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首页> 外文期刊>RSC Advances >Degradation of 2,4-dichlorophenol from aqueous using UV activated persulfate: kinetic and toxicity investigation
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Degradation of 2,4-dichlorophenol from aqueous using UV activated persulfate: kinetic and toxicity investigation

机译：使用UV活化过硫酸盐水溶液从水性降解2,4-二氯苯醇：动力学和毒性调查

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摘要

2,4-DCP is a high-toxicity phenol compound, which is difficult to remove, harmful to the health of people and seriously influences the aquatic ecosystems. In this study, the degradation of 2,4-DCP using UV/persulfate (UV/PS) process was investigated for the first time. The results showed pseudo-first-order rate constants of 2,4-DCP photo-degradation by UV/PS was 35.1 × 10 ~(?3) min ~(?1) . The reaction rate constants increased with pH increasing from 5 to 7 and then decreased at pH 8. Different anions (Cl ~(?) , HCO _(3) ~(?) and NO _(3) ~(?) ) in water presented different effects on the photo-degradation reaction. The photo-degradation rates of 2,4-DCP in three actual water conditions (Xidong water works, Xijiu reservoir, Henshan reservoir) were higher than in the ultrapure water. Two possible (hydroxylated and dechlorinated) pathways for the degradation of 2,4-DCP by UV/PS were proposed. The luminescent bacteria inhibition rate greatly decreased with the concentration of 2,4-DCP decreasing in the reaction process.
机译：2,4-DCP是一种高毒性酚化合物，难以去除，对人的健康有害，严重影响水生生态系统。在该研究中，首次研究了使用UV /过硫酸盐（UV / PS）方法的2,4-DCP的降解。结果表明，UV / PS的2,4-DCP光降解的伪一阶常数为35.1×10〜（？3）分钟〜（？1）。反应速度常数随pH从5-7增加而增加，然后在pH8的pH8下降。不同的阴离子（Cl〜（α），HCO _（3）〜（α），没有_（3）〜（？））对光降解反应提出了不同的影响。 2,4-DCP在三种实际水条件下的光降解率（西贡水工程，西贡水库，汉山水库）高于超纯水。提出了通过UV / PS降解2,4-DCP的两种可能的（羟基化和脱氯化）途径。在反应过程中，发光细菌抑制率大大降低了2,4-DCP浓度。

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