活性炭去除饮用水突发性污染桔霉素的研究

本文研究不同浓度桔霉素对饮用水p H值、折射率、电导率、旋光性变化的影响以及探讨活性炭对饮用水中可能发生的突发性污染物桔霉素的去除工艺效果,为饮用水突发安全事件应急处理提供技术支撑。桔霉素在1 mg/L~50 mg/L范围内,饮用水p H显著下降,折射率呈线性增大。桔霉素在0.1 mg/L~10 mg/L范围内,饮用水电导率显著增强,但桔霉素没有旋光性。桔霉素对p H、折射率、电导率影响情况可作为饮用水中桔霉素污染与否的参考指标。两种形态的活性炭比较试验结果,粉末活性炭去除桔霉素的效果优于颗粒活性炭。粉末活性炭去除饮用水中桔霉素突发性污染的最优工艺参数为:活性炭添加量0.8 g/L,时间5 min,去除率达到109.86%。粉末活性炭去除桔霉素快速高效,可用于饮用水桔霉素突发性污染事件的快速应急处理。

Removal of Citrinin from Drinking Water by Powdered Activated Carbon in Emergency Pollution Incidents

The impact of different citrinin concentrations on pH, refractive index, conductivity and optical activity of drinking water was investigated. Additionally, the effect of activated carbon on removal of citrinin contamination from polluted drinking water was studied to provide technical support during emergency pollution incidences. The results showed that when the concentration of citrinin was in the range of 1 to 50 mg/L, pH of drinking water declined significantly, while the refractive index increased linearly. Conductivity increased significantly between 0.1 and 10 mg/L of citrinin, but no optical activity was observed. The impact of citrinin on pH, refractive index, and conductivity can be used as indicators for monitoring drinking water for contamination by citrinin. Comparison of two types of activated carbon showed that the powdered form removed citrinin more effectively than the granular one. The optimal conditions for removal of citrinin from drinking water included 0.8 g/L powdered, activated carbon and 5-min duration of treatment, resulting in 109.86% removal efficiency. Powdered, activated carbon removed citrinin rapidly and efficiently. Therefore, it has potential for use during emergency pollution incidents wherein drinking water is contaminated by citrinin.