Defluoridation of reject water from a reverse osmosis unit and synthetic water using adsorption

Samrat, M.V.V. Naga; Rao, K. Uma; SenGupta, Arup K.; Riotte, Jean; Mudakavi, J. R.

doi:10.1016/j.jwpe.2017.07.015

Cited by 20 publications

(6 citation statements)

References 49 publications

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“…It is "the downward adjustment of the level of fluoride in water to the optimum level". Various defluorination techniques implemented for fluoride remediation from groundwater include coagulation/precipitation, membrane separation (reverse osmosis, electro-dialysis, and nanofiltration), ion exchange, and adsorption [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. The practical applicability of these defluorination techniques relies on local needs, availability, fluoride concentration, type of source, and prevailing geographical and economic conditions.…”

Section: Defluorination Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Remediation Techniques Used for Removal of Fluoride from Groundwater: A Concise Review

Kashyap,

Kaushal,

Rani

2023

J. Phys.: Conf. Ser.

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Due to the increase in industrialization, climate change, and urbanization, the quality of drinking water is declining day by day. Fluoride levels in drinking water have seen a remarkable increase in several places across the world in the last decade. The accumulation of fluoride in an aqueous environment is caused by both natural as well as anthropogenic sources. The main concern regarding fluoride contamination is dental and bones related issues. According to WHO guidelines, the permissible limit of fluoride in drinking water is 1.5 mg/L. Fluoride contamination causes a detrimental effect on the health of the people. This article highlights the distribution of fluoride in India, as well as the many routes by which it enters the human body and probable fluoride metabolism inside the body. The numerous strategies used to remediate fluoride from water, like precipitation/coagulation, ion exchange, membrane separation, electro-separation, and adsorption are elaborated. Amongst these techniques, adsorption is one of the best-optimized techniques involving sustainable materials like biochars, which are cost-effective, highly efficient, and environmentally friendly adsorbents.

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Section: Defluorination Methodsmentioning

confidence: 99%

“…Reverse Osmosis (RO) as the name indicates works opposite of natural osmosis. It has become a viable option for supplying the public with clean drinking water [24]. This technique removes fluoride more than 90% and provides steady water quality; however, it is expensive and even removes some important ions from our bodies.…”

Section: Membrane Filtrationmentioning

confidence: 99%

Remediation Techniques Used for Removal of Fluoride from Groundwater: A Concise Review

Kashyap,

Kaushal,

Rani

2023

J. Phys.: Conf. Ser.

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“…Hence, the safeguarding of fluoride is the finest remedy. The frequently explored removal methods like biological process, ion-exchange, adsorption, reverse osmosis and precipitation [3][4][5][6][7] are researched with the environmental researchers towards defluoridation wherein adsorption method is the finest method due to its simplicity, easy operation and economical one [8].Recently several adsorbents material namely metal oxides, activated alumina, zeolite, polymeric material, activated carbon, clay materials, etc., [9][10][11][12][13] were reported towards fluoride removal and these materials have some limitations such as poor selectivity, low surface area and low adsorption capacity [14].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Multi-functionalized Graphene Oxide Doped Alginate Hybrid Spheres for Enhanced Fluoride Adsorption

Jeyaseelan

Viswanathan

Naushad

et al. 2021

J Inorg Organomet Polym

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In this present investigation, amine functionalized graphene oxide (AGO) doped on alginate (Alg) polymeric matrix gives AGO@Alg hybrid spheres was developed to explore its potential towards fluoride retention. The vital characterization techniques namely FTIR, TGA, SEM and XPS analysis of AGO@Alg hybrid spheres were acquired to identify its physicochemical properties. The liable parameters for fluoride adsorption onto AGO@Alg hybrid spheres were optimized in a batch mode to attain enhance defluoridation capacity (DC).The prepared AGO@Alg hybrid spheres follow the electrostatic interaction mechanism on defluoridation. The adsorption isotherms (Fruendlich, Langmuir, Temkin and Dubinin-Radushkevich (D-R) models), kinetics (reaction and diffusion based models) and thermodynamic parameters (ΔS°, ΔG° and ΔH°) were surveyed at 303, 313 and 323 K. To lessen the costeffectiveness of AGO@Alg hybrid spheres the recyclability test was conducted. The aptness of AGO@Alg hybrid spheres was also scrutinized for the fluoride contaminated field sample collected from fluoride endemic village.

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“…Other methods of water treatment techniques include reverse osmosis, chemical precipitation, catalytic reduction, ion exchange, electrodialysis and membrane filtration. However, most of these methods are practically expensive, result in the wastage of water, are singly less efficient, are highly specific and have the problem of membrane fouling [ 29 , 30 , 31 , 32 , 33 ]. The development of an all-inclusive water detoxifier is a major challenge in the water industry.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Magnetic Oxide Nanoparticle (MNP) Core-Shell: Review of Synthesis, Structural Studies and Application for Wastewater Treatment

Nnadozie

Ajibade

2020

Molecules

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The demand for water is predicted to increase significantly over the coming decades; thus, there is a need to develop an inclusive wastewater decontaminator for the effective management and conservation of water. Magnetic oxide nanocomposites have great potentials as global and novel remediators for wastewater treatment, with robust environmental and economic gains. Environment-responsive nanocomposites would offer wide flexibility to harvest and utilize massive untapped natural energy sources to drive a green economy in tandem with the United Nations Sustainable Development Goals. Recent attempts to engineer smart magnetic oxide nanocomposites for wastewater treatment has been reported by several researchers. However, the magnetic properties of superparamagnetic nanocomposite materials and their adsorption properties nexus as fundamental to the design of recyclable nanomaterials are desirable for industrial application. The potentials of facile magnetic recovery, ease of functionalization, reusability, solar responsiveness, biocompatibility and ergonomic design promote the application of magnetic oxide nanocomposites in wastewater treatment. The review makes a holistic attempt to explore magnetic oxide nanocomposites for wastewater treatment; futuristic smart magnetic oxides as an elixir to global water scarcity is expounded. Desirable adsorption parameters and properties of magnetic oxides nanocomposites are explored while considering their fate in biological and environmental media.

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Defluoridation of reject water from a reverse osmosis unit and synthetic water using adsorption

Cited by 20 publications

References 49 publications

Remediation Techniques Used for Removal of Fluoride from Groundwater: A Concise Review

Remediation Techniques Used for Removal of Fluoride from Groundwater: A Concise Review

Fabrication of Multi-functionalized Graphene Oxide Doped Alginate Hybrid Spheres for Enhanced Fluoride Adsorption

Multifunctional Magnetic Oxide Nanoparticle (MNP) Core-Shell: Review of Synthesis, Structural Studies and Application for Wastewater Treatment

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