Organic matter,anion, and metal wastewater treatment in Damyang surface-flow constructed wetlands in Korea |
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| Authors: | Noeon Park Joon Ha Kim Jaeweon Cho |
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| Affiliation: | 1. Plant Ecology and Environmental Science Division, CSIR- National Botanical Research Institute, Lucknow 226 001, India;2. Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi 221 005, India;1. Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China;2. Nantong University, Nantong 226019, China;1. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, China;2. College of Life Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China |
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| Abstract: | Surface-flow wetlands constructed with Acorus and Typha plants, connected to a wastewater treatment plant, were investigated with respect to organics (dissolved organic matter), anions (nitrate, sulfate, and phosphate), metals (Cu, Ni, Zn, Fe, and Mn), and metalloids (As). The results of the research indicated: (1) effluent organic matter (EfOM), based on dissolved organic carbon (DOC), was not efficiently removed by the wetlands. However, the hydrophobic, transphilic, and hydrophilic EfOM fractions varied throughout the wetlands, as identified by XAD-8/4 resins. (2) Nitrate, as compared to sulfate and phosphate, was efficiently removed, especially in the Typha wetland pond that had long retention time, under anoxic condition. (3) Most of the heavy metals were ineffectively removed via the wetland ponds. However, the iron concentration increased in the Typha wetland pond, which was probably due to its reduction under anoxic condition. |
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