron 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Wastewater 01 natural sciences Waste Disposal Fluid Matrix (chemical analysis) chemistry.chemical_compound Phenols Oxidizing agent Environmental Chemistry Organic matter Anaerobiosis 0105 earth and related environmental sciences chemistry.chemical_classification Sewage Public Health Environmental and Occupational Health General Medicine General Chemistry Hydrogen-Ion Concentration Pollution 020801 environmental engineering Nonylphenol chemistry Environmental chemistry Sewage treatment Ferrate(VI) Sludge Iron Compounds Water Pollutants Chemical |
| Zdroj: | Chemosphere. 236 |
| ISSN: | 1879-1298 |
| Popis: | Nonylphenol (NP) and nonylphenol monoethoxylate (NP1EO) have toxic and persistent characteristics, and are incompletely degraded in conventional wastewater treatment processes. These compounds are present in sewage sludge that can be reused as fertilizers or soil conditioners. Accordingly, NP and NP1EO should be properly removed before being discharged in the environment. In this study, potassium ferrate (K2FeO4) containing hexavalent iron (Fe(VI)) was used as an environment-friendly oxidizing agent to mediate NP and NP1EO degradation. The aim of this study was to investigate the effects of pH and Fe(VI) dosage on the degradation of NP and NP1EO in water and anaerobically digested sewage sludge samples. In water samples, under conditions examined in this study, maximum removal efficiencies for NP and NP1EO were 98% and 92%, respectively. For digested sewage sludge samples, the maximum removal efficiencies of NP and NP1EO were 58% and 96%, respectively. The results demonstrated that Fe(VI) can potentially degrade NP and NP1EO in water and digested sewage sludge samples. However, organic matter as a matrix in the sludge sample would inhibit the degradation of NP and NP1EO by Fe(VI). The pH values before and after adding K2FeO4 to the samples had an obvious influence on the removal of NP and NP1EO. |
| Databáze: | OpenAIRE |
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