[Degradation of MC-LR by combination of UV/H2O2 process].
The degradation of MC-LR in water by UV/H2O2 process was investigated. The effects of intensity of UV radiation, initial concentration of MC-LR, dosages of H2O2, initial pH value and anions on degradation of MC-LR by UV/H2O2 process were studied. The results show that the removal of MC-LR only by H2O2 is nearly zero, and UV process can degrade MC-LR to a certain extent. However, the degradation efficiency of UV/H2O2 process is much higher than UV and H2O2 process due to the synergetic effect between UV and H2O2. The removal of MC-LR increases with the enhancement of intensity of UV radiation, but decreases gradually with the increase of initial concentration of MC-LR. When the dosages of H2O2 change from 1 mmol/L to 3 mmol/L, the constant of degradation rate rises from 0.0844 to 0.1664. The optimum pH value is 3.13. The added anions have adverse effect on the degradation of MC-LR, especially carbonate and nitrate ions have the biggest influence among the studied anions.
Guo
Jian-Wei
JW
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China. guojianwei11@126.com
Gao
Nai-Yun
NY
Yin
Di-Di
DD
Li
Lei
L
Dong
Bing-Zhi
BZ
Zhang
Ke-Jia
KJ
D006861:Hydrogen Peroxide / Q000737:chemistry*; D008387:Marine Toxins; D052998:Microcystins / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D010084:Oxidation-Reduction / Q000528:radiation effects; D010777:Photochemistry; D014466:Ultraviolet Rays; D014873:Water Pollutants / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
D008387:Marine Toxins; D052998:Microcystins; D014873:Water Pollutants; D006861:Hydrogen Peroxide; C057862:cyanoginosin LR