Removal of Fluoride from Aqueous Solution Using Biomass-Based Adsorbents: A Review

Abstract

Various separation techniques have been successful for the removal of fluoride from aqueous solution. In this review, an extensive list of various biomass-based adsorbents from literature has been explored and their adsorption capacities under different conditions for the removal of fluoride available in the literature to date are presented. Several adsorbents have shown good adsorption capacities; however, modified biomass had shown excellent adsorption capacities compared to commercial materials. This paper reviews the fluoride uptake capacities of biomass materials and their modified forms as adsorbents against different experimental limits.

Acid-treated pomegranate peel; An efficient biosorbent for the excision of hexavalent chromium from wastewater

“…Several methods are being studied and used to eliminate Cr(VI) from the aquatic environment, some of which are ion exchange [ 18 , 19 ], electro-dialysis [ 20 ], redox reaction, membrane technology [ 21 ], and adsorption [ [22] , [23] , [24] ]. Most of the aforementioned solutions can only be used to a certain extent due to the requirement for expensive equipment, incomplete metal removal, hazardous waste sludge, and disposal [ 16 , [25] , [26] , [27] ]. According to reports, the adsorptive method of removal is the one most frequently utilized to remove Cr(VI) and other heavy metal contaminants from wastewater.…”

Recent Advances in Biomass-Based Waste Materials for the Removal of Chromium (VI) from Wastewater: A Review

“…Various methods, such as electro-dialysis, membrane technology, redox reaction followed by precipitation, ion exchange, and adsorption are applied to eliminate(VI) from the aquatic environment [13,14]. Requirements for the high energy and expensive instruments, lacking metal removal completion, toxic waste sludge, and disposals, etc., are the reasons which limit the use of most of the options mentioned above [15][16][17][18]. The adsorptive method of removal is the most widely used method for the removal of heavy metal pollutants, including Cr(VI), from the wastewater due to the availability of cheaper materials for the production of low-cost adsorbents [19,20].…”

Effective Chromium (VI) Removal from Contaminated Water by Chemically Modified Litchi Chinensis Seed Powder: Characterization, Kinetic and Isotherm Studies

“…al., 2015). However, because of the need for costly equipment, lack of sensitivity, poor removal efficiency, and other factors, most of the preceding remedies can only be employed to a certain extent (Aryal et al, 2022;Aryal et al, 2019;Homagai et al, 2023;Saha et al, 2011). The adsorption method has become increasingly common due to the accessibility of less expensive components to produce inexpensive adsorbents (Bingol et al, 2004;Bashyal et al, 2023;Poudel et al, 2024).…”