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首页> 外文期刊>Journal of environmental health >Fate and transport of phosphate from an onsite wastewater system in Beaufort County, North Carolina.
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Fate and transport of phosphate from an onsite wastewater system in Beaufort County, North Carolina.

机译：北卡罗来纳州博宇福县现场废水系统的命运和磷酸盐运输。

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摘要

The objectives for the study described in this article were to evaluate the fate and transport of onsite wastewater system (OWS)-derived phosphate from a residential system in Beaufort County, North Carolina, and to determine if current OWS setback regulations are sufficient to prevent elevated phosphate discharge to surface waters. Piezometers were installed in nests at different depths adjacent to drain-field trenches and up- and down-gradient of a residential OWS. Groundwater and septic effluent phosphate concentrations, temperature, pH, dissolved oxygen, and electrical conductivity were monitored every two months from February 2011 to October 2011 (five times). The mean groundwater phosphate concentration beneath the OWS (3.05 +/- 0.74 mg/L) was not significantly different than septic effluent (2.97 +/- 0.76 mg/L) and was elevated relative to background groundwater (0.14 +/- 0.12 mg/L). Groundwater phosphate concentrations were inversely related (r2 = .83) to distance from the system. Onsite system setback regulations may have to be increased (>30 m) in some areas to ensure groundwater phosphate concentrations are reduced to background concentrations before discharge to surface waters.
机译：本文中描述的研究目标是评估从北卡罗来纳州立景县的住宅系统的住宅系统（OWS）磷酸盐的命运和运输，并确定当前OWS挫折规定是否足以防止升高磷酸盐放电到表面水。压力计安装在巢穴中，以与漏极场沟槽相邻的不同深度和住宅OWS的上升和下降梯度。从2011年2月到2011年2月到2011年10月（五次）每两个月监测地下水和化脓性污水磷酸盐浓度，温度，pH，溶解氧和导电性。 OWS（3.05 +/- 0.74 mg / L）下方的平均地下水磷酸盐浓度与脓菌污水（2.97 +/- 0.76 mg / L）显着不同，相对于背景地下水升高（0.14 +/- 0.12 mg / l）。地下水磷酸盐浓度与系统的距离相反（R2 = .83）。在某些区域可能必须增加（> 30米）的现场系统挫折规定，以确保在排出到表面水的背景下将地下水磷酸盐浓度降低到背景浓度。

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