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Doan, Chon Tien. Adsorption of heavy metals using different functionalized carbon microsphere adsorbents from xylose. Master's Degree(Chemistry). Thammasat University. Thammasat University Library. : Thammasat University, 2017.
Adsorption of heavy metals using different functionalized carbon microsphere adsorbents from xylose
Name: Doan, Chon Tien
keyword:
Carbon microsphere adsorbent
;
Xylose
Abstract:
This research studied the application of heavy metal ions removal by using different functionalized carbon microsphere adsorbents from xylose. The modification of adsorbents were prepared via xylose hydrothermal carbonization and following sulfonation, carboxylation, and amination of hydrochar to obtain the CM-SO3H, CM-COOH, CM-NH¬2, respectively. The morphology of functionalized carbon microsphere adsorbents were characterized by Scanning Electron Microscope (SEM), while the functional groups on the adsorbent surface were confirmed by Fourier Transform Infrared spectroscopy (FTIR). For the heavy metal adsorption, the different experimental factors were investigated including solution pH, adsorbent dosage, contact time, initial concentration on the adsorption capacity. The adsorption capacity was reached equilibrium for all metal ions at approximately 120 min. The highest adsorption capacities of Cu(II) and Ni(II) were obtained at pH 5 for all adsorbents, whereas that of Cr(VI) was achieved at pH 2. The adsorption kinetics were found fit to pseudo-second-order model for all modified carbon microsphere adsorbents. Moreover, the adsorption experimental data of Cu(II), and Ni(II) onto the CM-SO3H, Cr(VI) onto the CM-NH2 adsorbents followed Langmuir isotherm better than Freundlich isotherm model, meanwhile that of all metal onto the CM-COOH and Cu(II) and Ni(II) onto the CM-NH2 well fitted for the Freundlich model. In this research, it can be found that the maximum adsorption capacity of Cu(II) onto CM-SO3H, Ni(II), and Cr(VI) onto the CM-NH2 reached 149.81 mg g-1, 119.76 mg g-1, and 111.8 mg g-1, respectively. The reusability of CM-SO¬3H adsorbent was still achieved at 76.17 % for Cu(II), 65.13 % for Ni(II), and 64.28 % for Cr(VI) after 4 cycles.
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Chanatip Samart
Role:
advisor
Name: Prasert Reubroycharoen
Role:
co-advisor
Created:
2017
Modified:
2021-05-19
Issued:
2021-05-19
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Chemistry
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.03084 วินาที
Doan, Chon Tien
| Title | Contributor | Type |
|---|---|---|
| Adsorption of heavy metals using different functionalized carbon microsphere adsorbents from xylose
มหาวิทยาลัยธรรมศาสตร์ Doan, Chon Tien | Chanatip Samart Prasert Reubroycharoen | วิทยานิพนธ์/Thesis |
Chanatip Samart
Prasert Reubroycharoen