A novel hay-derived biochar for removal of tetracyclines in water

被引：142
作者：
Jang, Hyun Min [1 ,2 ]
Kan, Eunsung [1 ,2 ,3 ]
机构：
[1] Texas A&M Univ, Dept Agr & Biol Engn, College Stn, TX 77843 USA
[2] Texas A&M Univ, Texas A&M AgriLife Res Ctr Stephenville, College Stn, TX 77843 USA
[3] Tarleton State Univ, Dept Wildlife Sustainabil & Ecosyst Sci, Stephenville, TX USA
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 274卷
关键词：
Alfalfa; Bermudagrass; Biochar; Tetracycline; Adsorption; Hydroxyapatite; AQUEOUS-SOLUTION; ACTIVATED CARBONS; EFFICIENT ADSORPTION; WASTE-WATER; ANTIBIOTICS; MECHANISM; RESIDUES; SORPTION; DEGRADATION; PERFORMANCE;
D O I：
10.1016/j.biortech.2018.11.081
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The biochars derived from alfalfa (AF) and bermudagrass (BG), the abundant grass hays to cows, were prepared, characterized and used for removal of tetracycline (TC) in water. The alfalfa-derived biochar (AF-BC) has exhibited outstanding TC adsorption capacity (372 mg/g), which was about 8-fold higher than that of bermudagrass-derived biochar (BG-BC). In addition, the TC adsorption capacity of AF-BC was comparable with those of the commercial activated carbons under the same conditions. The surface structure, chemistry and high ash contents of AF-BC suggested the hydrogen bonding, electrostatic interactions and surface complexation between AF-BC and TC. Furthermore, hydroxyapatite (HAP; Ca-5(PO4)(3)OH) and calcite (CaCO3) on the surface of AF-BC may also contribute to adsorption of TC via surface complexation, hydrogen bonding and electrostatic interactions. The alkaline desorption-driven regeneration of TC-spent AF-BC led to effective adsorption-desorption for multiple cycles, which indicated AF-BC could be a cost-effective adsorbent for TC in water and wastewater.
引用
收藏
页码：162 / 172
页数：11
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