Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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Adsorption of 2,4,6-Trichlorophenol in Water by Nitrogen and Sulfur Co-doped Sludge Biochar
DOI:
10.16355/j.tyut.1007-9432.20230250
Received:
Accepted:
| Corresponding author | Institute | |
| CUI Jiali | College of Environmental Science and Engineering, Taiyuan University of Technology |
abstract:
【Purposes】2,4,6-Trichlorophenol (2,4,6-TCP) has been listed in the blacklist of pollutants in water because of its strong toxicity and“three inducing”effects. It is of great significance to remove 2,4,6-TCP from water.【Methods】Nitrogen and sulfur co-doped sludge biochar (Sx-NSC800) was prepared from municipal sludge by impregnation-pyrolysis method and used to adsorb 2,4,6-TCP in aqueous solution. The structure and surface chemical properties of Sx-NSC800 were characterized by scanning electron microscopy, specific surface and aperture analysis, X-ray diffraction, and Fourier infrared spectrometry. The pseudo-first-order kinetic and pseudo-second-order kinetic models were used to fit the adsorption kinetic data.【Findings】The results show that Sx-NSC800 has a good adsorption effect on 2,4,6-TCP, and approaches the adsorption/desorption equilibrium at about 180 min. S10-NSC800 exhibits the best effect with the adsorption capacity of 14.424 mg/g. The adsorption data have good correlations with the pseudo-second-order kinetic model. The isothermal adsorption outcome is more consistent with Freundlich isotherm model, which shows that the adsorption behavior of Sx-NSC800 is easy to take place. Temperature rising is conducive to adsorption. And the adsorption is a spontaneous process with increasing of chaos degree. The adsorption mechanism involves pore filling, hydrogen bonding, andπ-πinteraction.
Keywords:
sludge; biochar; adsorption kinetics; adsorption isotherms; 2,4,6-trichlorophenol;