Adsorption and Desorption Performance and Mechanism of Tetracycline Hydrochloride by Activated Carbon-Based Adsorbents Derived from Sugar Cane Bagasse Activated with ZnCl2

被引：52
作者：
Cai, Yixin [1 ,2 ]
Liu, Liming [1 ,2 ]
Tian, Huafeng [1 ]
Yang, Zhennai [1 ]
Luo, Xiaogang [1 ,2 ,3 ]
机构：
[1] BTBU, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing 100048, Peoples R China
[2] Wuhan Inst Technol, Sch Chem Engn & Pharm, Donghu New & High Technol Dev Zone, LiuFang Campus 206,Guanggu 1st Rd, Wuhan 430205, Hubei, Peoples R China
[3] Zhengzhou Univ, Sch Mat Sci & Engn, 100 Sci Ave, Zhengzhou 450001, Henan, Peoples R China
来源：
MOLECULES | 2019年 / 24卷 / 24期
基金：
中国国家自然科学基金;
关键词：
adsorption; desorption; mechanism; sugar cane bagasse; activated carbons; tetracycline; HEAVY-METAL IONS; EFFICIENT REMOVAL; AQUEOUS-SOLUTION; ZINC; WASTE; WATER; NANOTUBES; ANTIBIOTICS; PYROLYSIS; PHOSPHATE;
D O I：
10.3390/molecules24244534
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Adsorption and desorption behaviors of tetracycline hydrochloride by activated carbon-based adsorbents derived from sugar cane bagasse modified with ZnCl2 were investigated. The activated carbon was tested by SEM, EDX, BET, XRD, FTIR, and XPS. This activated carbon exhibited a high BET surface area of 831 m(2) g(-1) with the average pore diameter and pore volume reaching 2.52 nm and 0.45 m(3) g(-1), respectively. The batch experimental results can be described by Freundlich equation, pseudo-second-order kinetics, and the intraparticle diffusion model, while the maximum adsorption capacity reached 239.6 mg g(-1) under 318 K. The effects of flow rate, bed height, initial concentration, and temperature were studied in fixed bed adsorption experiments, and adsorption data were fitted with six dynamic adsorption models. The results of characterizations and the batch experiments were analyzed to study the adsorption and desorption mechanisms. Tetracycline hydrochloride and activated carbon were bonded together by pi-pi interactions and cation-pi bonds. Ethanol was used as an eluent which bonded with 10 hydrogen bond acceptors on tetracycline hydrochloride to form a complex by hydrogen bonding to achieve recycling.
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页数：17
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