Bober Beata, Pudas Krzysztof, Lechowski Zbigniew, Bialczyk Jan
Department of Plant Physiology and Development, Jagiellonian University, Kraków, Poland.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2008 Feb;43(2):186-90. doi: 10.1080/10934520701781582.
In this study the effectiveness and feasibility of the degradation of microcystin-LR (MC-LR) using a combined method ozone/Fenton reagent was investigated. The decomposition of the toxin was determined by the chromatographic technique. The effect of the Fenton reaction on the ozonation was observed at various concentrations of ozone at pH 3.0 and 6.8. A low concentration of ozone (0.01 mg/L) given simultaneously with Fenton reagent was more effective in MC-LR degradation than ozone or Fenton reagent treatment individually regardless of the pH. At higher concentrations of ozone the use together with Fenton reagent at pH 6.8 was less efficient in MC-LR degradation than treatment with ozone alone, whereas at pH 3.0 Fenton process turned out to be more effective. The mixture of ozone and hydrogen peroxide was more striking than using ozone with Fenton reagent regardless of the pH. The complete degradation of MC-LR was achieved using ozone alone at a concentration of 0.10 mg/L, whereas the same result using ozonation with Fenton reagent required a dose of ozone of 0.20 mg/L at pH 6.8. In acidic pH the total removal of MC-LR was achieved using ozone alone at a concentration of 0.20 mg/L and the same result was obtained for the combined method of ozone/Fenton reagent.
本研究考察了臭氧/芬顿试剂联合法降解微囊藻毒素-LR（MC-LR）的有效性和可行性。采用色谱技术测定毒素的分解情况。在pH值为3.0和6.8时，观察了不同臭氧浓度下芬顿反应对臭氧化的影响。无论pH值如何，与芬顿试剂同时使用低浓度臭氧（0.01 mg/L）在降解MC-LR方面比单独使用臭氧或芬顿试剂处理更有效。在较高臭氧浓度下，在pH值为6.8时与芬顿试剂一起使用在降解MC-LR方面比单独使用臭氧处理效率低，而在pH值为3.0时芬顿法更有效。无论pH值如何，臭氧和过氧化氢的混合物比臭氧与芬顿试剂一起使用更显著。单独使用浓度为0.10 mg/L的臭氧可实现MC-LR的完全降解，而在pH值为6.8时，使用臭氧与芬顿试剂联合法达到相同结果则需要0.20 mg/L的臭氧剂量。在酸性pH值下，单独使用浓度为0.20 mg/L的臭氧可实现MC-LR的完全去除，臭氧/芬顿试剂联合法也可获得相同结果。
