Quantifying Nanoparticle Associated Ti, Ce, Au, and Pd Occurrence in 35 U.S. Surface Waters,ACS ES&T Water

当前位置： X-MOL 学术 › ACS ES&T Water › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Quantifying Nanoparticle Associated Ti, Ce, Au, and Pd Occurrence in 35 U.S. Surface Waters
ACS ES&T Water ( IF 4.8 ) Pub Date : 2021-09-17 , DOI: 10.1021/acsestwater.1c00206
Logan N. Rand _{1,

2} , Kenneth Flores _{1,

3} , Naushita Sharma _{1,

2} , Jorge Gardea-Torresdey _{1,

3} , Paul Westerhoff _{1,

2}

Affiliation

Mass flux models have predicted environmental concentrations of released engineered nanoparticles (ENPs), but their validation with field studies at high geographic scale has been limited. Additionally, baseline levels of natural and incidental nanoparticle (NP) occurrence are not well-established. This study begins to address these knowledge gaps by investigating the Au, Ce, Ti, and Pd NP content of 241 water samples from 35 drinking water sources across the U.S. over 6–9 months using single particle inductively coupled plasma-mass spectrometry. Ce and Ti NPs were commonly detected, with Ce concentrations (0.3–230 μg L^–1) exceeding both ENP predictions and reports of natural abundance. The Ti NP concentrations (3–2400 μg L^–1) were greater than modeled ENP release and similar to the expected natural abundance. Although Au and Pd NPs were rarely detected, they were present at parts per billion levels in some samples. The NP concentrations and sizes did not differ between geographic regions but were highly variable at individual sites over time, suggesting that local changes to release rates and precipitation may cause temporary hot spots. The regional NP concentrations and sizes provided here will be useful to inform continued ENP release and risk assessment studies.

中文翻译：

量化美国 35 个地表水中与纳米粒子相关的 Ti、Ce、Au 和 Pd 的含量

质量通量模型已经预测了释放的工程纳米粒子 (ENP) 的环境浓度，但它们在高地理范围的实地研究中的验证受到限制。此外，自然和偶然出现的纳米粒子 (NP) 的基线水平尚未确定。本研究通过使用单粒子电感耦合等离子体质谱法在 6-9 个月内调查了来自美国 35 个饮用水源的 241 个水样的 Au、Ce、Ti 和 Pd NP 含量，开始解决这些知识空白。通常检测到 Ce 和 Ti NPs，Ce 浓度（0.3-230 μg L ^–1）超过了 ENP 预测和自然丰度报告。Ti NP 浓度 (3–2400 μg L ^–1) 大于模拟的 ENP 释放并且与预期的自然丰度相似。尽管很少检测到 Au 和 Pd NP，但它们在某些样品中的含量为十亿分之几。NP 浓度和大小在地理区域之间没有差异，但随着时间的推移在个别地点变化很大，这表明释放率和降水的局部变化可能会导致暂时的热点。此处提供的区域 NP 浓度和大小将有助于为持续的 ENP 释放和风险评估研究提供信息。

更新日期：2021-10-08

点击分享查看原文

点击收藏

阅读更多本刊最新论文