Degradation of PFOA with a nanosecond‐pulsed plasma gas–liquid flowing film reactor
Degradation of PFOA with a nanosecond‐pulsed plasma gas–liquid flowing film reactor
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DOI：
10.1002/ppap.202000074
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发表时间：
2020-05
影响因子：
3.5
通讯作者：
R. Bulusu;R. Wandell;Zhiming Zhang;M. Farahani;Youneng Tang;B. Locke
中科院分区：
文献类型：
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作者：
R. Bulusu;R. Wandell;Zhiming Zhang;M. Farahani;Youneng Tang;B. Locke
利用具有纳秒脉冲电源的连续气液流动膜反应器来降解全氟辛酸（PFOA），通过氟化物（F - ）的形成来评估。将 50 mg/L 的 PFOA 溶解在去离子水中，并以 2 mL/min 的速度使用氩气作为载气。使用离子色谱法分析液相的氟化物(F - )。使用恒定的 16 kV 输入电压和 40 ns 脉冲宽度，电源脉冲频率 (f) 在 0.25 kHz 和 10 kHz 之间变化。最高的 F 生成速率 ( N F- ) 为 1.57 × 10 -8 mol/s，发生在 5 kHz 处；最高的 F - 生成效率 (EY F- ) 为 9.12 × 10 -9 mol/J，出现在 0.25 kHz 处。图解摘要 全氟辛酸 (PFOA) 的降解通过使用纳秒脉冲电源在连续气液反应器中形成的氟化物 (F - ) 进行评估，输入电压恒定，脉冲宽度分别为 16 kV 和 40 ns，频率变化为 0.25 kHz – 10 kHz。 F - 使用离子色谱法测量。使用 LC/MS 观察到的中间产物是全氟庚酸 (PFHpA) 和全氟己酸 (PFHxA)。
A continuous gas-liquid flowing film reactor with a nanosecond pulsed power supply was utilized for the degradation of perfluorooctanoic acid (PFOA) as assessed by fluoride (F - ) formation. PFOA, 50 mg/L, dissolved in deionized water was supplied at 2 mL/min with argon carrier gas. The liquid phase was analyzed for fluoride (F - ) using ion chromatography. The power supply pulse frequency ( f ) was varied between 0.25 kHz and 10 kHz using constant 16 kV input voltage and 40 ns pulse width. The highest F production rate ( N F- ), 1.57 × 10 -8 mol/s, occurred at 5 kHz while the highest efficiency of F - production ( EY F- ), 9.12 × 10 -9 mol/J, was found at 0.25 kHz. Graphical abstract Degradation of perflurorooctanoic acid (PFOA) is assessed using fluoride (F - ) formation in a continuous gas-liquid reactor using a nanosecond pulsed power supply, at constant input voltage and pulse width 16 kV and 40 ns respectively and, varying frequency 0.25 kHz – 10 kHz. The F - is measured using ion chromatography. The intermediate products observed using LC/MS are perfluoroheptanoic acid (PFHpA) and perfluorohexanoic acid (PFHxA).