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首页> 外文期刊>The Journal of automatic chemistry >Trace Metal Detection in Aqueous Reservoirs Using Stilbene Intercalated Layered Rare-Earth Hydroxide Tablets
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Trace Metal Detection in Aqueous Reservoirs Using Stilbene Intercalated Layered Rare-Earth Hydroxide Tablets

机译：使用斯蒂烯插入层状稀土氢氧化物片剂的水储层中痕量金属检测

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Contamination of aquatic reservoirs with metal ions is a slow gradual process that is not easy to detect. Consequences of the metal ions, especially the ones with high atomic numbers (heavy metals) at high concentrations, are severe and irreversible in aquatic reservoirs. As such, early detection mechanisms, especially at trace concentration, are essential for mitigation measures. In this work, a new, robust, and effective tool for trace metal detection and monitoring in aqueous solutions has been developed. Tablets (1?mm thick and similar to medicinal tablets) were manufactured from a powder comprising stilbene intercalated into gallery spaces of lanthanide-containing layered double hydroxides. The tablets were placed in a water column having different concentrations of Pb~(2+) and Cu~(2+) ions, and the water was allowed to flow for 45 minutes at a flow rate of 100?ml/s. Thereafter, the tablets were dried and made to powder, and their phosphorescence was measured. The gradual stilbene phosphorescence turnoff in the tablets from various concentrations of metal ions was correlated with sorption amounts. The tablets were able to detect effectively metal ions (up to Pb~(2+) 1.0?mmol/L and Cu~(2+) 5.0?mmol/L) in the aqueous media. As such, the concentrations of Pb~(2+) and Cu~(2+) ions at trace levels were determined in the test solutions. This method provides a real-time metal ion analysis and does not involve sampling of water samples for analysis in the laboratory.
机译：金属离子的水生水库污染是一种缓慢的渐进过程，不易检测。金属离子的后果，尤其是高浓度高浓度（重金属）的后果，在水产储层中严重和不可逆转。因此，早期检测机制，尤其是痕量浓度，对缓解措施至关重要。在这项工作中，已经开发出一种新的，坚固，有效的痕量金属检测和水溶液监测工具。从包含硅藻土嵌入到含镧系层的双氢氧化物的泳道空间中的粉末制成片剂（1毫米厚的药片）。将片剂置于具有不同浓度的Pb〜（2+）和Cu〜（2+）离子的水柱中，并使水以100μl/ s的流速流动45分钟。此后，将片剂干燥并制成粉末，并测量它们的磷光。从各种浓度的金属离子中逐渐脱脂磷光差交与吸附量相关。片剂能够在水性介质中有效地检测有效的金属离子（高达Pb〜（2+）1.0×mmol / L和Cu〜（2+）5.0？mmol / l）。因此，在试验溶液中测定痕量水平的Pb〜（2+）和Cu〜（2+）离子的浓度。该方法提供了实时金属离子分析，并且不涉及水样的采样进行实验室分析。

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