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Chemically and thermally activated persulfate for theophylline degradation and application to pharmaceutical factory effluent

机译：化学和热活化过硫酸盐用于茶碱的降解及其在制药厂废水中的应用

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Degradation of PPCPs by AOPs has gained major interest in the past decade. In this work, theophylline (TP) oxidation was studied in thermally (TAP) and chemically (CAP) activated persulfate systems, separately and in combination (TCAP). For [TP] _(0) = 10 mg L ~(?1) , (i) TAP resulted in 60% TP degradation at [PS] _(0) = 5 mM and T = 60 °C after 60 min of reaction and (ii) CAP showed slight degradation at room temperature; however, (iii) TCAP resulted in complete TP degradation for [PS] _(0) = [Fe ~(2+) ] _(0) = 2 mM at T = 60 °C following a pseudo-first order reaction rate with calculated k _(obs) = 5.6 (±0.4) × 10 ~(?2) min ~(?1) . In the TCAP system, the [PS] _(0) ?:?[Fe ~(2+) ] _(0) ratio of 1?:?1 presented the best results. A positive correlation was obtained between the TP degradation rate and increasing temperature and [PS] _(0) , and a negative correlation was obtained with increasing pH. Both chloride and humic acid inhibited the degradation process, while nitrates enhanced it. TP dissolved in spring, sea and waste water simulating real effluents showed lower degradation rates than in DI water. Waste water caused the highest inhibition ( k _(obs) = 2.6 (±0.6) × 10 ~(?4) min ~(?1) ). Finally, the TCAP system was tested on a real factory effluent highly charged with TP, e.g. [TP] _(0) = 160 mg L ~(?1) , with successful degradation under the conditions of 60 °C and [PS] _(0) = [Fe ~(2+) ] _(0) = 50 mM.
机译：在过去的十年中，AOP对PPCP的降解引起了人们的极大兴趣。在这项工作中，茶碱（TP）的氧化分别在热（TAP）和化学（CAP）活化的过硫酸盐体系中进行了研究，分别进行了研究（TCAP）。对于[TP] _（0）= 10 mg L〜（？1），（i）TAP在反应60分钟后[PS] _（0）= 5 mM和T = 60°C时导致TP降解60％ （ii）CAP在室温下显示轻微降解;但是（iii）TCAP导致[PS] _（0）= [Fe〜（2+）] _（0）= 2 mM在T = 60°C时完全TP降解，遵循伪一级反应速率，计算的k_（obs）＝ 5.6（±0.4）×10〜（？2）min〜（？1）。在TCAP系统中，[PS] _（0）∶∶ [[Fe〜（2+）] _（0）的比率为1 ∶∶1表现出最好的结果。 TP降解速率与温度升高和[PS] _（0）之间呈正相关，而与pH升高之间呈负相关。氯化物和腐殖酸均抑制降解过程，而硝酸盐则增强降解过程。溶解在模拟真实废水的春季，海水和废水中的TP的降解率低于去离子水中的降解率。废水的抑制作用最大（k _（obs）= 2.6（±0.6）×10〜（？4）min〜（？1））。最后，TCAP系统在富含TP的真实工厂废水中进行了测试，例如[TP] _（0）= 160 mg L〜（？1），在60°C和[PS] _（0）= [Fe〜（2+）] _（0）= 50的条件下成功降解毫米

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