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Aquaculture drug degradation in persulfate by PANI-based microparticles controlled via ultrasonic field: Forced motion of “burning hot micromotors”
Chemosphere ( IF 8.1 ) Pub Date : 2021-02-23 , DOI: 10.1016/j.chemosphere.2021.130098
Qihui Xu , Hong You , Yuhong Jia , Yibo Yu , Haoyang Li

The triphenylmethane derivative malachite green (tpmMaG) despite repeated prohibitions but is frequently detected in aquatic environment and draws emerging attention because of the potential poisonous effects. The polyaniline/persulfate with ultrasound catalysis (US/PANI-PS) was developed for tpmMaG removal. The effects of 12 factors and the optimization by response surface methodology (RSM) for tpmFG removal were evaluated based on the pseudo-first-kinetics (kobs). From free radical inhibition, the ratios of active species in US/PANI-PS (δ11 = 0.355, δ12 = 0.593) were close to that in US-PS (δ21 = 0.346, δ22 = 0.586) and different to that in PANI-PS and PS systems. A possible degradation pathway (hydroxylation, N-demethylation, deamination, and open-benzene ring) was explored by gas chromatography-mass spectrometer (GC/MS) and high performance liquid chromatography-mass spectrometer (HPLC-MS). The designed reactor involving the US-driven PANI was simulated by acoustic-piezoelectric interaction. From cavitation calculations, the estimated effective-mean temperature at bubble-water interface had little increasing (from 704 K to 711 K) after adding the PANI, however, the adsorption capacity of tpmMaG in reactive zone decreased from 0.0891 μM to 0.0787 μM. The mechanism (PANI hot turbo-micromotors) with US/PANI-PS was proposed. The tpmMaG was removed with a low treatment cost of 2.81 $⋅m−3 (the EE/O value 18.29 kWh⋅m−3) by US/PANI-PS, presenting a cost-effective treating process. The reusability tests and characterizations (contact angle, X-ray diffraction (XRD), and scanning electron microscope (SEM)) further confirmed the stability of PANI.



中文翻译:

通过超声场控制的基于PANI的微粒使过硫酸盐中的水产养殖药物降解:“燃烧的热微电机”的强制运动

三苯甲烷衍生物孔雀石绿(tpm MaG)尽管屡禁不止,但在水生环境中经常被发现,并由于潜在的毒性作用而引起人们的关注。开发了具有超声催化作用的聚苯胺/过硫酸盐(US / PANI-PS),用于去除tpm MaG。基于伪第一动力学(k obs)评估了12个因素的影响以及通过响应面方法(RSM)进行的tpm FG去除的优化。从自由基的抑制,活性物种的在US / PANI-PS的比率(δ 11  = 0.355,Δ 12  = 0.593)被接近,在US-PS(δ 21  = 0.346,δ 22 = 0.586),并且与PANI-PS和PS系统中的不同。通过气相色谱-质谱仪(GC / MS)和高效液相色谱-质谱仪(HPLC-MS)探索了可能的降解途径(羟基化,N-脱甲基化,脱氨基和开苯环)。通过声-压电相互作用模拟了由美国驱动的PANI设计的反应堆。从空化计算来看,添加PANI后,气泡-水界面的估计有效平均温度几乎没有增加(从704 K到711 K),但是,反应区内tpm MaG的吸附容量从0.0891μM降低到0.0787μM。提出了带有US / PANI-PS的机构(PANI热涡轮微电机)。去除了tpm MaG,处理成本低至2.81 $⋅mUS / PANI-PS的-3(EE / O值为18.29 kWh·m -3),提出了一种具有成本效益的处理方法。可重用性测试和表征(接触角,X射线衍射(XRD)和扫描电子显微镜(SEM))进一步证实了PANI的稳定性。

更新日期:2021-03-03
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