Preparation of Al-loaded magnetic Chinese medicine residue-derived biochar and application of it in fluoride removal

High value-added utilization of secondary aluminum ash & carbide slag: preparation of a high-performance adsorbent for rapid removal of fluoride from wastewater

“…The results showed that, at a low initial concentration of fluoride, the active sites on the surface of the materials were not fully occupied by fluoride, and fluoride could interact sufficiently with the adsorbent surface. 44 As the initial fluorine concentration increased, the adsorption capacity of the adsorbent increased, while the removal efficiency for fluorine decreased. The dosage of the adsorbent is unchanged, and the sites that can bind with fluoride are limited, while the initial concentration is continually increasing, so that the binding sites are lacking, which eventually leads to the removal efficiency constantly decreasing with the increase of the initial concentration.…”

Recent Advances in Solid Residues Resource Utilization in Traditional Chinese Medicine

“…In another study, TCMR, Fe 2+ , Fe 3+ , and Al(NO 3 ) 3 formed a new Al‐loaded magnetic material for fluoride adsorption. Fluoride adsorption increased dramatically with a decrease in pH, which was 37.38 mg/g with a pH of 4 [72] …”

“…Recovering biochar powder from wastewater is difficult when using biochar for industrial wastewater treatment [2] . One common approach to the furthermore is the incorporation of magnetic nanoparticles into adsorbents [2,70–72] . Therefore, the improved adsorbent is simple to separate in the presence of external magnetic fields.…”

“…Fluoride adsorption increased dramatically with a decrease in pH, which was 37.38 mg/g with a pH of 4. [72] Table 2. Comparison of the different biomass pyrolysis technologies.…”

Defluoridation using hydroxyapatite implanted lanthanum organic framework-based bio-hybrid beads

“…36 Tie et al studied aluminum-based biochar for efficient fluoride removal. 37 Gupta et al studied arsenic and fluoride removal using novel functional metallopolymer microspheres. 38 Robledo-Peralta et al developed Zr-based biocomposite materials as an alternative for fluoride removal, preparation and characteristics.…”