Molybdenum disulfide anchored peanut shell biochar composite for efficient adsorption of Pb2+: Performance and mechanism
Heavy metal lead (Pb2+) contamination in water poses a serious threat to human health, and developing some effective strategies for the removal of Pb2+ is urgent. Herein, molybdenum disulfide (MoS2) anchored peanut shell biochar (BC) composite adsorbents were successfully prepared by hydrothermal me...
Saved in:
Published in | Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 700; p. 134830 |
---|---|
Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
05.11.2024
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Heavy metal lead (Pb2+) contamination in water poses a serious threat to human health, and developing some effective strategies for the removal of Pb2+ is urgent. Herein, molybdenum disulfide (MoS2) anchored peanut shell biochar (BC) composite adsorbents were successfully prepared by hydrothermal method and applied for the adsorption of Pb2+. Among these composites, the MoS2/BC-3 composite displayed the best adsorption performance with the adsorption capacity of 232 mg·g−1 at 30 °C. The adsorption procedure followed the pseudo-secondary kinetics and Freundlich adsorption model, indicating that the adsorption process of Pb2+ over MoS2/BC-3 composite was chemical and multilayer adsorption. Moreover, Pb2+ was spontaneously adsorbed by MoS2/BC-3, and the adsorption capacity increased with the enhance of temperature. The main mechanisms involved in the adsorption of Pb2+ by MoS2/BC-3 composite were found to include electrostatic interaction and complexation interaction. In addition, the MoS2/BC-3 composite had a good stability, and the Pb2+ removal rate could still reach more than 80 % after 6 cycles of adsorption experiments. Meanwhile, the adsorbent demonstrated a strong ability to absorb common heavy metals including copper and cadmium, further confirming that the MoS2/BC-3 composite had a potential value.
[Display omitted]
•The MoS2/BC composite adsorbents were prepared by hydrothermal method using peanut shell biochar as a carrier.•The MoS2/BC-3 composite displayed the outstanding adsorption performance for Pb2+.•The main adsorption mechanisms were clarified by FTIR, BET and XPS tests.•The MoS2/BC-3 composite exhibited a good stability and reusability. |
---|---|
ISSN: | 0927-7757 |
DOI: | 10.1016/j.colsurfa.2024.134830 |