International Journal of Environmental Research ( IF 2.6 ) Pub Date : 2021-08-27 , DOI: 10.1007/s41742-021-00361-x Helena Nourizadeh 1 , Fereshteh Rashchi 1 , Mehdi Noori 2 , Mohamad Mirazimi 3 , Amir Masoud Badkoobehhezaveh 4
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Abstract
The toxic vanadium (V) compounds of oil fly ash produced by power plants worldwide are posing a broad spectrum of many health threats and environmental hazards. Here, we use alkaline leaching and a simple two-step precipitation method to recycle vanadium from this industrial waste into nanostructured vanadium pentoxide (V2O5) for ethanol-sensing applications. The recovery of vanadium from the fly ash is maximized by applying the design of experiments based on the response surface methodology (RSM) to the fly ash leaching process. Containing small amounts of impurities such as Si, Al, Fe, and Ni, the recovered V2O5 shows up to 60% higher sensitivity toward ethanol than pure V2O5. Hence, the vanadium content of oil fly ash can be recycled into a product that holds great potential as a low-temperature ethanol sensor. This strategy not only helps mitigate the adverse effects of the landfill of the fly ash but also reduces the need for natural resources.
Graphic Abstract
中文翻译：
从油粉煤灰中回收纳米结构五氧化二钒的表征和乙醇传感行为
摘要
世界范围内的发电厂产生的油飞灰中的有毒钒 (V) 化合物正在构成广泛的许多健康威胁和环境危害。在这里，我们使用碱浸和简单的两步沉淀法将这种工业废物中的钒回收成纳米结构的五氧化二钒 (V 2 O 5 )，用于乙醇传感应用。通过将基于响应面方法 (RSM) 的实验设计应用于飞灰浸出过程，可以最大限度地从飞灰中回收钒。含有少量杂质，如 Si、Al、Fe 和 Ni，回收的 V 2 O 5对乙醇的灵敏度比纯 V 2 O 5高 60%. 因此，油粉煤灰中的钒含量可以回收成具有作为低温乙醇传感器的巨大潜力的产品。这种策略不仅有助于减轻粉煤灰填埋的不利影响，而且还减少了对自然资源的需求。
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