Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A

A constructed wetland (CW) is a low-cost, eco-friendly, easy-to-maintain, and widely applicable technology for treating various pollutants in the waste landfill leachate. This study determined the effects of the selection and compiling strategy of substrates used in CWs on the treatment performance...

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Autores principales:	Rajani Ghaju Shrestha, Daisuke Inoue, Michihiko Ike
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	bisphenol a substrate compilation substrate selection synthetic leachate vertical-flow constructed wetland Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/c8bd3e2124f94bbf9295a0be01db5ef4
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spelling	oai:doaj.org-article:c8bd3e2124f94bbf9295a0be01db5ef42021-11-06T11:22:19ZEffects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A0273-12231996-973210.2166/wst.2021.349https://doaj.org/article/c8bd3e2124f94bbf9295a0be01db5ef42021-09-01T00:00:00Zhttp://wst.iwaponline.com/content/84/6/1428https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732A constructed wetland (CW) is a low-cost, eco-friendly, easy-to-maintain, and widely applicable technology for treating various pollutants in the waste landfill leachate. This study determined the effects of the selection and compiling strategy of substrates used in CWs on the treatment performance of a synthetic leachate containing bisphenol A (BPA) as a representative recalcitrant pollutant. We operated five types of lab-scale vertical-flow CWs using only gravel (CW1), a sandwich of gravel with activated carbon (CW2) or brick crumbs (CW3), and two-stage hybrid CWs using gravel in one column and activated carbon (CW4) or brick crumbs (CW5) in another to treat synthetic leachate containing BPA in a 7-d sequential batch mode for 5 weeks. CWs using activated carbon (CW2 and CW4) effectively removed ammonium nitrogen (NH4-N) (99–100%), chemical oxygen demand (COD) (93–100%), and BPA (100%), indicating that the high adsorption capacity of activated carbon was the main mechanism involved in their removal. CW5 also exhibited higher pollutant removal efficiencies (NH4-N: 94–99%, COD: 89–98%, BPA: 89–100%) than single-column CWs (CW1 and CW3) (NH4-N: 76–100%, COD: 84–100%, BPA: 51–100%). This indicates the importance of the compiling strategy along with the selection of an appropriate substrate to improve the pollutant removal capability of CWs. HIGHLIGHTS This study tested the performance of treating synthetic landfill leachate containing BPA by CWs with different CW types, substrates and substrate compiling methods.; Single-column and two-stage vertical-flow CWs were prepared using gravel, brick crumbs and activated carbon.; The results clarified the importance of substrate compiling strategy in addition to substrate selection for improving the treatment ability.;Rajani Ghaju ShresthaDaisuke InoueMichihiko IkeIWA Publishingarticlebisphenol asubstrate compilationsubstrate selectionsynthetic leachatevertical-flow constructed wetlandEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 6, Pp 1428-1437 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bisphenol a substrate compilation substrate selection synthetic leachate vertical-flow constructed wetland Environmental technology. Sanitary engineering TD1-1066
spellingShingle	bisphenol a substrate compilation substrate selection synthetic leachate vertical-flow constructed wetland Environmental technology. Sanitary engineering TD1-1066 Rajani Ghaju Shrestha Daisuke Inoue Michihiko Ike Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A
description	A constructed wetland (CW) is a low-cost, eco-friendly, easy-to-maintain, and widely applicable technology for treating various pollutants in the waste landfill leachate. This study determined the effects of the selection and compiling strategy of substrates used in CWs on the treatment performance of a synthetic leachate containing bisphenol A (BPA) as a representative recalcitrant pollutant. We operated five types of lab-scale vertical-flow CWs using only gravel (CW1), a sandwich of gravel with activated carbon (CW2) or brick crumbs (CW3), and two-stage hybrid CWs using gravel in one column and activated carbon (CW4) or brick crumbs (CW5) in another to treat synthetic leachate containing BPA in a 7-d sequential batch mode for 5 weeks. CWs using activated carbon (CW2 and CW4) effectively removed ammonium nitrogen (NH4-N) (99–100%), chemical oxygen demand (COD) (93–100%), and BPA (100%), indicating that the high adsorption capacity of activated carbon was the main mechanism involved in their removal. CW5 also exhibited higher pollutant removal efficiencies (NH4-N: 94–99%, COD: 89–98%, BPA: 89–100%) than single-column CWs (CW1 and CW3) (NH4-N: 76–100%, COD: 84–100%, BPA: 51–100%). This indicates the importance of the compiling strategy along with the selection of an appropriate substrate to improve the pollutant removal capability of CWs. HIGHLIGHTS This study tested the performance of treating synthetic landfill leachate containing BPA by CWs with different CW types, substrates and substrate compiling methods.; Single-column and two-stage vertical-flow CWs were prepared using gravel, brick crumbs and activated carbon.; The results clarified the importance of substrate compiling strategy in addition to substrate selection for improving the treatment ability.;
format	article
author	Rajani Ghaju Shrestha Daisuke Inoue Michihiko Ike
author_facet	Rajani Ghaju Shrestha Daisuke Inoue Michihiko Ike
author_sort	Rajani Ghaju Shrestha
title	Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A
title_short	Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A
title_full	Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A
title_fullStr	Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A
title_full_unstemmed	Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A
title_sort	effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol a
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/c8bd3e2124f94bbf9295a0be01db5ef4
work_keys_str_mv	AT rajanighajushrestha effectsofselectionandcompilingstrategyofsubstratesincolumntypeverticalflowconstructedwetlandsonthetreatmentofsyntheticlandfillleachatecontainingbisphenola AT daisukeinoue effectsofselectionandcompilingstrategyofsubstratesincolumntypeverticalflowconstructedwetlandsonthetreatmentofsyntheticlandfillleachatecontainingbisphenola AT michihikoike effectsofselectionandcompilingstrategyofsubstratesincolumntypeverticalflowconstructedwetlandsonthetreatmentofsyntheticlandfillleachatecontainingbisphenola
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Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A

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