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首页> 外文期刊>Water Science and Technology >Controls on groundwater nitrogen contributions from on-site wastewater systems in coastal North Carolina
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Controls on groundwater nitrogen contributions from on-site wastewater systems in coastal North Carolina

机译：北卡罗莱纳州沿海现场废水系统对地下水氮贡献的控制

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摘要

The goal of this study was to evaluate the influence of soil type and separation distance tonwater table on dissolved inorganic nitrogen concentrations in groundwater adjacent to on-sitenwastewater systems. Groundwater nitrogen species (NO3n2-N and NH4n+-N) and groundwater levelsnadjacent to 16 on-site systems in three different soil groups (group I- sand, group II- coarse loamsnand group III -sandy clay loams) were monitored for 15 months (January 2007–March 2008)nin coastal North Carolina. On-site systems in soil group I had the highest concentrationsnof dissolved inorganic nitrogen (median of 18.9 mg/L) in groundwater, and most frequentlyn(mean 61%) exceeded 10 mg/L, followed by systems in soil group II (11.0 mg/L, 50%) and soilngroup III (2.6 mg/L, 9%), respectively. Groundwater NH4n+-N concentrations near on-site systemsnin soil groups I and II that maintained a 60 +cm separation to the seasonal high water tablenwere 4 mg/L lower in relation to systems that had ,60cm separation, but median NO3n2-Nnconcentrations were 6.5 mg/L higher. On-site systems in group I and II soils are prone tongroundwater nitrogen loading with separation distance often controlling the nitrogennspeciation in groundwater near on-site systems.
机译：这项研究的目的是评估土壤类型和分离距离水位对邻近现场废水系统的地下水中溶解的无机氮浓度的影响。在三个不同的土壤组（I组-砂，II组-粗壤土和III组-砂质壤土）中监测了与16个现场系统相邻的地下水氮物种（NO3n2-N和NH4n + -N）和地下水水平，持续了15个月（ 2007年1月至2008年3月）在北卡罗来纳州沿海地区。第一类土壤的现场系统在地下水中的溶解性无机氮浓度最高（中位数为18.9 mg / L），最常见（平均61％）超过10 mg / L，其次是第二类土壤的系统（11.0 mg / L）。 / L，50％）和土群III（2.6 mg / L，9％）。与间隔60cm的系统相比，与季节性高水位保持60 + cm距离的土壤组I和II的现场系统附近的地下水NH4n + -N浓度要低60 mg / cm，但中位数NO3n2-Nn值为6.5毫克/升更高。 I和II组土壤的现场系统容易产生地下水位氮，其分离距离通常会控制现场系统附近地下水的氮素形态。

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  • 来源
    《Water Science and Technology》 |2010年第6期|p.1-8|共8页
  • 作者

    Humphrey C. P. - ODriscoll M. A. - Zarate M. A.;

  • 作者单位

    C. P. Humphrey Jr. (corresponding author)Environmental Health Sciences Program,East Carolina University,3408 Carol Belk Bldg,27858-4353 Greenville NC,USAE-mail: cph0918@ecu.eduM. A. O’DriscollDepartment of Geological Sciences,East Carolina University,204 Graham Bldg,27858-4353 Greenville NC,USAE-mail: odriscollm@ecu.eduM. A. ZarateEnvironmental Health Sciences Program,East Carolina University,27858-4353 Greenville NC,USAM. A. ZarateCurrent address: Centers for Disease Control andPrevention,30341 Atlanta GA,USAE-mail: mcz4@cdc.gov;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    coastal, nitrogen, septic system, soil;

    机译：沿海;氮;化粪池;土壤;

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