Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 59, Issue 33, Pages 14578-14586Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.0c02301
Keywords
-
Categories
Funding
- National Key Research and Development Program of China [2018YFC1901, 2018YFC1902105, 2018YFC1902102]
- National Natural Science Foundation of China [21767015, 21968014]
Ask authors/readers for more resources
Removal of phosphate in wastewater is significant and available to control eutrophication, and adsorption is one of the most promising treatment methods. In this work, MgO-modified industrial hemp-stem-driven biochar was formed by in situ precipitation. Different from the adsorption behavior for phosphate using other adsorbents, the doped MgO nanoparticles onto the holes of biochar have been combined with phosphate to form stable crystal substances, e.g., the flowerlike Mg-x(PO4)(y)center dot zH(2)O. The results showed that, during the phosphate removal process, amorphous, single crystal, and polycrystal compounds were formed by ionic bonding and crystallization effect, which could be good for strong immobilization of the phosphate ions onto the surface of biochar. The characterization adsorbent results further confirmed that the carbonization condition also has an impact on the specific surface area of biochar and crystalline performance of MgO, and it affected the adsorption capacity of phosphate. The maximum adsorption capacity of phosphate was 233 mg/g with the Langmuir isotherm model, and the optimal pH value of adsorption was 9. Adsorption thermodynamics and kinetics results indicated that the adsorption process of phosphate was considered spontaneous, monolayer, and chemical sorption. MgO/biochar was highly selective for phosphate through studying the adsorption effect of other anions on phosphate. This application of low-cost hemp stalk provides a suitable method for disposal and a high-value utilization of corresponding agricultural wastes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available