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22 articles for “Fluoride concentrations”
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Long-Period Fiber Grating Sensor to Determine Fluoride Contamination in Water
Abstract: The spectral response of uniform long period fiber grating is analyzed theoretically considering fluoride contaminated water as its surrounding medium. The response is studied for fluoride concentration variations ranging from 1 to 20 ppm. Our analysis is based on the study of shift in resonance wavelength of the grating with change in effective refractive indices of cladding modes due to change in fluoride ion concentration in water. Results provide insight …
Published in Research & Reviews : Journal of Physics · Vol. 7, Issue 3, 2018 · pp. 36–43 Read article
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Influence of Acidic Naf-Hf Solution on Dental Minerals
Abstract: The effect of solutions of sodium fluoride in hydrofluoric acid on the fluoride-dental minerals reaction system was investigated. The fluoride concentration in each fluoride solution was kept at 1.23% as the fluoride concentration in the acidulated phosphate fluoride solution at pH 3. The acidic sodium fluoride-hydrofluoric acid solutions with different contents of sodium fluoride and hydrofluoric acid were prepared. These solutions were added to synthetic powder hydroxyapatite and calcium hydrogen …
Published in Research and Reviews: A Journal of Dentistry · Vol. 15, Issue 3, 2024 · pp. 27–37 Read article
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Understanding the Factors Responsible for Groundwater Contamination in Parts of Southwest Punjab, India
Abstract: Availability of fresh water in sufficient quantities is a major challenge as demand for groundwater resources has increased many folds for drinking, irrigation and industrial purposes in recent years. This study is significant as the groundwater resources are being exploited indiscriminately in Mansa district. This article presents the current scenario of groundwater quality and also emphasizes the factors and processes governing the geochemical nature of groundwater. Hydrochemical data suggests that …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 6, Issue 2, 2016 · pp. 7–23 Read article
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Biosorption of Fluoride from Aqueous Solution Using Ulva fasciata sp.: A Marine Green Algae
Abstract: Water is a useful and vital natural resource for sustaining life and environment that we have always thought to be available in abundance and free gift of nature. Enhanced industrial activity during recent decades has led to the discharge of unprecedented volumes of industrial waste water, which is a serious cause of environmental degradation. Excessive fluoride concentrations have been reported in ground waters of more than 20 developed and developing …
Published in Emerging Trends in Chemical Engineering · Vol. 4, Issue 2, 2017 · pp. 45–53 Read article
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Water Comparative Study of Water Quality
Abstract: Water quality plays a vital role in safeguarding human health, maintaining environmental balance, and supporting socio-economic progress. For drinking purposes, water must satisfy established physical and chemical criteria to minimize health hazards and ensure the efficient functioning of biological processes. This research focuses on a comparative assessment of drinking water quality by analyzing key parameters such as pH, Total Dissolved Solids (TDS), hardness, and fluoride levels in both tap water …
Published in Journal of Water Pollution & Purification Research · Vol. 13, Issue 1, 2026 · pp. 85–98 Read article
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Skeletal Fluorosis in Populace of Deoli Tehsil (Tonk District), Rajasthan, India
Abstract: ABSTRACT:Fluorosis is a slow, progressive, crippling malady, which affects every organ, tissue and cells in the body and results in health complaints having overlapping manifestations with several other diseases. Fluoride contents enter into the body by water, food, fluoride dust, air fumes, drugs, cosmetics, industrial fluoride and neighbourhood. The consumption of fluoride in high level of 1.5 ppm leads to cases of skeletal fluorosis. For this purpose, 130 samples were …
Published in Journal of Water Pollution & Purification Research · Vol. 4, Issue 3, 2017 · pp. 24–28 Read article
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Comparative study on defluoridation by adsorption using rice husk ash, tamarind seed powder and activated
Abstract: In the present study, the ability and suitability of low cost adsorbents such as rice husk ash (RHA), tamarind seed powder (TSP) to adsorb fluoride ions was investigated in jar test apparatus and results were compared with that of commercially available activated charcoal powder (ACP). The major parameters such as pH, concentration of F- ions, stirring rate, contact time and different adsorbent dosages were studied and optimized. The maximum removal …
