Impact of seawater salinity on the sonochemical removal of emerging organic pollutants
Impact of seawater salinity on the sonochemical removal of emerging organic pollutants
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DOI：
10.1080/09593330.2018.1564071
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发表时间：
2020-08-10
影响因子：
2.8
通讯作者：
Merouani, Slimane
中科院分区：
文献类型：
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作者：
Hamdaoui, Oualid;Merouani, Slimane
在这项研究中提出的结果说明了多个角色的海水盐度对声化学降解，在可变的频率（300-1700 kHz），几种有害物质，如对羟基苯甲酸丙酯（PPR）内分泌干扰物和几种合成染料：萘酚蓝黑（NBB）、孔雀石绿色（MG）、碱性红29（BR 29）、酸性橙子7（AO 7）、罗丹明B（RhB）和碱性品红（BF）。声化学处理降解所有污染物在海水中的速度比在去离子水。海水-盐通过增加溶液的离子强度而作为亲水性污染物朝向空化气泡的反应界面区域的潜在推动器。另外，盐减少气泡聚结，这在照射介质中产生更高数量的活性气泡。采用基于Langmuir动力学机理的两种非均相模型对PPR和NBB的降解速率进行了分析，结果表明气泡界面区是海水中PPR和NBB超声降解的优先反应区。
The results presented in this study illustrate the multiple roles of seawater salinity toward the sonochemical degradation, at variable frequencies (300-1700 kHz), of several hazardous substances, i.e. propylparaben (PPR) endocrine disruptor and several synthetic dyes: naphthol blue black (NBB), malachite green (MG), basic red 29 (BR29), acid orange 7 (AO7), Rhodamine B (RhB) and basic fuchsin (BF). Sonochemical treatment degraded all pollutants in seawater at faster rates than in deionized water. The seawater-salts through increasing the ionic strength of the solution act as a potential pusher of hydrophilic pollutants toward the reactive interfacial area of cavitation bubbles. Additionally, the salts reduce the bubble coalescence, which yields higher number of active bubbles in the irradiating media. Analysing the degradation rate of PPR and NBB with two heterogeneous models based on Langmuir kinetics mechanism indicated that the bubble interfacial area was the preferred reaction zone for the ultrasonic degradation of PPR and NBB in seawater.