胶体对药物活性化合物的吸附作用
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摘要
自然水体中的胶体是指粒径介于1 nm～1μm之间的颗粒物,主要存在于水环境中,其数量大、种类多且比表面积大。本文分别探究在静态和动态实验条件下,超滤膜及超滤装置对污染物的吸附情况,及不同浓度胶体对污染物的吸附特性。胶体-PhACs吸附动力学实验结果显示,胶体能迅速吸附PhACs,在5 min内达到吸附饱和,且随胶体浓度增加,Cr/Cp呈线性增加,表明天然水体中胶体是影响PhACs环境归宿的重要因素。
In natural waters, colloids refer to particulates with particle sizes ranging from 1 nm to 1 m, which mainly exist in the water environment. They are large in number, variety and specific surface area. The adsorption of pollutants by ultrafiltration membranes and devices and the adsorption characteristics of different concentration colloids under static and dynamic experimental conditions were investigated. The results of colloid-PhACs adsorption kinetics experiment showed that the colloid can adsorb PhACs rapidly and reach adsorption saturation within 5 min. With the increase of colloid concentration, Cr/Cp increased linearly, which indicated that colloid was an important factor affecting the environmental fate of PhACs in natural water.
In natural waters, colloids refer to particulates with particle sizes ranging from 1 nm to 1 m, which mainly exist in the water environment. They are large in number, variety and specific surface area. The adsorption of pollutants by ultrafiltration membranes and devices and the adsorption characteristics of different concentration colloids under static and dynamic experimental conditions were investigated. The results of colloid-PhACs adsorption kinetics experiment showed that the colloid can adsorb PhACs rapidly and reach adsorption saturation within 5 min. With the increase of colloid concentration, Cr/Cp increased linearly, which indicated that colloid was an important factor affecting the environmental fate of PhACs in natural water.
引文
[1] CHENG D,LIU X,ZHAO S,et al.Influence of the natural colloids on the multi-phase distributions of antibiotics in the surface water from the largest lake in North China[J].Science of the total environment,2017,578:649-659.
[2] YAN C,YANG Y,ZHOU J,et al.Selected emerging organic contaminants in the Yangtze Estuary,China:a comprehensive treatment of their association with aquatic colloids[J].Journal of hazardous materials,2015,283:14-23.
[3] CHENG D,LIU X,ZHAO S,et al.Influence of the natural colloids on the multi-phase distributions of antibiotics in the surface water from the largest lake in North China[J].The science of the total environment,2016,578:649-659.
[4] YAN C,NIE M,YANG Y,et al.Effect of colloids on the occurrence,distribution and photolysis of emerging organic contaminants in wastewaters[J].Journal of hazardous materials,2015,299:241-248.
[5] MASKAOUI K,HIBBERD A,ZHOU J L.Assessment of the interaction between aquatic colloids and pharmaceuticals facilitated by cross-flow ultrafiltration[J].Environmental science & technology,2007,41(23):8038-8043.
[6] DUAN Y P,MENG X Z,WEN Z H,et al.Multi-phase partitioning,ecological risk and fate of acidic pharmaceuticals in a wastewater receiving river:the role of colloids[J].The science of the total environment,2013,447:267-273.
[7] MASKAOUI K,ZHOU J L.Colloids as a sink for certain pharmaceuticals in the aquatic environment[J].Environmental science and pollution research,2010,17(4):898-907.
[2] YAN C,YANG Y,ZHOU J,et al.Selected emerging organic contaminants in the Yangtze Estuary,China:a comprehensive treatment of their association with aquatic colloids[J].Journal of hazardous materials,2015,283:14-23.
[3] CHENG D,LIU X,ZHAO S,et al.Influence of the natural colloids on the multi-phase distributions of antibiotics in the surface water from the largest lake in North China[J].The science of the total environment,2016,578:649-659.
[4] YAN C,NIE M,YANG Y,et al.Effect of colloids on the occurrence,distribution and photolysis of emerging organic contaminants in wastewaters[J].Journal of hazardous materials,2015,299:241-248.
[5] MASKAOUI K,HIBBERD A,ZHOU J L.Assessment of the interaction between aquatic colloids and pharmaceuticals facilitated by cross-flow ultrafiltration[J].Environmental science & technology,2007,41(23):8038-8043.
[6] DUAN Y P,MENG X Z,WEN Z H,et al.Multi-phase partitioning,ecological risk and fate of acidic pharmaceuticals in a wastewater receiving river:the role of colloids[J].The science of the total environment,2013,447:267-273.
[7] MASKAOUI K,ZHOU J L.Colloids as a sink for certain pharmaceuticals in the aquatic environment[J].Environmental science and pollution research,2010,17(4):898-907.