基于分式析因的锌与多种污染物竞争吸附规律

Law of competitive adsorption of zinc and variety of pollutants based on fractional factorial design

为揭示农药(晶体乐果、甲霜灵、阿特拉津、马拉硫磷、扑草净)与重金属(铜、锌、铅、镉、镍)共存时的复合污染规律,以锌为目标污染物,采用完全折叠实验及区组设计辅助的分辨度为Ⅲ的210-6分式析因设计方法,研究上述污染物因子的浓度主效应以及其二阶交互效应对目标污染物因子(以锌为例)在沉积物上吸附的影响。研究结果表明:晶体乐果、甲霜灵、阿特拉津、扑草净和镍的浓度主效应对锌在沉积物上的吸附具有显著影响(显著性水平α=0.05);二阶交互效应中,农药间的二阶交互效应对锌在沉积物上的吸附影响比重金属间的二阶交互效应更显著,并且具有显著影响的二阶交互效应中均有来自农药的贡献;根据各因子主效应及二阶交互效应效应估计值,阿特拉津、晶体乐果、锌*阿特拉津、阿特拉津*晶体乐果、锌*晶体乐果、扑草净*镍对锌的吸附具有显著的协同作用,而甲霜灵、扑草净、镍、阿特拉津*甲霜灵、扑草净*阿特拉津、锌*甲霜灵对锌的吸附具有显著的拮抗作用,且可根据各因子主效应及二阶交互效应估计值,定量估算各污染物因子浓度主效应以及其二阶交互效应对目标污染物的复合污染程度。

In order to reveal the combined pollution characteristic of zinc adsorption onto the surficial sediments in pesticide （dimethoate, metalaxyl, atrazine, malathion, prometryn）/heavy metals （copper, zinc, lead, cadmium, nickel） composite contamination system, a completely foldover design and confounding design assisted resolution Ⅲ of 210-6 fractional factorial design method were used to identify the main effects and interactions of the ten pollution factors.The results show that the main influence of dimethoate, metalaxyl, atrazine, prometryn and nickel have significant effect （a=0.05） on zinc adsorption on the sediment. According to the effect estimates of main effects and second-order interaction effects, atrazine, Dimethoate, zinc＊atrazine,atrazine＊Dimethoate, zinc＊Dimethoate and prometryn＊nickel have significant synergies to adsorption of zinc, while metalaxyl, prometryn, nickel, atrazine＊metalaxyl, prometryn＊atrazine and zinc＊metalaxyl have significant antagonism to adsorption of zinc. Moreover, the compound pollution levels about the target pollutant on these main effects and second-order interaction effects of pollutant factors can be estimated.