Fluoride contamination sensor based on optical fiber grating technology

Jadhav, Mangesh S.; Laxmeshwar, Lata S.; Akki, Jyoti F.; Raikar, Prasad; Kumar, Jitendra; Prakash, Om; Raikar, U. S.

doi:10.1016/j.yofte.2017.09.014

Cited by 17 publications

(9 citation statements)

References 22 publications

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“…Using multiple tracking Fresnel lenses, the sunlight is collected and concentrated on the inlet end of the quartz glass optical fiber that transports the light. Then, using a range of custom-designed luminaire-like elements, light is distributed [72][73][74]. The acrylic dome covering the lenses is used to screen out 'ultraviolet' rays and hence, it does not damage fibers.…”

Section: Himawari Systemmentioning

confidence: 99%

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A Review of the Evolution of Daylighting Applications and Systems Over Time for Green Buildings

Gaber

Abdelrahman

Aissa

et al. 2023

International Journal of Applied Energy Systems

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The continuous increase in the world's population and the fact that humans spend most of their day in indoor environments has increased the demand for energy. The rational consumption of electricity, especially lighting and its provision in buildings using various strategies, has become an important topic on the minds of many researchers and developers. In recent years, with the increasing the awareness of sustainable development due to economic and social conditions, daylight is seen as an effective way to save the energy, reduce significant pressures on existing energy infrastructure and reduce the environmental impact. The use of daylight in buildings by different sunlight applications/systems, whether traditional or innovative, is more than just an alternative or supplement to electric lighting, as it has many benefits in terms of economic, environmental, and health. Traditional applications are divided into three strategies: general, improving, and developing. The interior spaces of multi-story buildings (i.e., taller and deeper) are often not illuminated by natural light during the daytime, due to the distance from these spaces to the nearest traditional general application through which daylight must enter. Innovative Daylighting Systems (IDS) or remote source systems have been developed to transmit daylight into the building core (i.e., inaccessible places or rooms) and windowless areas or parts so they can be called Structure Core Daylighting Systems (SCDS). Eighteen SCDS/IDS were reviewed and discussed in the form of a comparison between them in terms of their components, historical progress, installation locations, and a brief description. The study focused on the systems that had already been commercialized or at least produced a large-scale prototype that had been installed in a real structure over the past five decades. Although SCDS/IDS are technically powerful enough to provide illumination for remote spaces, there are some important shortcomings that have hampered or prevented their widespread use, such as the extremely high-cost, efficiency for some of them, utilization difficulties, and application limitations. In addition, the equilibrium between the cost of their components and their performance efficiency is one of the great fundamental decisions that an engineer designing for these systems must make. Finally, the paper presents the latest design approaches that have been developed to overcome their identified shortcomings.

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Section: Himawari Systemmentioning

confidence: 99%

“…It is one of the most costly SCDS, and no wonder then that the ideology of the manufacturer finds the "Heliobus light-pipes very sophisticated objects and built for images and PR reasons, more than for daylight illuminations. It's like a sort of daylight art [74,88]."…”

Section: Heliobus Systemmentioning

confidence: 99%

A Review of the Evolution of Daylighting Applications and Systems Over Time for Green Buildings

Gaber

Abdelrahman

Aissa

et al. 2023

International Journal of Applied Energy Systems

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“…Fluorine, the thirteenth most prevalent element, is often found in the earth's crust at a concentration of roughly 0.3 g/kg [1][2][3][4]. Fluorine is obtained geologically from fluorinebearing minerals such as fluorite (CaF 2 ) (48.9% fluorine content), cryolite (Na 3 AlF 6 ), topaz…”

Section: Introductionmentioning

confidence: 99%

Knowledge Level and Consumption Behavior of Native Plants, Meats, and Drinking Waters with High Fluoride Concentrations about the Relation to the Potential Health Risk of Fluoride in Lamphun Province Thailand: A Case Study

et al. 2022

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Fluoride exposure from natural, agricultural, and industrial sources has harmed people living in fluoride-affected areas. Fluoride accumulates in the human body after being exposed to it through the food chain. The population consisted of 371 community health volunteers who were surveyed and chosen based on personal fluoride information. Only 39 residents were chosen to be interviewed and take part in the trial, which involved drinking fluoride-containing groundwater (>1.5 part per million: ppm) and urine testing that revealed urine fluoride level (>0.7 ppm). In addition, 47 biological samples and eight commercially bottled water specimens were examined. The information was gathered in four ways: (1) a questionnaire-based survey of fluoride knowledge, (2) food consumption behavior with locally grown vegetables, fruits, poultry, and meat, and commercially bottled water produced by groundwater in fluoride-affected areas, (3) a semi-food frequency questionnaire, and (4) fluoride content measurements using an ion-selective electrode. According to the analyses, the participants ranged in age from 51 to 60 years, with approximately 60.38% of them female and born and raised in polluted areas. The majority of subjects had a low level of fluoride knowledge (65.23%). The respondents’ primary source of drinking water (100.00%) was commercially bottled water; they chewed camellia sinensis 11.56% of the time (1 to 5 years) and they drank tea 9.16% of the time (during 1 to 5 years). Sus scrofa domesticus was responsible for the intake of vegetables and fruits, whereas Brassica chinensis, Jusl var para-chinensis (Bailey), and Tsen and Lee were responsible for the intake of poultry and animal flesh. They were all purchased at a local farm. The hazard quotient was greater than one, and the fluoride concentration (ppm) ranged between 75.00% (0.29–5.20), 57.14% (0.01–0.46), 88.89% (0.07–0.91), 100.00% (0.43–3.07), 100.00% (0.58–0.77), 42.86% (0.12–0.62 ppm.), 60.00% (0.11–1.44), and 33.33% (0.10–0.80) in drinking water, fruit, young and mature plants. Fluoride ingestion may pose a health concern. Under the 95th percentile condition, 74.47% consumed water with a high fluoride level, vegetables and fruits, and poultry and meats.

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“…Jadhav et al measure fluoride concentration based on the interaction of the evanescent field of an in-fiber Bragg grating with a test solution to which an unspecified reagent is added. The Bragg wavelength, measured with an optical spectrum analyzer, shifts in response to changes in fluoride concentration [41]. Xiong et al measure the concentration of fluoride using a photomultiplier tube positioned adjacent to an annular microfluidic channel, created by the space between concentric optical fiber and plastic tubing, containing the test mixed with a SPADNS reagent [42].…”

Section: Introductionmentioning

confidence: 99%

A simple method for detection of low concentrations of fluoride in drinking water

Moradi

Caws

Wild

et al. 2020

Sensors and Actuators A: Physical

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Fluoride contamination sensor based on optical fiber grating technology

Cited by 17 publications

References 22 publications

A Review of the Evolution of Daylighting Applications and Systems Over Time for Green Buildings

A Review of the Evolution of Daylighting Applications and Systems Over Time for Green Buildings

Knowledge Level and Consumption Behavior of Native Plants, Meats, and Drinking Waters with High Fluoride Concentrations about the Relation to the Potential Health Risk of Fluoride in Lamphun Province Thailand: A Case Study

A simple method for detection of low concentrations of fluoride in drinking water

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