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- Title
Emission of Carbon Dioxide and Methane from Duckweed Ponds for Stormwater Treatment.
- Authors
Jingjing Dai; Chiqian Zhang; Chung-Ho Lin; Zhiqiang Hu
- Abstract
This study determined the greenhouse gas emission from two laboratory-scale duckweed ponds for stormwater treatment. The rate of carbon dioxide (CO2) emission from the two duckweed systems was 1472 ± 721 mg/m²·d and 626 ± 234 mg/m²·d, respectively. After the removal of duckweeds, CO2 emissions decreased to 492 ± 281 mg/m²·d and 395 ± 53 mg/m²·d, respectively. The higher CO2 emissions in the duckweed systems were attributed to duckweed biomass decay on the pond soil surface. A thin-film model was able to predict the increasing CO2 concentrations in the closed static chamber during 2 weeks of sampling. The initial methane fluxes from the duckweed systems were 299 ± 74 mg/m²·d and 180 ± 91 mg/m²·d, respectively. After the removal of duckweeds, the flux increased to 559 ± 215 mg/m²·d and 328 ± 114 mg/m²·d, respectively.
- Subjects
GREENHOUSE gas mitigation; URBAN runoff management; CARBON dioxide; DUCKWEEDS; THIN films
- Publication
Water Environment Research (10614303), 2015, Vol 87, Issue 9, p805
- ISSN
1061-4303
- Publication type
Article
- DOI
10.2175/106143015X14362865226310