相关实验视频

Updated: May 30, 2026

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

Published on: July 9, 2012

众包公民在佛罗里达州的饮用水中进行州范围的和多基物质 (PFAS) 地图绘制

Thomas D Sinkway¹, Qaim Mehdi², Emily K Griffin²

¹Department of Chemistry, College of Liberal Arts and Sciences, University of Florida, Gainesville, FL 32611, United States.

The Science of the total environment

|March 24, 2024

概括

在佛罗里达州的饮用水中检测到Per-和多基物质 (PFAS),其含量在地理位置上有所不同. 这项研究为所有67个县监测和减轻这些持久化学品提供了关键的基线数据.

科学领域:

环境化学环境化学
公共卫生公共卫生
分析化学分析化学

背景情况:

和多醇基物质 (PFAS) 是持久性,移动性和无处不在的化学物质,与有害健康影响有关.
饮用水是人类暴露于PFAS的主要矩阵,因为它们在水源中普遍存在.
佛罗里达州依赖各种水源,因此需要了解佛罗里达州内的PFAS污染情况.

研究的目的:

调查佛罗里达州所有67个县的饮用水中31种PFAS的存在和度.
为了确定佛罗里达州各种饮用水源 (井,自来水,瓶装) 的基线PFAS水平.
确定PFAS污染的地理热点,以进行有针对性的监测和减缓工作.

主要方法:

从佛罗里达州各地的公民科学家收集了448个饮用水样本.
使用同位素稀释和超高性能液体染色学 - 双重质谱法 (UHPLC-MS/MS) 分析31种PFAS.
全州PFAS度 (PFAS) 的地理映射.

主要成果:

在佛罗里达州的饮用水中检测到PFAS,其度从不可检测到219 ng/L不等.
PFAS度的中位数为2.90 ng/L,平均值为14.06 ng/L.
观察到PFAS水平的地理差异,突出了需要进一步调查的领域.

结论:

这项研究提供了佛罗里达州饮用水中PFAS的第一个全面的地理调查.
建立的基线数据对于佛罗里达州未来的环境监测和风险评估至关重要.
让公民科学家参与,提高了社区对水质和潜在解决方案的认识.

关键词:

众包服务 (crowdsourcing) 是一种众包服务.饮用水饮用水饮用水佛罗里达州佛罗里达州佛罗里达州佛罗里达州这是LC-MS/MS.在PFAS中,有很多方法.在全州范围内绘制地图.

更多相关视频

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Published on: September 28, 2022

相关概念视频

Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...