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Wastewater treatment plants (WWTPs) as a source of sediment contamination by toxic organic pollutants and fecal sterols in a semi-enclosed bay in Korea

Title
Wastewater treatment plants (WWTPs) as a source of sediment contamination by toxic organic pollutants and fecal sterols in a semi-enclosed bay in Korea
Author
문효방
Keywords
Macrobenthic Community; Wastewater treatment plant (WWTP); PCDD/Fs; Polychaete; Aquatic ecosystem
Issue Date
2008-10
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
CHEMOSPHERE, v. 73, No. 6, Page. 880-889
Abstract
Toxic organic contaminants and a macrobenthic community were assayed in sediments collected near a wastewater treatment plant (WWTP) outfall to assess the impact of WWTP discharges on an aquatic environment. Average concentrations of toxic organic contaminants in sediments from 20 locations were 96.7 ng TEQ/kg dry matter for PCDD/Fs, 1.84 ng TEQ/kg dry matter for dioxin-like PCBs, 29.1 mu g/kg dry matter for PBDEs, 411 mu g/kg dry matter for nonylphenols, 1021 mu g/kg dry matter for fecal sterols, and 928 mu g/kg dry matter for PAHs. Concentrations of all the organic contaminants and fecal sterols varied widely and there was a clear decrease in concentration gradients with increasing distances from the WWTP outfall. This result suggests that WWTP activities contribute to contamination by organic chemicals. A survey of benthic organisms showed the dominance of a few polychaete species, indicating a deterioration of the macrobenthic community by the WWTP discharge. Non-parametric multidimensional scaling (MDS) ordination and Spearman correlation analyses showed that organic contamination is associated with the benthic community structure. For polychaete species, the sensitive species for organic contaminants was Paraprionospio pinnata, while contaminant-tolerant species were Spiochaetopterus koreana and Capitella capitata. BIOENV analyses of all locations suggested PCDDs and PCDFs as the major contaminants influencing the structure of the macrobenthic community. The present study highlights that continuous WWTP discharges contribute to severe organic contamination and risks for the benthic community in an aquatic ecosystem. (c) 2008 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0045653508009454http://repository.hanyang.ac.kr/handle/20.500.11754/80704
ISSN
0045-6535
DOI
10.1016/j.chemosphere.2008.07.038
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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