Published in Recent Trends in Civil Engineering & Technology · Vol. 10, Issue 1, 2020 · pp. 25–32 Read article
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Flouride Contamination of Groundwaters of Two Punjab Districts and its Implications Hardev Singh Virk*
Abstract: Fluoride is one of the important micronutrient in humans which is required for strong teeth and bones. Groundwater with fluoride concentration above the permissible limit set by WHO, i.e. 1.5 mg/l (ppm), have been recorded in several parts of the world. Fluoride contamination is widespread, intensive and alarming in India as 14.5% of total fluoride deposits on the earth’s crust are found in India. Our investigations have revealed that out …
Published in OmniScience: A Multi-disciplinary Journal · Vol. 8, Issue 2, 2018 · pp. 25–31 Read article
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Calcareous Soil as a Promising Adsorbent to Remove Fluoride from Aqueous Solution: Equilibrium, Kinetic and Thermodynamic Study
Abstract: Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 In this work, the feasibility of employing calcareous soil to remove fluoride ions from its aqueous solutions was investigated under batch mode. The influence of solution pH, sorbent dose, initial fluoride concentration, contact time, stirring rate and temperature on the removal process were investigated. The equilibrium adsorption data were analyzed using Langmuir, Freundlich and Temkin isotherm models. The kinetics of fluoride …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 3, Issue 3, 2012 · pp. 1–21 Read article
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Sources and Health Effects of Arsenic, Fluoride, and Nitrate in Water
Abstract: Arsenic, fluoride, and nitrate are major inorganic contaminants in water that pose significant risks to human health. These contaminants are introduced into water sources through both natural geological processes and human activities. Arsenic is primarily released from arsenic-bearing minerals through weathering, dissolution, and erosion, while human activities such as agriculture, mining, and fossil fuel combustion further enhance its presence in water. Fluoride contamination mainly results from the dissolution of fluoride-bearing …
Published in Journal of Water Resource Engineering and Management · Vol. 13, Issue 2, 2026 · pp. 19–25 Read article
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Estimation of Excessive Addition of Fluoride in Dentifrices of Indian Market: The Present Status
Abstract: The addition of fluoride in dentifrices all over the world is done for the antibacterial and carries prevention. Drug Controller General of India (DCGI) has given a permissible limit for addition of fluoride in dentifrices 1000 ppm for adult and 500 ppm for children; as early as by G.O.I. Notification No. GSR 223(E) dated 19.4.1991. Besides, addition of the raw material also contain fluoride that leads further addition, which leads …
Published in Research and Reviews: A Journal of Pharmacology · Vol. 5, Issue 2, 2015 · pp. 5–10 Read article
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Defluoridation of Water using Corn Cobs Powder: An Effective Risk Reducing Agent
Abstract: The presence of a unique chemical called fluoride in water, has a major impact on human health. In many places, ground waters are the primary source of water and is found to be with high concentrations of fluorides. Most of the adsorbents used for the removal of fluoride from drinking water are activated carbon-based materials and is found to be most expensive. There is a need for an alternative, effective, …
Published in Journal of Water Resource Engineering and Management · Vol. 8, Issue 2, 2021 · pp. 25–34 Read article
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Ground Water Studies of Vijayagopalapuram Village, Prakasam District, Andhra Pradesh, India Using Geospatial Technology
Abstract: Vijayagopalapuram, a revenue village in Kanigiri mandal of Prakasam District, Andhra Pradesh, India is a severely drought affected area. This village lies between longitude 79°27'12" to 79°30 45" E and latitude 15°16'40" to 15°18'45" N with geographical area of 857 ha. The average annual rainfall of Kanigiri mandal is 813.4 mm. The main lithological units in the Vijayagopalapuram village include Quartz-Chlorite-Sericite (QCS) Schist and Quartzite (DQt) rocks. These rocks represent …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 10, Issue 1, 2021 · pp. 41–49 Read article
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Water Quality Testing of Yamuna River at Poiya Ghat (Vaikunth Dham/Swarg Dham), Agra: A Systems Study
