Performance of a full scale constructed wetland as ecological practice for agricultural drainage water treatment in Northern Italy

被引:34
|
作者
Lavrnic, Stevo [1 ]
Nan, Xi [1 ]
Blasioli, Sonia [1 ]
Braschi, Ilaria [1 ]
Anconelli, Stefano [2 ]
Toscano, Attilio [1 ]
机构
[1] Univ Bologna, Dept Agr & Food Sci, Alma Mater Studiorum, Viale Giuseppe Fanin 40-50, I-40127 Bologna, Italy
[2] Consorzio Bonifica Canale Emiliano Romagnolo, Via Ernesto Masi 8, I-40137 Bologna, Italy
关键词
Nature-based solution; Nutrients; Surface flow constructed wetland; Vegetation; WASTE-WATER; PHOSPHORUS RETENTION; REMOVAL; ACCUMULATION; NUTRIENTS; DYNAMICS; NITROGEN; DESIGN; REUSE;
D O I
10.1016/j.ecoleng.2020.105927
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Non-point sources of pollution, primarily agricultural drainage waters, can cause eutrophication and deterioration of water bodies. Surface flow constructed wetlands (SFCWs) are an ecological solution that can represent an efficient barrier and prevent agricultural pollutants from reaching other ecosystems. However, to better manage them and to understand removal processes occurring, it is important to study SFCWs that are functioning for longer periods of time and assess their efficiencies. This study concentrates on a full-scale SFCW in the Northern Italy that is used for agricultural drainage water treatment since the year 2000. An in-deep monitoring done for two years (2018 and 2019) showed that the system achieved satisfactory retention of up to 82% for TSS and up to 78% for TN and NO3--N. TP retention seemed to be poor (-27%), but further analysis showed that the SFCW performed well in this aspect as well, and that it is important to include precipitation loads in the overall balance. Soil content of nutrients and different trace elements did not show considerable differences in respect to the beginning of the monitoring period, and the uptake rates of TN and TP by above-ground vegetation were in the range 19.0-26.3 and 1.6-2.1 g m(-2), respectively.
引用
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页数:10
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