Adsorption and degradation of 14C-bisphenol A in a soil trench
| Autor: | Sui Yanming, Xinze Wang, Shen Jian, Zhang Zhenyu, Xinnan Tong, Zhen Zhang, Feng Jimeng, Hai-lu Wu |
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| Rok vydání: | 2017 |
| Předmět: |
Pollutant
endocrine system Environmental Engineering 010504 meteorology & atmospheric sciences urogenital system Chemistry business.industry Chemical oxygen demand Sewage 010501 environmental sciences 01 natural sciences Pollution Adsorption Environmental chemistry Soil retrogression and degradation Environmental Chemistry Nitrification Sewage treatment business Waste Management and Disposal Effluent hormones hormone substitutes and hormone antagonists 0105 earth and related environmental sciences |
| Zdroj: | Science of The Total Environment. :676-682 |
| ISSN: | 0048-9697 |
| Popis: | Bisphenol A (BPA) has caused widespread concern among scholars as a result of its estrogenic toxicity. It exists mainly in natural waters, sediments, and soil, as well as sewage and wastewater sludge. Considering that BPA is a common environmental pollutant that is removed along with chemical oxygen demand (COD), nitrogen, and phosphorus in drainage treatment systems, it is important to research the fate of BPA in sewage treatment systems. In this research, laboratory batch experiments on soil degradation and adsorption were conducted with 14C-BPA, aiming to discuss the transport and degradation characteristics of BPA in both simulated facilities and a soil trench. Based on the experimental results, the Freundlich model could be applied to fit the isothermal adsorption curve of the BPA in soil. A low mobility characteristic of BPA was discovered. The mineralization rate of BPA was fast and that of the reaction showed small fluctuations. After degradation, 21.3 and 17.7% of the BPA groups (the experimental group treated with ammonia oxidase (AMO) inhibitor and the control group) were converted into 14CO2, respectively. This indicates that the nitrification and degradation of BPA had a certain competitive relationship. Besides, nitrification did not significantly affect the soil residue of BPA. Through the soil trench test, the average removal rate of BPA in the soil trench was 85.5%. 14CO2 was discharged via the mineralization of BPA, accounting for 2.5% of the initial input. BPA easily accumulated in the bottom soil of the soil trench. BPA and its metabolites in the effluent accounted for 14.5% of the initial dosage. The residual extractable BPA and its metabolites in the soil accounted for 51.3%, and the remaining part of the unextractable residue represented 19.8% of the initial radioactive dosage. |
| Databáze: | OpenAIRE |
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