Occurrence and removal of polycyclic aromatic hydrocarbons and their derivatives in an ecological wastewater treatment plant in South China and effluent impact to the receiving river

Ecological wastewater treatment plant (EWWTP), a kind of emerging wastewater treatment plant (WWTP) in recent years, combined microbiology with botany which is efficient for the removal of nitrogen and organic matter, as well as deodorization. The occurrence and removal of micro-organic pollutants i...

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Veröffentlicht in:Environmental science and pollution research international 2019-02, Vol.26 (6), p.5638-5644
Hauptverfasser: Qiao, Meng, Fu, Lujing, Cao, Wei, Bai, Yaohui, Huang, Qiuxin, Zhao, Xu
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Fu, Lujing
Cao, Wei
Bai, Yaohui
Huang, Qiuxin
Zhao, Xu
description Ecological wastewater treatment plant (EWWTP), a kind of emerging wastewater treatment plant (WWTP) in recent years, combined microbiology with botany which is efficient for the removal of nitrogen and organic matter, as well as deodorization. The occurrence and removal of micro-organic pollutants in EWWTPs were still not well known. Polycyclic aromatic hydrocarbons (PAHs) and their typical derivatives (SPAHs) including the oxygenated PAHs (OPAHs), chlorinated PAHs (ClPAHs), and methyl PAHs (MPAHs) were investigated in an EWWTP in Guangdong Province, China. The concentrations of the Σ6 OPAHs (114–384 ng/L) were higher than the Σ16 PAHs (92–250 ng/L), and much higher than the Σ4 MPAHs (13–64 ng/L) and Σ9 ClPAHs (2–3 ng/L) in the EWWTP and the effluent receiving river. The total removal efficiencies of the PAHs, OPAHs, MPAHs, and ClPAHs in the EWWTP (43 ± 14%, 41 ± 7%, 55 ± 16%, and 18 ± 4%) were lower than the traditional WWTPs, probably due to the lower concentration of the sludge in the ecological treatment. The advanced treatment process (microfiltration and UV disinfection treatment) contributed much less (0–20%) to the whole removal efficiency than the ecological treatment (80–100%). The effluent from the EWWTP slightly reduced the PAHs and SPAHs concentrations in the receiving river. The high concentrations of the PAHs and SPAHs in the receiving river were similar to the influent of the EWWTP, indicating that some untreated wastewater was directly discharged to the river, especially in the upstream.
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subjects Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Botany
Deodorization
Derivatives
Disinfection
Earth and Environmental Science
Ecology
Ecotoxicology
Effluents
Environment
Environmental Chemistry
Environmental Health
Environmental science
Microbiology
Microfiltration
Nitrogen removal
Organic matter
Pollutants
Polycyclic aromatic hydrocarbons
Research Article
Rivers
Sludge
Ultraviolet radiation
Waste Water Technology
Wastewater treatment
Wastewater treatment plants
Water Management
Water Pollution Control
Water treatment
title Occurrence and removal of polycyclic aromatic hydrocarbons and their derivatives in an ecological wastewater treatment plant in South China and effluent impact to the receiving river
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