Next Article in Journal
Common Secondary and Tertiary Structural Features of Aptamer–Ligand Interaction Shared by RNA Aptamers with Different Primary Sequences
Previous Article in Journal
Intramolecular Hydrogen Bonds in Normal and Sterically Compressed o-Hydroxy Aromatic Aldehydes. Isotope Effects on Chemical Shifts and Hydrogen Bond Strength
Open AccessArticle

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

by Yixin Cai 1,2, Liming Liu 1,2, Huafeng Tian 1,*, Zhennai Yang 1,* and Xiaogang Luo 1,2,3,*
1
Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China
2
School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, LiuFang Campus, No.206, Guanggu 1st road, Donghu New & High Technology Development Zone, Wuhan 430205, Hubei Province, China
3
School of Materials Science and Engineering, Zhengzhou University, No.100 Science Avenue, Zhengzhou 450001, Henan Province, China
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(24), 4534; https://doi.org/10.3390/molecules24244534
Received: 4 November 2019 / Revised: 8 December 2019 / Accepted: 9 December 2019 / Published: 11 December 2019
(This article belongs to the Section Green Chemistry)
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 m2 g−1 with the average pore diameter and pore volume reaching 2.52 nm and 0.45 m3 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 π–π interactions and cation–π 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. View Full-Text
Keywords: adsorption; desorption; mechanism; sugar cane bagasse; activated carbons; tetracycline adsorption; desorption; mechanism; sugar cane bagasse; activated carbons; tetracycline
Show Figures

Graphical abstract

  • Supplementary File 1:

    PDF-Document (PDF, 624 KB)

  • Externally hosted supplementary file 1
    Doi: 10.5281/zenodo.3566841
    Link: https://zenodo.org/record/3566841#.Xex67LCHqUk
    Description: Supplementary Materials: The following are available online at www.mdpi.com/xxx/s1, Figure S1: (a) XRD patterns of bagasse and ZBAC; (b) FT-IR spectra of bagasse, ZBAC and loaded ZBAC; Figure S2: TGA/DTG curves for bagasse and ZIB (a) bagasse, (b) ZIB. Tables S1: SBET, DP and Vmic of BAC and ZBAC; Tables S2: Kinetic Parameters of TCH Removal onto ZBAC; Tables S3: RL values at various temperatures and initial concentrations; Tables S4: Constant parameter and correlation coefficients calculated for various adsorption models at different temperatures for TCH on ZBAC; Tables S5: Adams−Bohart, Thomas, Yoon−Nelson, BDST, Dose Response and Clark Model.
MDPI and ACS Style

Cai, Y.; Liu, L.; Tian, H.; Yang, Z.; Luo, X. Adsorption and Desorption Performance and Mechanism of Tetracycline Hydrochloride by Activated Carbon-Based Adsorbents Derived from Sugar Cane Bagasse Activated with ZnCl2. Molecules 2019, 24, 4534.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop