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双功能电抗滤波器,可同时进行 Sb(III)氧化和固存
Chapters
Summary December 5th, 2019
Please note that all translations are automatically generated.
Click here for the English version.
介绍了由碳纳米管和钛酸纳米线组成的双功能电活性滤波器的合理设计方案,并介绍了其在Sb(III)氧化和固存中的环境应用。
Transcript
对从地表水中去除新出现的污染物进行去除的要求很高。最丰富的三类和五号,三号的毒物比五号多10倍。氧化沉淀策略通常采用两步氧化沉淀策略,即氧化三至三先氧化,然后是化学沉淀。
但是,我们可以在一个单位内实现这一点。由于砷与同一氮组的其他元素(如砷或磷)具有相似的物理化学性质,我相信这种方法也可以扩展到这些化合物中。请务必仔细阅读所有化学品的 SDS。
请仔细遵循协议和现有说明,了解如何区分三和五。协议的细微更改可能会导致系统性能发生重大更改。例如,太多的钛酸盐可能会阻止您的电导率和三去除过滤器的动力学。
为了准备钛酸盐纳米线,首先在100毫升的去离子水中溶解56克氢氧化钾,在剧烈搅拌下。接下来在溶液中加入3克二氧化钛粉。进入特氟隆内衬反应器的解决方案入口。
将溶液在 200 摄氏度下保持 24 小时。在洗涤产生的白色沉淀物之前,每升液压酸和去离子水为0.1摩尔,直到获得中性富利pH。在60摄氏度的真空下将产品干燥过夜。
然后将产品转移到管炉中,将材料加热到 600 摄氏度 2 小时,每分钟的斜坡速率为 1 摄氏度。对于钛酸盐CNT过滤器制备,将20毫克CNT加入40毫升的N-甲基丙酮中,并探针对混合物进行40分钟的声波化,以获得均匀溶液。接下来,将200毫克的钛酸盐纳米线加入20毫升甲基丙酮,并探针20分钟。
在声波化结束时,将钛酸盐分散溶液与 CNT 分散溶液混合,将产生的混合物过滤到 PTFE 膜上。然后用100毫升乙醇冲洗过滤器一次,用200毫升去离子水冲洗一次。对于电化学防毒过滤,首先在1000毫升去离子水中加入2.2毫克的三氢钾,然后向150毫升的烧杯中加入100毫升的800微克每升氧化铝溶液。
将溶液调整为 pH 7,将准备好的钛酸盐 CNT 滤波阳极放入电化学改性聚碳酸酯过滤套管中。将单一 CNT 过滤器作为阴极放入外壳中,用穿孔钛环连接阳极和阴极。使用绝缘硅橡胶分离和密封外壳,并在过滤过程中使用直流电源以适当的流速通过过滤系统,施加正确的电压。
在过滤结束时,使用原子荧光光谱仪根据标准方案确定总的三浓度。电活性过滤装置是一种电化学改性聚碳酸酯过滤外壳。钛酸CNT滤波器的场发射扫描电子显微镜图像表明表面粗糙。
透射电子显微镜表征表明,CNT的加工后与钛酸盐纳米线缠绕,表明钛酸盐-CNT混合材料的合成成功。为了证明电化学过滤系统的有效性,可以确定电化学过滤系统的总值变化和抗价状态作为时间函数。例如,在此代表性分析中,五号浓度在最初 30 分钟内急剧上升。
在再循环模式下,经过1个多小时的连续过滤,观察到了完整的三次转化,表明三氧化是初始阶段的主要反应过程,使五号氧化剂被装载的钛纳米线有效吸收。此外,由于静电相互作用增强,并且通过电迁移接近表面传输,由于施加的电压,具有抗腐蚀感动力学和容量。该协议致力于通过集成复杂的任务、膜科学和电化学来消除水中的三个和类似成分的污染,提供一个有希望的策略。
使用制造的过滤器作为阴极过滤系统在功能或减少和吸收可以证明。允许其他重金属离子的净化,如铬六。下一步,我们计划研究天然有机材料对三去除性能的影响,并致力于开发实验室功能,以实现改进的动力学。
有些化学物质是有毒的、腐蚀性的或刺激物。使用时,请务必佩戴适当的个人防护设备。
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