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lovelva3000银虫 (小有名气)
揭露高校科研黑幕
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翻译一篇文献的结论部分【3月31日前】
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就翻译一下结论部分就行了 4. Conclusions It has been demonstrated that anodic oxidation, electro-Fenton and photoelectro-Fenton with a BDD anode are viable methods to decontaminate acidic wastewaters containing 2,4-DP. These electrochemical techniques yield overall mineralization at high current due to the great production of oxidant BDD(OH) favoring the destruction of final carboxylic acids. OH formed from Fenton’s reaction (3) destroys more rapidly aromatic products, thus making the electro-Fenton and photoelectro-Fenton processes much more efficient than anodic oxidation. UVA light in photoelectro-Fenton with BDD has little in?uence on the degradation rate of pollutants. The alternative use of a Ptanode in the same methods under comparable conditions leads to slower decontamination because of the lower oxidizing power of Pt(OH). The increase in current accelerates the degradation of all pollutants, but with the consumption of more speci?c charge. The initial chlorine is released as Cl2, which is stable in the treatments with Pt and oxidized to Cl2 at the BDD anode. The 2,4-DP decay always follows a pseudo-?rst-order kinetics. Chlorohydroquinone and chloro-p-benzoquinone are detected as aromatic intermediates and maleic, fumaric, malic, lactic, pyruvic, acetic, formic and oxalic acids are identi?ed as carboxylic acids. Acetic acid is destroyed by the oxidant BDD(OH), but not by Pt(OH). Oxalic acid and Fe3+ -oxa-lato complexes are also converted into CO2 by BDD(OH), whereas the latter complexes are simultaneously photodecarboxylated under UVA irradiation in photoelectro-Fenton. |
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rachel-oy
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lovelva3000(金币+10,VIP+0):谢谢 3-10 23:14
lovelva3000(金币+10,VIP+0):谢谢 3-10 23:14
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阳极氧化，电芬顿和具有BDD阳极的光电子芬顿用来证明酸性废水中含义2，4-DP是可以的。由于大量氧化BDD（OH）产物破坏了最终的羧酸，这些光电学技术变得矿化。芬顿反应3中形成的OH能更快速的破坏芳香产物，因此使得电芬顿和光电芬顿比阳极氧化更有效。具有BDD的光电芬顿中的长波紫外光对于污染物的降解影响更小。因为Pt（OH）具有更低的氧化性，在相同的情况下，使用Pt阳极净化效果更慢。电流的增长加速污染物的降解，但是导致更多的speci?c 消耗。在Pt处理方法中氯是稳定存在的，而在BDD阳极中，最初的氯以氯气形式释放。2,4-DP 的降解遵循pseudo-?rst-order 动力学规律。发现了对苯二酚和p-氯苯醌马来酸，和具有羧酸的反丁烯二酸，苹果酸，乳酸，丙酮酸，醋酸，蚁酸和草酸。蚁酸被BDD（OH）氧化后遭到破坏，而不是Pt（OH）。草酸和Fe3+ -oxa-lato复合物也被BDD（OH）转换为CO2，而且后来的复合物在光电芬顿的紫外线照射下发生脱羧反应。 尽力了~~ |
2楼2009-03-09 15:55:17