Photo-Fenton process as an efficient alternative to the treatment of landfill leachates.
Photo-Fenton process as an efficient alternative to the treatment of landfill leachates.
复制标题
DOI：
10.1016/j.jhazmat.2007.09.053
复制
发表时间：
2008-05
影响因子：
13.6
通讯作者：
Oscar Primo;M. Rivero;I. Ortiz
中科院分区：
文献类型：
--
作者：
Oscar Primo;M. Rivero;I. Ortiz
研究了光-芬顿、类芬顿、芬顿和UV/H2 O2等高级氧化工艺对垃圾渗滤液中有机物和色度的去除效果。渗滤液的特点是高COD，低生物降解性和强烈的深色。COD去除率作为操作变量（H2 O2、Fe 2+、Cu 2+、UV）的函数的评估导致结果在30%和77%之间，并且观察到去除效率按以下顺序降低：光-芬顿>类芬顿>芬顿>UV/H2 O2>UV。因此，进行详细的实验分析以分析过氧化氢和铁浓度以及光芬顿法中试剂添加次数的影响，观察到：（i）取决于H2 O2剂量，COD去除率在49%至78%的范围内，（ii）通过在多个步骤中添加试剂，去除的有机物的总量增加（86%），（iii）发现对应于Fe 2 +/COD质量比=0.33的铁浓度是最有利的，（iv）中和步骤后，最终浸出液中铁和H2 O2的颜色和残留浓度几乎可以忽略不计。
Advanced oxidation processes (AOPs), namely photo-Fenton, Fenton-like, Fenton and UV/H2O2, have been investigated in the removal of organic matter and colour from landfill leachates. The leachate was characterised by high COD, low biodegradability and intense dark colour. Evaluation of COD removal as a function of the operation variables (H2O2, Fe2+, Cu2+, UV) led to results that ranged between 30% and 77% and it was observed that the removal efficiencies decreased in the order: photo-Fenton>Fenton-like>Fenton>UV/H2O2>UV. Thus, a detailed experimental analysis was carried out to analyse the effect of the hydrogen peroxide and iron concentrations and the number of reagent additions in the photo-Fenton process, observing that: (i) the COD removal ranged from 49% to 78% depending on the H2O2dose, (ii) the total amount of organic matter removed was increased by adding the reagent in multiple steps (86%), (iii) iron concentration corresponding to a Fe2+/COD mass ratio=0.33 was found to be the most favourable and, (iv) after a neutralization step, the colour and residual concentrations of iron and H2O2were practically negligible in the final leachate solution.