次氯酸钠消毒剂对绕线虫的灭活动力学研究

Inactivation Kinetics of Plectus sp.in Application of Disinfection with Sodium Hypochlorite

绕线虫是饮用水中检出率较高的一种线虫。次氯酸钠消毒剂对绕线虫的灭活试验结果表明:当次氯酸钠浓度为80 mg/L、接触时间为180 min时绕线虫的灭活率仅达87%,显示了绕线虫对氯消毒剂有很强的抵抗力。次氯酸钠消毒剂对绕线虫的灭活过程表现为两个阶段:不能使绕线虫致死的延迟作用阶段和一级反应阶段。延迟作用时间与次氯酸钠浓度有相关关系;一级反应可用Hom模型反映次氯酸钠浓度和接触时间与绕线虫灭活率之间的关系。

Plectus sp. is a kind of nematode which is frequently detected in drinking water. The results show that the inactivation rate of Plectus sp. is 87 % when even exposed to 80 mg/L of sodium hypochlofite for 180 minutes, which displays that Plectus sp. has strong resistibility to the inactivation of sodium hypochlorite. The inactivation process can be divided into two steps： the lag step and first order disinfection step. There is correlation between lag time and the concentration of sodium hypochlorite. In first order disinfection step, the kinetics of inactivating Plectus sp. can be comprehensively described by Horn model.