A comprehensive review of adsorbents for fluoride removal from water: performance, water quality assessment and mechanism

Gai, Wei‐Zhuo; Deng, Zhen‐Yan

doi:10.1039/d1ew00232e

Cited by 43 publications

(25 citation statements)

References 171 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…33 However, the removal of uoride by these materials has resulted in low adsorption capacities (i.e., as low as 0.2 mg g À1 ) with long contact duration of more than 24 hours. [34][35][36][37] Therefore, in our study, we aim to synthesize a nonmaterial that would improve the adsorption capacity of uorides by creating more adsorption sites for adsorption.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of kinetics and adsorption isotherm for fluoride removal from aqueous solutions using mesoporous cerium–aluminum binary oxide nanomaterials

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…, as low as 0.2 mg g −1 ) with long contact duration of more than 24 hours. 34–37 Therefore, in our study, we aim to synthesize a nonmaterial that would improve the adsorption capacity of fluorides by creating more adsorption sites for adsorption.…”

Section: Introductionmentioning

confidence: 99%

Investigation of kinetics and adsorption isotherm for fluoride removal from aqueous solutions using mesoporous cerium–aluminum binary oxide nanomaterials

et al. 2021

View full text Add to dashboard Cite

show abstract

“…However, CaF 2 precipitation is difficult to treat in low-fluoride-concentration water since the final fluoride concentration can only be reached by 10–20 mg/L due to the solubility of CaF 2 [ 10 ]. Recent reviews have summarized and detailed the development of various fluoride removal technologies, including membrane [ 11 ], adsorption [ 12 ], electrocoagulation [ 13 ] and coagulation-precipitation [ 14 ] techniques. Among them, the use of adsorbents seems one of the most promising methods for fluoride removal [ 10 , 15 ], because it is cost-effective and easy to implement; moreover, it can have high removal capacity and can be reused [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of fluoride ions from aqueous solution by metaettringite

Iizuka

Yamasaki

2022

PLoS ONE

View full text Add to dashboard Cite

Fluoride contamination is a major problem in wastewater treatment. Metaettringite (which has previously shown enhanced anion adsorption) was investigated as a possible adsorbent to remove fluoride from low-concentration solution (25 mg-F/L). The fluoride removal properties of ettringite and metaettringite were first compared at pH 10, and metaettringite was found to be more effective. The dominant reaction mechanism for fluoride adsorption in metaettringite was found to be recrystallization of metaettringite by rehydration; this was accompanied by precipitation of calcium fluoride. The adsorption kinetics followed the pseudo-second order model. Metaettringite was also able to remove fluoride effectively in low pH environment (i.e., at pH 3.5). The influence of coexistence of sulfate ions in solution on the fluoride removal performance was investigated, and a small decrease in performance was noted. The residual fluoride concentrations obtained with higher doses of metaettringite were lower than those specified by the Japanese effluent standard (non-coastal areas: 8 mg-F/L; coastal areas: 15 mg-F/L). The fluoride removal capacity of metaettringite was compared with those of other solid materials. The observed maximum capacity was 174.7 mg-F/g-metaettringite. In the case of high fluoride concentration solution, the main removal mechanism will be changed to calcium fluoride precipitation. In general, metaettringite is regarded as promising material for fluoride removal in wastewater treatment.

show abstract

“…Although it has been found to be effective and efficient, however, its application suffers setback owing to the high production cost. [19] Thus, the continuous search for an inexpensive, locally obtainable, and environmentally friendly adsorbents is necessary especially for de-fluoridation of water.…”

Section: Introductionmentioning

confidence: 99%

Modelling the batch and fixed bed adsorption of fluoride from aqueous solutions in using activated carbon from Acacia nilotica biochar

Bhagawati¹,

Adeogun

Shivayogimath

et al. 2022

Preprint

View full text Add to dashboard Cite

Acacia nilotica biomass was used to prepare activated carbon (ANAC-800) through pyrolysis at 800oC. The ANAC-800 was used as adsorbent for the fluoride sequestration in a batch and continuous column systems. The surface morphology, elemental composition as well as particle size distribution of the adsorbent was investigated with Scanning Electron Microscopy (SEM), Elemental and Particle Size Analyzers. What’s more, the influence of initial fluoride concentrations, column packing height and the flow rate on the column efficiency were examine while the efficiency of batch process as a function of contact time and temperature was also investigated. It was found that the kinetic of the process was best fitted with second order model, while the mechanism was best explained by interparticle diffusion model. In addition, the Langmuir Isotherm model showed that the maximum monolayer adsorption capacity of fluoride removal was 71.93 mg/g. The breakthrough curve and column data were well modelled by Adams-Bohart, Yoon-Nelson and Clark model. The models were judged using Akaike Information Criteria (AIC) values after statistical evaluation. ANAC-800 removed fluoride from aqueous solution comparably higher than other adsorbent in its category in batch and continuous column systems.

show abstract

A comprehensive review of adsorbents for fluoride removal from water: performance, water quality assessment and mechanism

Abstract: Excessive intake of fluoride can lead to a series of fluorosis based diseases, and how to remove the excess fluoride from water is an urgent issue worldwide. Among various defluoridation...

Cited by 43 publications

References 171 publications

Investigation of kinetics and adsorption isotherm for fluoride removal from aqueous solutions using mesoporous cerium–aluminum binary oxide nanomaterials

Investigation of kinetics and adsorption isotherm for fluoride removal from aqueous solutions using mesoporous cerium–aluminum binary oxide nanomaterials

Removal of fluoride ions from aqueous solution by metaettringite

Modelling the batch and fixed bed adsorption of fluoride from aqueous solutions in using activated carbon from Acacia nilotica biochar

Contact Info

Product

Resources

About