Fluoride Toxicity and Recent Advances in Water Defluoridation with Specific Emphasis on Nanotechnology

Parashar, Kamya; Pillay, Kriveshini; Das, Ranajit; Maity, Arjun

doi:10.1007/978-3-030-04474-9_9

Cited by 3 publications

(3 citation statements)

References 134 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the natural geological sources are eventually responsible for reaching of fluoride to groundwater. Besides natural sources pharmaceuticals, cosmetics, effluents from fertilizers, metal processing units, semiconductors, and glass manufacturing factories are also contributing in reaching of fluoride to the surface water and groundwater [7]. Globally about more than 20 developed and developing nations like USA, Africa and Asia, where fluorosis became endemic, wherever China, Sri Lanka, India and Rift Valley countries of Africa are badly affected.…”

Section: Introductionmentioning

confidence: 99%

Removal of fluoride from an aqueous solution by batch and column process using activated carbon derived from iron infused Pisum sativum peel: characterization, Isotherm, kinetics study

Sahu

Bhan

Singh

2020

Environmental Engineering Research

View full text Add to dashboard Cite

The present study investigated the adsorption efficiency of magnetic activated carbon was synthesized by waste biomass of Pisum sativum (peel) and pyrolysis at 500˚C temperature (MPPAC-500). Derived activated carbon was applied for removal of fluoride from aqueous solution. The MPPAC-500 was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), zeta potential, X-ray Diffraction (XRD) and Particle Size Analyser. The fluoride sequestration study was performed in both batch and column systems. The batch adsorption study was focused on parameter like, adsorbent dose, contact time, pH and initial fluoride concentrations. The maximum capacity of fluoride removal was qo = 4.71 (mg/g). Freundlich isotherm model (R2 -0.995) obeyed better than Langmuir (R<sup>2</sup> -0.979) model. The RL values observed between 0-1 (RL-0.057) inferred the favourable adsorption. Pseudo-second-order model favoured well than pseudo-first-order in the whole experimental data. In case of column study was performed at two different bed height 5 cm and 10 cm having flow rate of 5 mL/min as well as 10 mL/min. The breakthrough curve and column data were interpreted by Thomas, Adams-Bohart, Yoon-Nelson and Clark model. These finding showed that MPPAC-500 has potential adsorptive capacity for fluoride removal from aqueous solutions in batch and column systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of fluoride from an aqueous solution by batch and column process using activated carbon derived from iron infused Pisum sativum peel: characterization, Isotherm, kinetics study

Sahu

Bhan

Singh

2020

Environmental Engineering Research

View full text Add to dashboard Cite

show abstract

“…Generally, nZVI is an ideal efficient material due to their excellent shorter remediation durations and low adsorbent dose requirements (Dhillon & Kumar, 2019). As a rule, nZVI has got their setbacks when considered for field applications (Parashar et al, 2019); this includes: (a)…”

Section: Efforts To Date (I) Nanoscale Attemptsmentioning

confidence: 99%

“…HCl, H2SO4, H3PO4, and HNO3 that otherwise would have modified desirable co-solute sat values. Fluoride contaminant of 23±2.0 mg/L was used based on groundwater average global scenario values (Parashar et al, 2019), where co-solutes were also assigned the same strength for simulating equimolar ligand influences (Heimann et al, 2018b).…”

Section: (Ii) Suitability Of the Approachmentioning

confidence: 99%

Investigation of metallic iron for water defluoridation

Lufingo

View full text Add to dashboard Cite

Fluorosis is a significant ailment that affects millions of humans and animals, especially in low income countries. It has been the focus of past and present scientific endeavours to research and develop efficient and deployable technologies, especially in these low-income communities. In this work, metallic Iron (Fe0 ) is a promising technology, and its filters have successfully addressed both safe drinking water and sanitation and are frugal. The recalled science of Fe0 filters is demonstrated with the lingering design investigations. This study aimed at the critical assessment on defluoridation efficiencies under conventional metallic iron aqueous systems; where at first, Fe0 materials were characterized with 1,10 Phenanthroline (Phen) in aqueous condition, and later batch studies were realized at the laboratory scale for two days under varied experimental conditions of: (a) 0.1 g and 1.0 g of iron mass, (b) Equimolar contamination, 23±2.0 mg/L, of co-solutes, i.e. NO3, PO4, SO4, HCO3, Cl, (c) Initial pH values of 4.5, 7.0 and 9.5, and (d) Disturbed and non-disturbed treatments. Characterization results proved the potential of 1,10-Phenanthroline as a sole Fe0 novel and facile characterization method. Defluoridation results revealed a maximum of 94% and 47% for quantitative (involving co precipitation, adsorption and occasionally size-exclusion remediations) and non-quantitative (associated with adsorption as major remediation means) fluoride removal efficiencies, respectively. Thus, a conventional metallic iron aqueous system requires incorporating suggested nano-scale practices towards enhancing efficiency for affordable defluoridation achievements in future continuous system designs.

show abstract

Occurance, Toxicity, Impacts and Removal Technologies of Fluoride ions in Drinking Water

Laxmi

Singh

Hussain³

et al. 2022

Asian J. Chem.

View full text Add to dashboard Cite

One of the most prevalent pollutants of ground water is fluoride. India is among the 23 nations around the globe where health problems occur due to excess ingestion of fluoride (> 1.5 mg/L) by drinking water. The presence of fluoride in exceeding limits (> 1.5 mg/L) and its related problems of drinking water prevailing in many parts of India is well documented. Consumption of fluoride couldn’t be avoided because a large section of groundwater is contaminated from it, which results in fluorosis of all the living forms. A number of defluoridation techniques are prevalent. Some of them could be used in day-to-day life for fluoride removal in drinking water. The review article presents the current information on fluoride in environment and its effects on human health and available methods of defluoridation.

show abstract

Fluoride Toxicity and Recent Advances in Water Defluoridation with Specific Emphasis on Nanotechnology

Cited by 3 publications

References 134 publications

Removal of fluoride from an aqueous solution by batch and column process using activated carbon derived from iron infused Pisum sativum peel: characterization, Isotherm, kinetics study

Removal of fluoride from an aqueous solution by batch and column process using activated carbon derived from iron infused Pisum sativum peel: characterization, Isotherm, kinetics study

Investigation of metallic iron for water defluoridation

Occurance, Toxicity, Impacts and Removal Technologies of Fluoride ions in Drinking Water

Contact Info

Product

Resources

About