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微囊藻毒素在紫外光下的光降解

Keywords: HPLC,微囊藻毒素,UV,光降解

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Abstract:

利用灭菌灯照射,HPLC法检测,研究了MCRR在紫外光(主要发射波长为254nm)照射下的光降解行为。结果表明,在254nm紫外光下,MCRR的光降解和异构化作用同时发生,整个过程不能用准一级反应动力学方程描述。光照强度是影响反应速率的重要因素,温度对反应速率也有较大影响,光强增加和温度的升高均可加速MCRR降解。当温度为25℃、光强为425μW·cm-2时,MCRR的降解半衰期约为2min。pH对MCRR降解的影响不十分显著,但在偏酸性条件比中性和碱性条件有利于降解。

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