Effects of Dissolved Organic Matter on Sorption of Oxytetracycline to Sediments

被引:42
作者
Wang, Zongzhou [1 ,2 ]
Jiang, Qianli [3 ]
Wang, Runze [1 ,2 ]
Yuan, Xiaoyu [1 ,2 ]
Yang, Shengke [1 ,2 ]
Wang, Wenke [1 ,2 ]
Zhao, Yaqian [4 ]
机构
[1] Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Xian 710054, Shaanxi, Peoples R China
[2] Changan Univ, Sch Environm Sci & Engn, Xian 710054, Shaanxi, Peoples R China
[3] Weinan Inst Environm Sci, Weinan 714000, Shaanxi, Peoples R China
[4] Univ Coll Dublin, Sch Civil Engn, Dooge Ctr Water Resource Res, Dublin 4, Ireland
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
FACILITATED TRANSPORT; ADSORPTION; SOIL; FLUORESCENCE; WATER; ACID; ANTIBIOTICS; TETRACYCLINE; NAPROPAMIDE; VETERINARY;
D O I
10.1155/2018/1254529
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The effects of two representative dissolved organic matters (DOMs) (derived from corrupt plants (PDOM) and chicken manure (MDOM)) on sorption characteristic of oxytetracycline to three typical sediments (first terrace (FT), river floodplain (RF), and riverbed (RB) sediments collected from the Weihe River) were investigated. Results showed that both DOMs can make the adsorption equilibrium time advance about 6 hours. The presence of DOMs changed the sorption kinetics model and the spontaneous degree of the reaction but did not change the sorption isotherm models. The adsorption of oxytetracycline (OTC) could be promoted by adding PDOM, and its maximum adsorption amount increased by 23.8% for FT, 38.0% for RB, and 28.3% for RF, respectively, whereas MDOM could inhibit the adsorption and maximum adsorption amount decreased by 23.3% for FT, 11.6% for RB, and 16.1% for RF, respectively. In addition, the DOM concentration also affected the adsorption. Overall, this study suggests that the humus-like DOM can promote the adsorption of OTC while the protein-like DOM can inhibit the adsorption of OTC to sediments, which is determined by the aromaticity, hydrophilicity, and polarity of the DOMs.
引用
收藏
页数:12
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