Adsorption Mechanism and Performance of Cotton Stalk-Based Biochar
Author Information
Author(s): Cui Qiushuang, Huang Yong, Ma Xufei, Li Sining, Bai Ruyun, Li Huan, Liu Wen, Wei Hanyu
Primary Institution: Xinjiang University
Hypothesis
How do different methods of producing biochar from cotton stalks affect its ability to adsorb tetracycline and methylene blue from wastewater?
Conclusion
Biochar produced using the molten salt method is more effective at removing tetracycline, while the impregnation method is better for methylene blue.
Supporting Evidence
- The biochar produced using the molten salt method had a maximum specific surface area of 3095 m2/g.
- KBCM-900 showed a tetracycline clearance rate of over 95% in 180 minutes.
- The adsorption rates for methylene blue did not differ significantly at low concentrations between the two biochars.
- KBCI-900 exhibited better adsorption for methylene blue at higher concentrations.
- The adsorption processes were described by the pseudo-second-order kinetic model and the Langmuir isotherm model.
Takeaway
This study shows that biochar made from cotton stalks can clean up dirty water by soaking up harmful chemicals, and different ways of making the biochar work better for different types of pollutants.
Methodology
Two types of biochar were produced from cotton stalks using molten salt and impregnation methods, and their adsorption performance for tetracycline and methylene blue was compared.
Limitations
The study primarily focuses on two specific pollutants and may not generalize to other contaminants.
Digital Object Identifier (DOI)
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