Antibiotic removal by agricultural waste biochars with different forms of iron oxide

被引：58

作者：

Chen, Yue ^{[1
]}

Shi, Jing ^{[1
,2
]}

Du, Qiong ^{[1
]}

Zhang, Haowen ^{[1
]}

Cui, Yixin ^{[1
]}

机构：

[1] China Pharmaceut Univ, Sch Engn, Nanjing 211198, Jiangsu, Peoples R China

[2] McMaster Univ, Dept Civil Engn, Hamilton, ON L8S 4L7, Canada

来源：

RSC ADVANCES | 2019年 / 9卷 / 25期

基金：

中国国家自然科学基金;

关键词：

RAY PHOTOELECTRON-SPECTROSCOPY; AQUEOUS-SOLUTION; TETRACYCLINE ANTIBIOTICS; MAGNETIC BIOCHAR; CU(II) IONS; ADSORPTION; LEVOFLOXACIN; WATER; SORPTION; CARBON;

D O I：

10.1039/c9ra01271k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pollution by antibiotics has become a serious threat to public health. In this study, agricultural waste, corn husk, in the form of biochar, was utilized for antibiotic removal from wastewater. Two kinds of iron-loaded biochars, impregnation-pyrolysis biochar (IP) and pyrolysis-impregnation biochar (PI), were synthesized to adsorb the typical antibiotics tetracycline (TC) and levofloxacin (LEV). PI contained amorphous hydrated iron oxide, whereas the major component of IP was gamma-Fe2O3. Compared with IP, PI had a much higher adsorption capacity for both TC and LEV. This was because PI could provide more -OH, especially -OHads, to serve as the adsorption sites. In comparison with TC, -OH was prone to combine with LEV. FT-IR and XPS results indicated that the mechanisms of LEV adsorption included hydrogen bonding, F-replacement, electrostatic attraction and bridging bidentate complexation. TC adsorption may involve complexation, hydrogen bonding and electrostatic attraction.

引用

页码：14143 / 14153

页数：11

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