...
首页> 外文期刊>Environmental Science & Technology >Endobenthic Organisms Exposed to Chronically High Chloride from Groundwater Discharging along Freshwater Urban Streams and Lakeshores
【24h】

Endobenthic Organisms Exposed to Chronically High Chloride from Groundwater Discharging along Freshwater Urban Streams and Lakeshores

机译:沿淡水城市河流和湖岸排泄的地下水暴露于慢性高氯化物的内生生物

获取原文
获取原文并翻译 | 示例
           

摘要

Chloride, especially from road salt, is one of the most ubiquitous contaminants of urban groundwater in temperate climates. The discharge of chloride-laden groundwater to freshwater ecosystems may pose a heightened risk to endobenthic organisms (buried in sediments), which may experience high concentrations prior to dilution from the overlying water. However, available exposure data is limited. Presented here are 22 chloride data sets from 15 urban sites across Canada, encompassing >1300 samples of shallow discharging groundwater collected principally during summer through autumn. Over half of the sites had an average chloride concentration above the long-term aquatic life guideline (120 mg/L), while 14% of each site's samples, on average, surpassed the short-term guideline (640 mg/L). Chloride concentrations frequently varied substantially (even >1000 mg/L) between adjacent locations (mostly <20 m separation), indicating patchy exposure. Chloride/bromide ratios, artificial sweeteners, and other tracers suggest a predominant contribution from road salt, with wastewater and landfill leachate important at some sites. Overall, these concentrations exceed those typically reported for urban wells and streams (even during the snowmelt period) in similar climates. These findings suggest that high chloride concentrations in shallow groundwater, largely from road salt, present a long-term threat to endobenthic organisms of urban surface waters in cold-region countries.
机译:在温带气候下,氯化物,尤其是路盐中的氯化物,是城市地下水中最普遍存在的污染物之一。含氯地下水向淡水生态系统的排放可能会给底栖生物(埋在沉积物中)带来更大的风险,这些底栖生物在从上层水稀释之前可能会经历高浓度。但是,可用的曝光数据有限。这里展示的是来自加拿大15个城市地区的22个氯化物数据集,其中包括1300多个浅层排放地下水样本,这些样本主要是在夏季至秋季收集的。超过一半的站点的平均氯化物浓度高于长期水生生物指标(120 mg / L),而每个站点的样本平均有14%超过了短期指标(640 mg / L)。相邻位置之间的氯离子浓度经常有很大的变化(甚至> 1000 mg / L)(大多数为<20 m间隔),表明存在斑驳的暴露。氯化物/溴化物的比率,人造甜味剂和其他示踪剂表明,道路用盐占了主要部分,废水和垃圾渗滤液在某些场所很重要。总体而言,这些浓度超过了在类似气候下城市井和溪流(即使在融雪期)通常报告的浓度。这些发现表明,在寒冷地区国家,浅层地下水中的高氯化物浓度主要来自道路盐分,这对城市地表水的内吞性生物构成了长期威胁。

著录项

  • 来源
    《Environmental Science & Technology》 |2019年第16期|9389-9397|共9页
  • 作者

    Roy James W.;

  • 作者单位

    Environm & Climate Change Canada Water Sci & Technol Directorate Burlington ON L7S 1A1 Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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