Fluoride contamination in water: Remediation strategies through membranes

Gangani, Nikunj; Joshi, Vipin Chandra; Sharma, Saroj; Bhattacharya, Amit

doi:10.1016/j.gsd.2022.100751

Cited by 18 publications

(4 citation statements)

References 127 publications

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“…Although the preparation method of Panda et al's endows the surface of cotton fabric with excellent oil/water separation performance and stability, it is undeniable that this method is not friendly to the ecological environment because of the usage of fluorine in the preparation process. 45,46 In order to avoid the secondary pollution of the fluorine-doped oil/water separation materials to the environment, there are many articles describing the preparation method of fluorine-free oil/water separation cotton fabric. 47,48 It was presented in Figure 6A that Yu et al 49 developed an environmentally friendly and easy to produce strategy for preparing superhydrophobic/superoleophilic PEI/TM-SPA/SiO 2 /DTMS/Cotton for oil/water separation and oil absorption, in response to the harmful effects of fluorinated chemicals.…”

Section: Impregnation Methodsmentioning

confidence: 99%

“…More importantly, it had high oil/water separation efficiency for some oil–water mixtures (petroleum ether‐water, kerosene‐water, and benzene‐water), which could be higher than 96%. Although the preparation method of Panda et al's endows the surface of cotton fabric with excellent oil/water separation performance and stability, it is undeniable that this method is not friendly to the ecological environment because of the usage of fluorine in the preparation process 45,46 …”

Section: Super‐hydrophobic and Super‐lipophilic Cotton Fabricsmentioning

confidence: 99%

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Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

Meng,

Song,

Dong

et al. 2024

Polymers for Advanced Techs

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With the continuous development of the industry, oil spill accidents occur frequently. Oil/water separation materials are considered to be a major choice for the treatment of oily wastewater due to their flexible operation and low cost. Cotton fabrics are low‐cost and environmentally friendly, which are used as substrates to prepare oil/water separation materials with quite competitive in the market. A large number of oil/water separation cotton fabrics with excellent properties have been frequently reported in recent decades. On the other hand, since the service life of these oil/water separation cotton fabrics is closely related to the thin layer covered on the surface, so in order to improve the practical applicability, substances such as dopamine and plant polyphenols that improve the adhesion of the thin layer to the surface of the material are introduced into the preparation process of these materials. On this basis, the research progress of super‐hydrophobic cotton fabrics, super‐hydrophilic/underwater super‐oleophobic cotton fabrics, super durable oil/water separation cotton fabrics and intelligent response to oil/water separation fabric in recent years are reviewed, as well as their applications in the field of oil/water separation.

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Section: Impregnation Methodsmentioning

confidence: 99%

Section: Super‐hydrophobic and Super‐lipophilic Cotton Fabricsmentioning

confidence: 99%

Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

Meng,

Song,

Dong

et al. 2024

Polymers for Advanced Techs

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“…Membrane processes stand at the forefront of innovative solutions for tackling fluoride contamination in water, showcasing advanced methods in the realm of defluoridization. These processes, particularly Reverse Osmosis (RO) and Nanofiltration (NF), rely on selectively permeable membranes to separate fluoride ions and impurities from the water [10]. RO exerts pressure to propel water through a semi-permeable membrane, effectively barring the passage of fluoride, while NF operates with a slightly larger pore size, selectively removing fluoride while allowing certain ions and molecules to pass through.…”

Section: Membrane Processmentioning

confidence: 99%

A Comparative Study on the Removal of Fluorides from Groundwater: Strategies and Technologies

