Nitrogen and Phosphorus Removal from Agricultural Runoff in Integrated Buffer Zones,Environmental Science & Technology

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Nitrogen and Phosphorus Removal from Agricultural Runoff in Integrated Buffer Zones
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2018-05-15 , DOI: 10.1021/acs.est.8b01036
Dominik Zak _{1,

2} , Brian Kronvang ₁ , Mette V. Carstensen ₁ , Carl C. Hoffmann ₁ , Ane Kjeldgaard ₁ , Søren E. Larsen ₁ , Joachim Audet _{1,

3} , Sara Egemose ₄ , Charlotte A. Jorgensen ₄ , Peter Feuerbach ₅ , Flemming Gertz ₆ , Henning S. Jensen ₄

Affiliation

Integrated buffer zones (IBZs) represent a novel form of edge-of-field technology in Northwest Europe. Contrary to the common riparian buffer strips, IBZs collect tile drainage water from agricultural fields by combining a ditch-like pond (POND), where soil particles can settle, and a flow-through filter bed (FILTERBED) planted with Alnus glutinosa (L.), a European alder (black alder). The first experimental IBZ facility was constructed and thoroughly tested in Denmark for its capability to retain various nitrogen (N) and phosphorus (P) species within the first three years after construction. We calculated the water and nutrient budget for the total IBZ and for the two compartments, POND and FILTERBED, separately. Furthermore, a tracer experiment using sodium bromide was conducted in order to trace the water flow and estimate the hydraulic residence time in the FILTERBEDs. The monthly average removal efficiency amounted to 10–67% for total N and 31–69% for total P, with performance being highest during the warm season. Accordingly, we suggest that IBZs may be a valuable modification of dry buffer strips in order to mitigate the adverse impacts of high nutrient loading from agricultural fields on the aquatic environment.

中文翻译：

综合缓冲区内农业径流中氮和磷的去除

集成缓冲区（IBZ）代表了西北欧洲领域边缘技术的一种新型形式。相反到公共河岸缓冲带，IBZs通过组合沟状池（池），其中，土壤颗粒可以安定收集来自农田瓦片排水，以及流通式过滤器床（FILTERBED）种植有赤杨（L.），欧洲al木（黑der木）。在丹麦建造并测试了第一个IBZ实验设施，并在建造后的最初三年内保留了各种氮（N）和磷（P）物种的能力。我们分别计算了整个IBZ以及两个分区POND和FILTERBED的水和养分预算。此外，进行了使用溴化钠的示踪剂实验，以追踪水流并估算FILTERBED中的水力停留时间。总氮的月平均去除效率为10–67％，总磷的平均去除效率为31–69％，在温暖季节表现最佳。因此，

更新日期：2018-05-16

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