• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Anthropogenic Rare Earth Elements: Gadolinium in a Small Catchment in Guizhou Province Southwest China
【2h】

Anthropogenic Rare Earth Elements: Gadolinium in a Small Catchment in Guizhou Province Southwest China

机译：人为稀土元素：贵州西南部小流域中的d

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rare earth elements (REEs), known as “industrial vitamins”, are widely used in medical treatment, industry, agriculture, etc. However, with the increasing demand for REEs, excess REEs, such as gadolinium (Gd), are considered micropollutants in the environment. In this paper, the distributions of dissolved REEs were analyzed in three small streams, in order to determine the extent and occurrence of Gd anomalies. The shale-normalized REE patterns in the three streams were less smooth with heavy REEs higher than light REEs, for a weak reaction of the heavy REE complexes. A negative Ce (cerium) anomaly and positive samarium (Sm) and europium (Eu) anomalies were observed in the three streams and the negative Ce anomaly was affected by the pH of the alkaline rivers. However, a positive Gd anomaly was found in only a typical urban small stream, Jinzhong. With a population of approximately 60,000, Jinzhong runs by a hospital and through wastewater treatment plants (WWTPs). The concentrations of Gd in Jinzhong ranged from 1.54 to 86.65 ng/L with high anthropogenic Gd proportions (63.64%–98.07%). Anthropogenic Gd showed significant seasonal variations and distinct spatial disparities from upstream to downstream, and it was associated with certain ions such as Cl . Anthropogenic Gd could be attributed to gadopentetic acid (Gd-DTPA), which is used in magnetic resonance imaging (MRI) in hospitals. This type of Gd was shown to be correlated with municipal wastewater. Due to the high stability and low particulate reactivity in water, anthropogenic Gd has great potential to serve as a tracer to prove the presence of medical wastewater.
机译：稀土元素（REEs）被称为“工业维生素”，广泛用于医疗，工业，农业等领域。然而，随着对REE需求的增加，过量的REE（例如g（Gd））被认为是微量污染物。环境。在本文中，分析了三个小流中的溶解稀土元素分布，以确定Gd异常的程度和发生。由于重稀土元素络合物的反应较弱，在三个流中的页岩归一化稀土元素分布模式较不光滑，重稀土元素含量高于轻稀土元素。在这三个溪流中观察到负Ce（铈）异常，正sa（Sm）和euro（Eu）异常，并且负Ce异常受到碱性河流pH的影响。但是，仅在典型的城市小溪晋中发现了正Gd异常。晋中市人口约60,000，由一家医院和污水处理厂（WWTP）运营。晋中的Gd浓度在1.54至86.65 ng / L之间，人为的Gd比例较高（63.64％–98.07％）。人为的Gd表现出明显的季节变化和从上游到下游的明显空间差异，并且与某些离子（例如Cl）有关。人为导致的Gd可能归因于g戊酸（Gd-DTPA），其在医院的磁共振成像（MRI）中使用。已表明这种类型的Gd与城市废水有关。由于在水中的高稳定性和低颗粒反应性，人为的G具有作为示踪剂证明医疗废水存在的巨大潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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