BAIQiang,LIWei,DONGCong-jian,et al.Degradation Characteristics of Phthalates and Polycyclic Aromatic Hydrocarbons in DE Oxidation Ditch[J].China Water & Wastewater,2023,39(7):89-94.
Degradation Characteristics of Phthalates and Polycyclic Aromatic Hydrocarbons in DE Oxidation Ditch
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第7期
Page:
89-94
Column:
Date of publication:
2023-04-01
- Keywords:
- phthalates; polycyclic aromatic hydrocarbons; DE oxidation ditch; degradation characteristics
- Abstract:
- The concentrations of phthalates (PAEs) and polycyclic aromatic hydrocarbons (PAHs) in water phase and sludge phase in each structure and DE oxidation ditch of Beishiqiao Wastewater Treatment Plant in Xi’an was detected by gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS). Five kinds of PAEs and six kinds of PAHs were detected in the influent from the wastewater treatment plant, and the biological treatment unit was the main place for their removal. In anaerobic selector, the removal rate of PAEs in water phase in descending order was DEHA (33.6%), DEHP (33.1%), DEP (25.7%), DBP (24.6%) and DMP (17.5%), and that of PAHs in water phase in descending order was Chr (35.9%), Pyr (35.0%), Flu (32.7%), Phe (30.3%), Ant (28.0%) and Nap (27.3%), which was mainly caused by the dilution and adsorption of the returned sludge from the secondary sedimentation tank. After the treatment of the subsequent DE oxidation ditch, the removal rate of PAEs in water phase in descending order was DEP (89.3%), DMP (86.4%), DBP (58.0%), DEHP (29.4%) and DEHA (19.0%), and that of PAHs in water phase in descending order was Nap (68.8%), Ant (58.3%), Flu (48.6%), Phe (45.7%), Pyr (12.3%) and Chr (8.5%). In the sludge phase, the concentrations of these two substances remained basically unchanged, indicating that biodegradation was the main reason for the removal of PAEs and PAHs.
Last Update:
2023-04-01