[1]FANG Songlin,CAO Pangong.Purification Effects of Baffled Constructed Wetland on Rain Runoff in the Mining Area[J].Research of Soil and Water Conservation,2017,24(05):126-131.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 05
Page number:
126-131
Column:
Public date:
2017-10-28
- Title:
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Purification Effects of Baffled Constructed Wetland on Rain Runoff in the Mining Area
- Author(s):
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FANG Songlin, CAO Pangong
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Department of Design, College of Liberal Arts, Xi’an Shiyou University, Xi’an 710065, China
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- Keywords:
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constructed wetland; mining area; rain runoff; purification effects
- CLC:
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X52
- DOI:
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- Abstract:
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According to water characteristics of the rain runoff in a catchment of Pubai mining area, Weinan, an improved baffled constructed wetland (BCW) was used for purification experiment study of simulated and on-the-spot rain runoff. The purification effects of simulated rain runoff were compared in different operated phases of BCW. Meanwhile, the variation of the pollutants (CODCr, SS, TN, TP, NH4+-N, Pb, Zn and Cu) along the BCW and their removal mechanism were analyzed and discussed, respectively. In the purification study of on-the-spot rain runoff, removal rates of CODCr, SS, TN, TP, NH4+-N were 82.3%, 65.9%, 71.2%, 73.5% and 94.8%, respectively, removal rates of Pb, Zn and Cu were 91.3%,94.5% and 81.2%, respectively, the effluent met the grade Ⅲ. In the simulated experiment, the effluent water quality of BCW system met the needs of Environmental Quality Standard for Surface Water (GB3838—2002) Ⅲ, TN met Ⅳ, and most of the pollutants were removed in the front of the BCW, especially CODCr, TP, SS and Pb. The removal rates gradually decreased with the units. In total, there was remarkable treatment performance of the mining rain runoff when BCW system was used. BCW system can also withstand strong shock load. Moreover, and can be applied to control urban surface runoff pollution and use the rainwater.