摘要
为了研究不同来源的腐植酸(HA)/纳米二氧化钛(nmTiO2)复合物对典型抗生素环境行为的影响,采用批量平衡振荡法,分别考察了吸附等温线、离子强度以及pH值对纳米二氧化钛/HA吸附泰乐菌素(TYL)的影响。结果表明:TYL在TiO2/不同来源的HA复合物上的吸附容量不同,顺序为,BZ/TiO2>DC/TiO2>NT/TiO2>DN/TiO2,添加腐植酸后,吸附容量明显增加,离子交换可能是泰乐菌素在HA/TiO2复合物上吸附的主要机理;随着pH值的升高,吸附容量逐渐增大;而随着离子强度的增加,吸附容容量显示减小。这意味着纳米二氧化钛进入环境后,随着环境条件的改变,其对抗生素的吸附能力也将发生改变,进而对抗生素在水环境中的迁移造成影响。
In order to understand the influence of HA/nano-TiO2 complex on the environment behaviors of representative antibiotics in aqueous environment, batch adsorption experiments were conducted to investigate the effects of ionic strength, the sorption isotherm and pH value on sorption of tylosin on HA/nano- TiO2. The results showed that TYL adsorption capacity different in TiO2/HA composites from different sources, BZ/TiO2〉DC/TiO2〉NT/TiO2〉DN/TiO2, respectively. Addition of humic acid, the adsorption capacity increased significantly, ion exchange is probably the tylosin in HA/TiO2, composites on the main mechanism of adsorption. The adsorption capacity increased as pH value increased; With the increase of ionic strength, sorption of tylosin decreased.. It indicates that the sorption ability of nano-TiO2 might he alternated according to the variable environment, thus affected the transportation and transformation of antibiotics in aquatic environment.
出处
《广东化工》
CAS
2014年第6期1-2,7,共3页
Guangdong Chemical Industry
基金
国家自然科学基金资助项目(41072268)
广州市珠江科技新星项目(2011J2200060)
广东省普通高校水土环境毒害性污染物防治与生物修复重点实验室开放基金
