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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：北卡罗来纳州博福特县现场废水处理系统中磷酸盐的去向和运输。

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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：本文所述研究的目的是评估北卡罗来纳州博福特县居民系统中源自废水系统（OWS）的磷酸盐的结局和运输，并确定当前的OWS挫折法规是否足以防止污染物排放的升高磷酸盐排放到地表水。测压计安装在与排水沟和居民OWS上下坡相邻的不同深度的巢中。从2011年2月至2011年10月（每5次）每两个月监测一次地下水和化粪池污水的磷酸盐浓度，温度，pH，溶解氧和电导率。 OWS下的平均地下水磷酸盐浓度（3.05 +/- 0.74 mg / L）与化粪池污水（2.97 +/- 0.76 mg / L）并无显着差异，并且相对于背景地下水（0.14 +/- 0.12 mg / L）有所提高L）。地下水中磷酸盐的浓度与距系统的距离成反比（r2 = 0.83）。在某些区域，可能必须提高现场系统的挫折规定（> 30 m），以确保在排放到地表水之前将地下水中的磷酸盐浓度降低到本底浓度。

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