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首页> 外文期刊>Environmental Management >Nutrient Removal and Loading Rate Analysis of Louisiana Forested Wetlands Assimilating Treated Municipal Effluent
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Nutrient Removal and Loading Rate Analysis of Louisiana Forested Wetlands Assimilating Treated Municipal Effluent

机译:路易斯安那州森林湿地吸收处理后的城市污水的养分去除和负荷率分析

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摘要

The relationship between nutrient removal and loading rate was examined using data from five forested wetlands in Louisiana that have received secondarily treated effluent from 3 to 60 years. Loading rates ranged from 0.65 to 26.80 g/m~2/yr for total nitrogen and 0.18 to 8.96 g/m~2/yr for total phosphorus. At loading rates below 20 g/m~2/yr, total nitrogen concentrations in surface waters of Louisiana forested wetlands were reduced to background concentrations (i.e., ≤3 mg/l). Similarly, at loading rates below 2 g/m~2/yr, total phosphorus concentrations were also generally reduced to background concentrations (i.e., ≤ 1 mg/l). These data demonstrate that freshwater forested wetlands can reduce nutrient concentrations in treated effluent to background concentrations present in relatively undisturbed wetlands. An understanding of the relationship between loading rates and nutrient removal in natural wetlands is important, particularly in Louisiana where discharges of fresh water are being used in ecosystem restoration.
机译:使用来自路易斯安那州五个森林湿地的数据检查了养分去除与负荷率之间的关系,这些湿地在3至60年间接受了二次处理。总氮的加载速率为0.65至26.80 g / m〜2 / yr,总磷的加载速率为0.18至8.96 g / m〜2 / yr。在低于20 g / m〜2 / yr的负荷速率下,路易斯安那州森林湿地地表水中的总氮浓度降至背景浓度(即≤3mg / l)。同样,在低于2 g / m〜2 / yr的加载速率下,总磷浓度通常也降低到背景浓度(即≤1 mg / l)。这些数据表明,淡水森林湿地可以将处理后的污水中的养分浓度降低到相对未受干扰的湿地中的背景浓度。了解自然湿地的负荷率与养分去除之间的关系非常重要,尤其是在路易斯安那州,那里的淡水排放正用于生态系统的恢复。

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