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Exploration of an efficient method for removing antibiotics from water and digested sewage sludge using Fe(VI): Kinetics and P phytoavailability and compostability in treated sludge

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Chemosphere 2023年第1期336卷 139165页

作者： Limmun, Warunee Ishikawa, Nao Maeda, Takeki Umeda, Takayuki Song, Jie Sasamoto, Makoto Umita, Teruyuki Ito, Ayumi Department of Frontier Matters and Function Engineering Graduate School of Engineering Iwate University Ueda 4-3-5 Morioka020-8551 Japan Department of Engineering King Mongkut's Institute of Technology Ladkrabang Prince of Chumphon Campus 17/1 Chumko Pathio Chumphon 86160 Thailand Course of Civil and Environmental Engineering Department of System Innovation Engineering Faculty of Science and Engineering Iwate University Ueda 4-3-5 Morioka020-8551 Japan Department of Food Production and Environmental Management Faculty of Agriculture Iwate University Ueda 3-18-34 Morioka020-8550 Japan Technical Office Faculty of Science and Engineering Iwate University Ueda 4-3-5 Morioka020-8551 Japan

Potassium ferrate (K2FeO4) containing hexavalent iron [Fe(VI)] is an environmentally friendly oxidant, which possesses strong oxidizing power to treat wastewater and sludge. Therefore, the present study investigated degradation of selected antibiotics, namely levofloxacin (LEV), ciprofloxacin (CIP), oxytetracycline (OTC), and azithromycin (AZI), in water and anaerobically digested sewage sludge samples using Fe(VI). The effects of different Fe(VI) concentrations and initial pH values on antibiotic removal efficiency were evaluated. Under the studied conditions, LEV and CIP were almost completely removed from water samples, following second-order kinetics. In addition, over 60% of the four selected antibiotics were removed from sludge samples using 1 g L−1 Fe(VI). Furthermore, P phytoavailability and compostability of Fe(VI)-treated sludge were evaluated using different extraction reagents and a small composting unit. The extraction efficiency of phytoavailable P using 2% citric acid and neutral ammonium citrate was approximately 40% and 70%, respectively. The mixture of Fe(VI)-treated sludge and rice husk was self-heated in a closed composting reactor through the biodegradation of organic matter derived from the treated sludge. Therefore, Fe(VI)-treated sludge may be used as an organic material containing phytoavailable P for compost. © 2023 Elsevier Ltd

关键词： Antibiotics

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Exploration of an Efficient Method for Removing Antibiotics from Water and Digested Sewage Sludge Using Fe(Vi): Kinetics and P Phytoavailability and Compostability in Treated Sludge

SSRN

引用

SSRN 2023年

作者： Limmun, Warunee Ishikawa, Nao Maeda, Takeki Umeda, Takayuki Song, Jie Sasamoto, Makoto Umita, Teruyuki Ito, Ayumi Department of Frontier Matters and Function Engineering Graduate School of Engineering Iwate University Morioka020-8551 Japan Department of Engineering King Mongkut's Institute of Technology Ladkrabang Prince of Chumphon Campus 17/1 Chumko Pathio Chumphon86160 Thailand Course of Civil and Environmental Engineering Department of System Innovation Engineering Faculty of Science and Engineering Iwate University Morioka020-8551 Japan Department of Food Production and Environmental Management Faculty of Agriculture Iwate University 3-18-34 Ueda Morioka020-8550 Japan Technical Office Faculty of Science and Engineering Iwate University Morioka020-8551 Japan

Potassium ferrate (K2FeO4) containing hexavalent iron [Fe(VI)] is an environmentally friendly oxidant, which possesses strong oxidizing power to treat wastewater and sludge. Therefore, the present study investigated degradation of selected antibiotics, namely levofloxacin (LEV), ciprofloxacin (CIP), oxytetracycline (OTC), and azithromycin (AZI), in water and anaerobically digested sewage sludge samples using Fe(VI). The effects of different Fe(VI) concentrations and initial pH values on antibiotic removal efficiency were evaluated. Under the studied conditions, LEV and CIP were almost completely removed from water samples, following second-order kinetics. In addition, over 60% of the four selected antibiotics were removed from sludge samples using 1 g·L-1 Fe(VI). Furthermore, P phytoavailability and compostability of Fe(VI)-treated sludge were evaluated using different extraction reagents and a small composting unit. The extraction efficiency of phytoavailable P using 2% citric acid and neutral ammonium citrate was approximately 40% and 70%, respectively. The mixture of Fe(VI)-treated sludge and rice husk was self-heated in a closed composting reactor through the biodegradation of organic matter derived from the treated sludge. Therefore, Fe(VI)-treated sludge may be utilized as an organic material containing phytoavailable P for compost. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

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