Characteristics of selective fluoride adsorption by biocarbon-Mg/Al layered double hydroxides composites from protein solutions: Kinetics and equilibrium isotherms study

Highly selective defluoridation of brick tea infusion by tea waste supported aluminum oxides

“…In general, the percent of fluoride removal increased linearly with increasing doses of Tea‐Al. This phenomenon was quite different from biocarbon‐Mg/Al layered double hydroxides composites (CPLDH‐Ca) in LSZ and BSA systems . As the Tea‐Al doses increased from 1.0 to 4.0 g L −1 , the fluoride removal efficiency was significantly increased from 19.21% to 52.90% in brick tea infusion, which might be attributable to more available active sites to bind fluoride in the increasing dosage of sorbent .…”

“…People are frequently exposed to fluoride through water and foods . Some foods and beverages, such as certain types of tea, contain high contents of fluoride . Tea is the most popular beverage in the world after water; however, the tea plant is well known to accumulate fluoride .…”

“…Many reports have focused on biosorbent for the removal of fluoride from food and drinking water. Highly efficient and selective sorbent of Mg–Ca–Al(NO 3 )HTlcs and biocarbon–Mg/Al hydroxides composites have been successfully made and used to evaluate the removal of fluoride from protein systems, lysozyme (LSZ) and bovine serum albumin (BSA) . Tea waste is a low‐cost, porous and safe biomass material with abundant sources.…”

Green Synthesis of Iron Nano-Impregnated Adsorbent for Fast Removal of Fluoride from Water

“…There are some techniques employed for fluoride removal, but adsorption is considered as the best one due to its unique features [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Literature survey indicates few papers on fluoride removal by adsorption [19][20][21][22][23][24][25]. These methods have certain drawbacks such as poor adsorption capacities, long contact time, high dose and extremely low or high pHs.…”

Recyclable Mg–Al layered double hydroxides for fluoride removal: Kinetic and equilibrium studies

“…Indeed, Mg-Al LDH intercalated with CO 3 2− (CO 3 ‧Mg-Al LDH) is known to remove F from aqueous solutions [5,6], as can Zn-Al and Mg-Cr LDHs, intercalated with Cl − [7,8], and cellulose-supported Zn-Al LDHs [9]. In addition, selective F removal has been achieved in protein systems with biocarbon-Mg-Al LDHs [10]. Furthermore, the effect of coexistent Cl − and SO 4 2− ions was examined on the removal of F. Finally, F was desorbed from the F•Mg-Al LDH produced using NaNO 3 or NaCl solutions, and the regenerated NO 3 ‧Mg-Al or Cl‧Mg-Al LDH was used again to capture F.…”