城市再生水中病毒对浮选过程的影响规律

Effect of virus in reclaimed water on flotation process

为探讨城市再生水回用于浮选工艺的安全性,以再生水模拟浮选试验和实施吸附、解吸试验分析,研究了城市再生水中病毒在浮选过程中的迁移规律。结果表明:再生水中的病毒能够快速被矿物颗粒吸附,尾矿废水继续回用于浮选流程是安全的,但精矿、中矿、尾矿中吸附了大量的病毒,在特定暴露水平下会对从业人员构成健康风险;矿物颗粒对病毒的不可逆吸附或者灭活是影响再生水中病毒在浮选过程迁移的主要因素,随着pH值升高,病毒-矿物颗粒体系作用能障增大,对病毒的吸附呈下降趋势,矿物颗粒对噬菌体MS2的吸附率低于ΦΧ174,矿物颗粒粒径的减小明显提高了矿物颗粒对病毒的吸附。

The transport of viruses （ФX174 and MS2） in reclaimed water in flotation system has been investigated through Simulation of flotation experiment, adsorption experiment and desorption experiment for the safety of reclaimed water reused to flotation. The results showed that viruses in reclaimed water were rapidly adsorbed by ore particles, while tailing waste water could be reused to floatation safely, however, concentrate,middlings and tailings could pose health risks under certain exposure conditions. The transport of viruses in the floatation process was dominated by attachment onto ore particles,in which most of them are inactivated and or irreversibly adsorbed. Remove of both viruses on ore particles decreased as solution pH value increased with the increased energy barrier between virus and ore particles, more ФX174 was removed in comparison to MS2. The attachment of both ФX174 and MS2 on mineral particles increases significantly as the decreased ore particle size.