...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Nitrogen sources and sinks in a wastewater impacted saline aquifer beneath the Florida Keys, USA
【24h】

Nitrogen sources and sinks in a wastewater impacted saline aquifer beneath the Florida Keys, USA

机译：废水中的氮源和汇影响了美国佛罗里达礁岛下方的盐水层

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Groundwater wells surrounding a high volume advance treatment wastewater (ATW) disposal well in the Florida Keys were monitored for nitrate, nitrite, and ammonium concentrations over a 14 month period. Nutrient concentrations in the shallow subsurface (9 m) show a bimodal distribution between the low salinity wastewater plume and the ambient brackish to saline groundwaters. High NO_3~- concentrations are found within the ATW plume while the highest NH_4~+ concentrations are found in shallow wells outside of the plume. Evidence suggests that the overlying mud layer unique to this study site contributes the bulk of the NH_4~+ observed in these wells. NO_3~- concentrations at 9 m wells varied by a factor of four in response to concurrent variations in ATW NO_3~- loads over the coarse of the study. Estimated NO_3~- uptake rates varied from 32 ± 29 to 98 ± 69 and did not directly correlate with ATW NO_3~- loading as we hypothesized. We estimate that 70 ± 34% of the NO_3~- from the treatment plant is removed from solution in the subsurface of the study site. Considerable decreases in NO_3~- concentration and enrichment of ~(15)NO_3~- was observed in many wells, indicating significant denitrification or anaerobic ammonium oxidation is occurring in the subsurface. Dissolved inorganic nitrogen concentrations, distributions, and ~(15)N compositions indicate that denitrification is likely the dominant mechanism for N removal in the ATW plume at Key Colony Beach, Florida.
机译：在14个月的时间内，监测了佛罗里达礁岛群中大量预处理废水（ATW）处理井周围的地下水井中的硝酸盐，亚硝酸盐和铵的浓度。浅层地下（9 m）中的养分浓度在低盐度废水羽流和咸咸水至地下水之间呈双峰分布。在ATW羽流中发现了较高的NO_3〜-浓度，而在羽流之外的浅井中发现了最高的NH_4〜+浓度。有证据表明，该研究点独特的上覆泥层贡献了这些井中观测到的大部分NH_4〜+。在整个研究范围内，由于ATW NO_3〜-负荷的同时变化，9 m井的NO_3〜-浓度变化了四倍。估计的NO_3〜-吸收率从32±29到98±69不等，并且与我们假设的ATW NO_3〜-负荷没有直接关系。我们估计处理厂的NO_3〜-中有70±34％是从研究地点地下的溶液中去除的。在许多井中观察到NO_3〜-浓度的显着下降和〜（15）NO_3〜-的富集，表明地下发生了明显的反硝化或厌氧铵氧化。溶解的无机氮浓度，分布和〜（15）N组成表明，反硝化可能是佛罗里达州Key Colony Beach的ATW羽流中氮去除的主要机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号