Rapid and on-site simultaneous electrochemical detection of copper, lead and mercury in the Amazon river
Rapid and on-site simultaneous electrochemical detection of copper, lead and mercury in the Amazon river
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DOI：
10.1016/j.snb.2019.127620
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发表时间：
2020-03-15
影响因子：
8.4
通讯作者：
Di Lorenzo, Mirella
中科院分区：
文献类型：
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作者：
Bernalte, Elena;Arevalo, Sebastian;Di Lorenzo, Mirella
在世界上贫穷和偏远地区，如亚马逊地区，由于缺乏分析基础设施，无法对供水系统进行定期质量评估。因此，获得负担得起、便携和可靠的实时和现场水监测分析技术是保护脆弱社区和环境的关键。在这种情况下，我们已经开发并成功地实施了一种电化学方法，用于快速（60秒）和有效的同时电化学检测水中的重金属离子（Pb 2+，Cu 2+和Hg 2+）的关注，与一个单一的丝网印刷电极探针。特别是，我们显示了广泛的量化范围为每种污染物（5-300 μ g L-1），和检测限低于环境保护局（EPA）的最大污染物水平的饮用水：0.015，1.3和0.002毫克L-1铅，铜和汞2+，分别。电化学传感器在亚马逊河偏远地区的高温和高湿度条件下进行了测试，这些地区受到采矿相关重金属污染的严重影响。现场测量验证标准的实验室为基础的分析方法，表现出良好的协议。我们的方法可以导致一个负担得起的和便携式的诊断工具，在偏远地区的重金属污染的快速和现场监测。
In poor and remote zones of the world, such as the Amazon region, the lack of analytical infrastructures prevents regular quality assessments of water systems. The access to affordable, portable and robust analytical technologies for real-time and on-site water monitoring is, therefore, key to safeguard vulnerable communities and the environment. In this context, we have developed and successfully implemented an electrochemical methodology for the rapid (60 s) and effective simultaneous electrochemical detection of heavy metal ions of concern (Pb2+, Cu2+ and Hg2+) in water, with a single screen-printed electrode probe. In particular, we show a wide quantification range for each pollutant (5-300 mu g L-1), and detection limits below the Environmental Protection Agency (EPA) maximum contaminant levels for drinking water: 0.015, 1.3 and 0.002 mg L-1 for Pb2+, Cu2+ and Hg2+, respectively. The electrochemical sensors were tested in high temperature and humidity conditions in remote areas of the Amazon river, highly affected by mining-related heavy metal pollution. The field measurements were validated against standard lab-based analytical methods, showing excellent agreement. Our methodology can lead to an affordable and portable diagnostic tool for rapid and on-site monitoring of heavy metals pollution in remote areas.