D. Valli Sowbhagyam,

K Rashi,

A. Renuka Devi

et al. 2024

Int Res J Adv Engg Mgt

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This study conducts a comprehensive comparative analysis of various strategies and technologies employed for the removal of fluorides from groundwater, addressing the increasing concern over elevated fluoride levels in water sources. High fluoride concentrations pose significant health risks, including dental and skeletal fluorosis, necessitating effective and sustainable removal methods. The research evaluates the efficiency, cost-effectiveness, and environmental impact of different fluoride removal techniques, providing valuable insights for water treatment practitioners, policymakers, and communities grappling with fluoride-contaminated groundwater. The study begins by outlining the prevalence of fluoride contamination in groundwater and the associated health risks, establishing the critical need for reliable removal methods. Subsequently, a review of existing literature presents an overview of conventional and emerging technologies utilized for fluoride removal. Conventional methods such as coagulation, precipitation, and adsorption are examined, considering their efficiency, operational ease, and cost implications. The study then delves into advanced technologies like membrane processes, ion exchange, and electrochemical methods, assessing their applicability and effectiveness in diverse groundwater contexts. Environmental sustainability is a key focus throughout the analysis, with a critical examination of the by-products and waste generated by each removal method. The ecological footprint, including energy consumption and material usage, is considered to provide a holistic understanding of the environmental impact associated with fluoride removal technologies. Furthermore, the economic feasibility of each method is evaluated, considering capital and operational costs. Comparative cost analyses offer insights into the affordability and scalability of different removal technologies, aiding decision-makers in selecting suitable methods based on financial constraints. The study concludes with a synthesized overview of the comparative analysis, emphasizing the strengths and limitations of each fluoride removal method. In summary, this comparative study contributes to the broader understanding of fluoride removal technologies, facilitating informed decision-making in addressing groundwater contamination. The findings are anticipated to inform researchers, water treatment professionals, and policymakers, guiding the selection of appropriate and context-specific fluoride removal methods to ensure safe and potable groundwater sources

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“…Water also plays an important role in many fields, particularly the industrial and agricultural sectors (Ferreira et al, 2022;Li, Huang, et al, 2022). Nowadays, water resources face issues of contamination by pollutants such as organic, inorganic, microbial, fertilizer and radioactive substances resulting from urbanization, modernization and dying industries (Bing et al, 2022;Gangani et al, 2022;Picetti et al, 2022;Zhou et al, 2021). Consequently, the preservation of water is becoming a great concern to avoid the harmful impacts of water pollution on soil, human health and the whole ecosystem (Liu et al, 2021;Loi et al, 2022;Some et al, 2021).This issue has been given the great interest by scientists and researchers (Tiller et al, 2021;.…”

Section: Introductionmentioning

confidence: 99%

Coal ash for removing toxic metals and phenolic contaminants from wastewater: A brief review

Labidi

Ren

Sial

et al. 2023

Critical Reviews in Environmental Science and Technology

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Over the past few years, population growth, industrial progress and climate change have led to water scarcity. Thus, water pollution caused by hazardous soluble and insoluble pollutants, such as toxic metals and phenolic compounds, has become an important problem that should be dealt with urgently. For instance, new methods have been introduced to convert low-cost raw materials (i.e. coal fly ash and coal bottom ash "wastes-to-resource") into suitable materials for new cleaner production to achieve sustainability goals in wastewater-containing toxic metals and phenolic compounds purification. Obviously, the functionalization of coal fly ash and bottom ash enhances the ability of coal ash-based entities as potential materials in wastewater remediation technologies. Here, we review the application of coal ashes, including coal bottom ash and fly ash-based materials for toxic metals and phenolic compounds removal. We also examine their structural properties and functionalization to enhance their affinities toward these pollutants in aqueous environment. Even though each process has its own benefits and limitations, coal ash-based materials appear promising for the removal of toxic metals and phenolic compounds using adsorption, membrane filtration, and photocatalysis. Overall, the study on the availability of coal fly ash and bottom ash for wastewater treatment have resulted in high removal efficiencies for toxic metals and phenolic compounds. In the future, new recycling methods for coal ashes as new water purification agents should be further studied and advanced processes should be investigated in order to achieve wastewater remediation purposes.

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Fluoride contamination in water: Remediation strategies through membranes

Cited by 18 publications

References 127 publications

Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

Recent progress of cotton fabric based on bio‐inspired modification for oil/water separation

A Comparative Study on the Removal of Fluorides from Groundwater: Strategies and Technologies

Coal ash for removing toxic metals and phenolic contaminants from wastewater: A brief review

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