Microcystin-LR degradation by solar photo-Fenton, UV-A/photo-Fenton and UV-C/H2O2: a comparative study

被引：28
|
作者：
de Freitas, Adriane M. [1 ]
Sirtori, Carla [2 ]
Lenz, Cesar A. [3 ]
Peralta Zamora, Patricio G. [4 ]
机构：
[1] Fed Technol Univ Parana UTFPR, Dept Chem & Biol, Curitiba, Parana, Brazil
[2] Fed Univ Latin Amer Integrat UNILA, Foz Do Iguacu, PR, Brazil
[3] Parana Inst Technol TECPAR, Curitiba, Parana, Brazil
[4] Fed Univ Parana UFPR, Dept Chem, Tecnotrater Grp, Curitiba, Parana, Brazil
来源：
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES | 2013年 / 12卷 / 04期
关键词：
ADVANCED OXIDATION PROCESSES; PHOTOCATALYTIC TREATMENT; WATER; REMOVAL; LIGHT; H2O2; MINERALIZATION; METABOLITES; TOXIN;
D O I：
10.1039/c2pp25233c
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
This work assessed the effectiveness of several methods on degradation of microcystin-LR (MC-LR) by different Advanced Oxidation Processes, like solar photo-Fenton, UV-A/photo-Fenton and UV-C/H2O2. UV-C/H2O2 and UV-A/photo-Fenton processes were carried out in a bench scale photochemical apparatus and the solar photo-Fenton treatment was performed in a CPC photoreactor. MC-LR degradation was monitored by LC-ESI-MS/MS and kinetic parameters were calculated for all systems evaluated. The results demonstrated that UV-C/H2O2 was the most efficient method, showing a reduction of over 90% of initial MC-LR after 5 min of reaction. Solar and photo-Fenton/UVA had a rate decrease of 88 and 76% after the same time, respectively. The kinetic study indicated that the solar photo-Fenton and artificial radiation (UV-A) processes were very similar in their efficiency. The use of sunlight instead of artificial UV radiation significantly reduced the cost of photocatalytic treatment systems; it is also an environmentally friendly method, since it utilizes renewable energy.
引用
收藏
页码：696 / 702
页数：7
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