Contribution of coated humic acids calculated through their surface coverage on nano iron oxides for ofloxacin and norfloxacin sorption

被引：37

作者：

Peng, Hongbo ^{[1
]}

Liang, Ni ^{[1
]}

Li, Hao ^{[1
]}

Chen, Fangyuan ^{[1
]}

Zhang, Di ^{[1
]}

Pan, Bo ^{[1
]}

Xing, Baoshan ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650500, Yunnan, Peoples R China

[2] Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA

来源：

ENVIRONMENTAL POLLUTION | 2015年 / 204卷

关键词：

Engineered nanoparticles; Ionic organic contaminants; Mineral particles; Organo-mineral complex; Pharmaceuticals; DISSOLVED ORGANIC-MATTER; PHENANTHRENE SORPTION; ADSORPTION; CARBON; SOIL; WATER; PHARMACEUTICALS; FRACTIONATION; TETRACYCLINE; CONTAMINANTS;

D O I：

10.1016/j.envpol.2015.04.029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sorption of organic contaminants on organo-mineral complexes has been investigated extensively, but the sorption contribution of mineral particles was not properly addressed before calculating K-OC, especially for ionic organic contaminants. We measured the surface coverage of a humic acid (HA) on nano iron oxides (n-Fe2O3) in a series of synthesized organo-mineral complexes. The contribution of the coated HA to ofloxacin (OFL) and norfloxacin (NOR) sorption in HA n-Fe2O3 complexes was over 80% of the total sorption with the surface coverage of 36% and foc of 1.6%. All the coated HA showed higher sorption to NOR and OFL in comparison to the original HA, suggesting HA fractionation and/or physical re-conformation during organo-mineral complex formation. The decreased K-OC with multilayer coating may suggest the importance of site-specific interactions for OFL sorption, while the increased K-OC with multilayer coating may suggest the importance of partitioning in hydrophobic region for NOR sorption. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：191 / 198

页数：8

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