摘要
借助灰色关联度筛选出复合污染体系Cd2+/AT,Cu2+/AT中沉积物和生物膜吸附阿特拉津(AT)的主要吸附位,包括活性组分铁氧化物(Fe)、锰氧化物(Mn)、有机质(OMs)及其交互作用,并建立主要吸附位与AT吸附量的多元线性回归模型.多元线性回归模型结果表明:Cd2+对AT的吸附表现为协同作用,Cd2+质量浓度为0.2 mg.L-1时协同效应最显著;Cu2+对AT的吸附表现为拮抗作用,抑制效应随Cu2+质量浓度增大呈逐渐增强趋势.Cd2+,Cu2+显著影响了活性组分及其交互作用对AT的吸附行为,活性组分之间的交互作用在AT迁移转化方面发挥着至关重要的作用.
The main sites of atrazine （AT） adsorption onto the surficial sediments and natural surficial coating samples in Cd2＋/AT, Cu2＋/AT composite contamination systems were filtrated according to gray correlation of the active fractions of Fe oxides, Mn oxides, organic materials and their interactions. A multiple regression model between AT adsorption amount and main adsorption sites was established. The results show that Cd2＋ expresses synergetic effect on AT adsorption with the most significant efficiency at Cd2＋ level of 0.2 mg ~ L-x. The antagonistic effect caused by CuE＋ on AT adsorption is generally en- hanced by the increasing of Cu2＋ levels. Cd2＋ or Cu2＋ can dramatically influence active fractions and their interactions on AT adsorption. The interactions among active fractions play an important role in con- trolling the environmental behaviors of AT in aquatic environments.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2012年第2期223-227,共5页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(50879025)
关键词
表层沉积物
生物膜
重金属
阿特拉津
灰色关联度
复合污染
交互作用
surficial sediments
natural surficial coating samples
heavy metals
atrazine
grey correla-tion
composite contamination
interactions
