Selective and Fast Responsive Sensitized Micelle for Detection of Fluoride Level in Drinking Water

Abstract

Consumption of excess fluorides through drinking water and its adverse effects on human health is of global concern. Given that people from at least 25 countries are suffering from fluorosis, global management of this issue is of immense importance. Here, we developed a sensor called FeFlu, based on an anionic micelle (SDS)−hematoporphyrin (Hp) complex, sensitized by Fe(III) chloride for the detection of fluoride in water. The micelle−hematoporphyrin (SDS−Hp) complex is almost nonfluorescent, but the prototype (FeFlu device) based on it displays a strong turn-on fluorescence upon recognition of F − in water. In addition, the detection of fluorides using FeFlu is found to suffer insignificant interference from environmentally relevant anions and cations. In the present study, we also fabricated a fluorescence-based prototype FeFlu device based on photophysical investigation of several sensitized micelle−Hp complexes and validated the results with a fluoride-ion-selective electrode, which is widely utilized for the detection of fluorides in drinking water in an easy and affordable manner.

Highly Sensitive Optical Sensor for Selective Detection of Fluoride Level in Drinking Water: Methodology to Fabrication of Prototype Device

“…Along with this, the association constant ( K ) is obtained to be 3.64 × 10 5 M –1 , which is close to the calculated Stern–Volmer constant ( K SV ). Therefore, it can be concluded that the static quenching mechanism due to the formation of the nonemissive complex in between fluoride and dye molecules is responsible for the decrease of absorbance as well as fluorescence intensity …”

“…Therefore, it can be concluded that the static quenching mechanism due to the formation of non-emissive complex in between fluoride and dye molecules is responsible for the decrease of absorbance as well as fluorescence intensity. 44…”

Host‐Assisted Delivery of a Model Drug to Genomic DNA: Key Information from Ultrafast Spectroscopy and in silico Study

“…In the above equation, F 0 , F and F ∞ are the fluorescence intensities of TB in the absence and in the presence of an intermediate and large concentration of SDS and K is the association constant [24] . It is to be noted that, due to two different kinds of interaction displayed by TB in different micellar stages, two different equations have been used to determine the association constant of TB to the pre micellar (>8 mM) and the micellar stage (8 mM) of SDS.…”

“…In the above equation, F 0 , F and F ∞ are the fluorescence intensities of TB in the absence and in the presence of an intermediate and large concentration of SDS and K is the association constant. [24] It is to be noted that, due to two different kinds of interaction displayed by TB in different micellar stages, two different equations have been used to determine the association constant of TB to the pre micellar (> 8 mM) and the micellar stage (8 mM) of SDS. For the interaction of TB with SDS in the pre micellar stage, the intensity gradually decreases due to the formation of ion-pair complex (Figure 1) where the nonradiative process of electron transfer from TB to micelle is predominant.…”

Development of an integrating coagulation and reverse osmosis system to treat highly turbid water using synthesized coagulants

“…Other limitations include high maintenance cost, large space requirements, and residual aluminum concentrations in the treated water. High aluminum concentrations in water have been associated with Alzheimer's disease and other carcinogenic effects in humans (Halder et al 2019;Singh Solanki et al 2019). Furthermore, Poly aluminum chloride was used to treat the turbid water to overcome alum-associated challenges.…”