Performance of constructed wetlands and associated mechanisms of PAHs removal with mussels

Kang, Y; Xie, H; Li, B; Zhang, J; Hao Ngo, H; Guo, W; Guo, Z; Kong, Q; Liang, S; Liu, J; Cheng, T; Zhang, L

Performance of constructed wetlands and associated mechanisms of PAHs removal with mussels

Kang, Y Xie, H Li, B Zhang, J Hao Ngo, H

Guo, W

Guo, Z Kong, Q Liang, S Liu, J Cheng, T Zhang, L

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Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2019, 357 pp. 280 - 287
Issue Date:: 2019-02-01

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Field	Value	Language
dc.contributor.author	Kang, Y	en_US
dc.contributor.author	Xie, H	en_US
dc.contributor.author	Li, B	en_US
dc.contributor.author	Zhang, J	en_US
dc.contributor.author	Hao Ngo, H https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858	en_US
dc.contributor.author	Guo, Z	en_US
dc.contributor.author	Kong, Q	en_US
dc.contributor.author	Liang, S	en_US
dc.contributor.author	Liu, J	en_US
dc.contributor.author	Cheng, T	en_US
dc.contributor.author	Zhang, L	en_US
dc.date.available	2021-02-02T18:05:38Z
dc.date.issued	2019-02-01	en_US
dc.identifier.citation	Chemical Engineering Journal, 2019, 357 pp. 280 - 287	en_US
dc.identifier.issn	1385-8947	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132563
dc.description.abstract	© 2018 Elsevier B.V. The role of mussels in laboratory-scale constructed wetlands (CWs) where wastewater was contaminated with five typical polycyclic aromatic hydrocarbons (PAHs) (three 3-ring PAHs and two 4-ring PAHs) was investigated in this study. The CWs performance and PAHs removal mechanisms were well studied. Results indicated that these five PAHs improved removal efficiencies of NO3-N but in the case of NH4-N accumulation occurred. Of the five added PAHs, the 4-ring PAHs were more refractory with higher concentrations in effluent than 3-ring PAHs. By monitoring the five PAHs concentration in water, mussels had excellent removal efficiency of the five PAHs (97%). According to the mass balance calculation, mussels promoted plant uptake of five PAHs, contributing 15.2% of five PAHs removal in CWs. The PAHs could also accumulate in mussels through ingested substrate. Thus, mussels presented a positive correlation with five PAHs purification at a depth of 0–10 cm in substrate, which was 34.7 μg/kg lower than the control group. Due to the purification and enhanced aerated degradation, mussels performed better in removing 3-ring PAHs in substrate, decreasing 8.3% for 3-ring PAHs compared to the control. A positive correlation between five PAHs addition and nirS, nrfA genes was observed. However, PAHs showed negative impact on nitrifying bacteria (amoA). The significant correlations between mussels and five PAHs made it possible to improve CWs for PAHs treatment with aquatic faunas.	en_US
dc.relation.ispartof	Chemical Engineering Journal	en_US
dc.relation.isbasedon	10.1016/j.cej.2018.09.152	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Chemical Engineering	en_US
dc.title	Performance of constructed wetlands and associated mechanisms of PAHs removal with mussels	en_US
dc.type	Journal Article
utslib.citation.volume	357	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0907 Environmental Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	357	en_US

Abstract:

© 2018 Elsevier B.V. The role of mussels in laboratory-scale constructed wetlands (CWs) where wastewater was contaminated with five typical polycyclic aromatic hydrocarbons (PAHs) (three 3-ring PAHs and two 4-ring PAHs) was investigated in this study. The CWs performance and PAHs removal mechanisms were well studied. Results indicated that these five PAHs improved removal efficiencies of NO3-N but in the case of NH4-N accumulation occurred. Of the five added PAHs, the 4-ring PAHs were more refractory with higher concentrations in effluent than 3-ring PAHs. By monitoring the five PAHs concentration in water, mussels had excellent removal efficiency of the five PAHs (97%). According to the mass balance calculation, mussels promoted plant uptake of five PAHs, contributing 15.2% of five PAHs removal in CWs. The PAHs could also accumulate in mussels through ingested substrate. Thus, mussels presented a positive correlation with five PAHs purification at a depth of 0–10 cm in substrate, which was 34.7 μg/kg lower than the control group. Due to the purification and enhanced aerated degradation, mussels performed better in removing 3-ring PAHs in substrate, decreasing 8.3% for 3-ring PAHs compared to the control. A positive correlation between five PAHs addition and nirS, nrfA genes was observed. However, PAHs showed negative impact on nitrifying bacteria (amoA). The significant correlations between mussels and five PAHs made it possible to improve CWs for PAHs treatment with aquatic faunas.

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http://hdl.handle.net/10453/132563