Analysis of carbon sink effects for saline constructed wetlands vegetated with mangroves to treat mariculture wastewater and sewage

In this study, two saline mangrove artificial wetlands, Datang Saline Constructed Wetland (DSCW) created for treating mariculture wastewater and sewage, vegetated with Avicennia marina, and Mangrove Wetland Park (MWP) created for mangrove conservation, vegetated with Rhizophora stylosa, were selecte...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2019-04, Vol.79 (8), p.1474-1483
Main Authors: Yang, Lei, Yuan, Chung-Shin
Format: Article
Language:English
Subjects:
Aquaculture
Artificial wetlands
Carbon Dioxide
Carbon Sequestration
Carbon sinks
Carbon sources
Climate change
Emission measurements
Emissions
Environmental conditions
Fluctuations
Flux
Global warming
Greenhouse Effect
Greenhouse gases
Mangrove conservation
Mangroves
Marine aquaculture
Methane
Microorganisms
Nitrous Oxide
Sewage
Waste Disposal, Fluid - methods
Waste Water
Wastewater
Wastewater treatment
Wetlands
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, two saline mangrove artificial wetlands, Datang Saline Constructed Wetland (DSCW) created for treating mariculture wastewater and sewage, vegetated with Avicennia marina, and Mangrove Wetland Park (MWP) created for mangrove conservation, vegetated with Rhizophora stylosa, were selected for assessment of carbon sequestration and carbon budget based on measuring greenhouse gas (GHG) emissions and net primary productivities. The average GHG flux and net carbon sequestration flux as carbon dioxide equivalent (CO eq.) were measured. The results showed that the GHG flux emitted from DSCW and MWP were 2,128 and 2,148 g CO eq./m -yr, respectively, while the flux of net sequestered carbon was 2,909 and 3,178 g CO eq./m -yr, respectively, which achieved carbon budget values of -676 and -230 g CO eq./m -yr, respectively, exhibiting carbon source effects. Some amounts of N O, with a high global warming potential of 265, emitted from both artificial wetland systems might cause high GHG flux as CO eq. emitted from the wetland systems. It was concluded that both the nitrogenous contents and environmental conditions suitable for microbial production of N O might be the main factors to change the wetland systems from carbon sinks to carbon sources.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2019.145