Abstract: Since pre-historic times, river water has been used as a source of drinking water. River water is now a source of hydropower generation, irrigation, aquaculture, navigation, transportation, socioeconomic activities, human settlements and home for aquatic living forms. Apart from this, river water has very vital role in maintaining soil fertility, wildlife conservation and development of forest resources. Due to increase in industrialization, urbanization, mining, sewage disposal and rampant use of …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 15, Issue 3, 2024 · pp. 01–03 Read article
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Hybrid Polymer Nanocomposites with Enhanced Dielectric and Optical Properties for Wireless Communication Systems
Abstract: The incorporation of nanofillers into polymer matrices offers a promising approach to enhancing the multifunctional properties of composite materials. This study examines the effect of nanofiller concentration on the dielectric performance, mechanical strength, thermal stability, optical absorbance, and electromagnetic interference (EMI) shielding effectiveness of polyvinylidene fluoride (PVDF)-based nanocomposites. Titanium dioxide (TiO₂) and zinc oxide (ZnO) nanofillers were incorporated at varying concentrations to assess their influence on material properties. EMI shielding …
Published in Journal of Polymer & Composites · Vol. 13, Issue 5, 2025 · pp. 518–549 Read article
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Impact of Groundwater Pollution on Carcinogenic and Non-Carcinogenic Health Effects: A Review
Abstract: Groundwater is a critical source of drinking water in many regions worldwide, particularly in South and Southeast Asia, where dependence on untreated groundwater remains high. However, increasing groundwater contamination poses serious risks to human health. This review synthesizes recent peer-reviewed studies to examine the sources, distribution, and health impacts of major groundwater contaminants, with a focus on both carcinogenic and non-carcinogenic risks. Emphasis is placed on fluoride, nitrate, chromium, and …
Published in Research & Reviews : Journal of Ecology · Vol. 15, Issue 1, 2026 · pp. 40–46 Read article
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Fluorine Adsorbents in Water. A Compilation
Abstract: Fluorine constitutes 0.08% of the earth crust. This chemical element is found in the air, soil, rock, and water. Fluoride finds industrial application in the production of ceramics, pesticides, aerosol propellants, and refrigerants. Within the field of medicine, fluorides have been employed for several decades in the prevention of dental cavities. Scientific evidence affirms that fluoride is often harmful to health. Water is a very important vector of fluoride, which …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 14, Issue 2, 2023 · pp. 1–7 Read article
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Assessment of Physico-Chemical and Microbial Analyses of Hand Dug Wells in Makeni Town, Sierra Leone
Abstract: The various water samples were analysed for residual chlorine, ammonia, fluoride, nitrate, sulphite, lead, arsenic, chromium, and bicarbonate levels from January to August 2024. The bacteria contamination was investigated to determine the safety of the water for the consumption of human. The temperatures across the four wells ranged 27.3oC to 30.0oC, with and average values ranging from 27.94oC to 29.15oC. pH values were within the WHO recommended guidelines range of …
Published in International Journal of Pollution: Prevention & Control · Vol. 2, Issue 2, 2024 · pp. 01–13 Read article
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Smart Polymer Composites with Multifunctional Capabilities Integrating Electroactive Polymers Conductive Nanofillers and Flexible Electronics for Advanced Sensing and Actuation Systems
Abstract: Smart polymer composites have gained significant attention to their ability to integrate polymer matrices with conductive nanofillers, offering tunable electrical, mechanical, and electroactive properties. These composites are highly responsive to external stimuli such as electrical fields, mechanical stress, and temperature variations, making them ideal for applications in flexible electronics, soft robotics, and adaptive sensing systems. This research investigates the effect of nanofiller dispersion on the performance of polymer composites, optimizing …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 946–965 Read article
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Present Status of Hydrographical Variables of the Amirthi River in Amirthi Forest, Vellore
Abstract: ABSTRACTThe present study was carried out to determine the water quality in terms of physicochemical characteristics variables in the running water ecosystem for a period of three months from January to March 2007. The post-monsoon variation of hydrography variables and dissolved nutrients such as PO4-P, NO3-N, NO2-N, K, Mg and Ca were high at all the stations. In the running water, the Chloride (24 mgl−1 to 1733 mgl−1), Fluoride (0.2 …
Published in Research & Reviews : Journal of Ecology · Vol. 1, Issue 3, 2012 · pp. 1–7 Read article