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Combating fuel-driven aqua-pollution using ”benzomagnets“

机译：使用“苯并磁铁”与燃料驱动的水污染作斗争

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Marine environments are frequently exposed to semi-volatile polyaromatic hydrocarbons (PAHs) from anthropogenic sources including the incomplete combustion of fossil fuels or oil spills. Benzo[a]pyrene (BP), one of the most dangerous PAHs, has been found to be the champion killer of marine life due to its potent mutagenicity and carcinogenicity. Herein, we developed a novel porous microsphere comprising a nanohybrid of TiO2 nanoparticles (～20 nm diameter) and a biologically relevant dye (protoporphyrin IX) for the complete removal of BP from aqueous environments. Steady state/picosecond-resolved spectroscopy and high-resolution electron microscopy were used for the structural characterization of the functional microspheres (FMs). The FMs were found to adsorb the dispersed BP with almost cent percent efficiency for several cycles with photo/chemical recharging options. We deposited the FMs onto a stainless steel mesh to fabricate a prototype for future marine application in the real-world removal of pollution. We also designed an assessment strip using the FMs for the rapid onboard monitoring of BP contamination in any aqueous environment, which was found to detect ppm (25 micromolar) and ppt (50 picomolar) levels of BP using absorption and fluorometric assays, respectively.
机译：海洋环境经常暴露于人为来源的半挥发性多芳烃（PAH），包括化石燃料或溢油的不完全燃烧。苯并[ a ] py（BP）是最危险的多环芳烃之一，由于其强大的致突变性和致癌性，已成为海洋生物的头号杀手。本文中，我们开发了一种新型的多孔微球，该纳米球包含TiO 2 纳米杂化物（直径约20 nm）和生物学相关的染料（原卟啉IX），用于完全去除BP来自水性环境。稳态/皮秒分辨光谱和高分辨率电子显微镜用于功能微球（FMs）的结构表征。发现在使用光/化学充电选项的几个循环中，FM以几乎百分之一的效率吸附分散的BP。我们将FM沉积在不锈钢网上，以制造出原型，供将来在现实世界中去除污染的海洋应用中使用。我们还设计了使用FM的评估条，用于在船上监测任何水性环境中的BP污染，从而发现它们分别通过吸收法和荧光法检测到ppm（25微摩尔）和ppt（50皮摩尔）的BP水平。

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