Bacteria functionalized gold nanoparticle matrix based fiber-optic sensor for monitoring heavy metal pollution in water

Halkare, Pallavi; Punjabi, Nirmal; Wangchuk, Jigme; Nair, Aswathy M.; Kondabagil, Kiran; Mukherji, Soumyo

doi:10.1016/j.snb.2018.10.119

Cited by 51 publications

(17 citation statements)

References 40 publications

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“…Penelitian tentang pendeteksian dan penyerapan ion logam berat telah banyak dilakukan. Metode yang paling banyak digunakan untuk mendeteksi ion logam berat adalah metode spektroskopi seperti spektroskopi emisi optik plasma induktif (ICP-OES), spektrometri massa plasma induktif, Sensor serat optik untuk deteksi ion logam berat telah dikembangkan dengan berbagai metode seperti reflektansi [4], [5], surface plasmon resonance (SPR) [6], [7] dan floresensi [8], [9].…”

Section: Abstrakunclassified

Fabrikasi Sensor Serat Optik Plastik Untuk Deteksi Ion Logam Merkuri Dalam Air

Vaeruza

Kurniansyah

Darma

et al. 2019

KFI

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The presence of mercury ions is a serious threat to human health and environment. Water consumption containing mercury is very dangerous for human healt. The purpose of this work is to design a heavy metal sensor ion using plastic optical fiber to detect mercury ions in water. The sensor was fabricated by coating the optical fiber by chitosan through dip-coating technique. There are three diameter of optical fiber sensor that was fabricated, which are 1087.64 μm (sensor A), 1691.64 μm (sensor B) and 1736.33 μm (sensor C). Sensor characterization was done by connected the tip of plastic optical fiber to an LED and the other tip was connected to a photodioda. The results show that sensitivity of sample A is 0.32 mA/ppm, sample B is 0.56 mA/ppm and sample C is 0.64 mA/ppm. In terms of respone time, it is shown that thr respon time for sensor A, B and C are 22 s, 42.5 s and 86 s respectively.

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Section: Abstrakunclassified

Fabrikasi Sensor Serat Optik Plastik Untuk Deteksi Ion Logam Merkuri Dalam Air

Vaeruza

Kurniansyah

Darma

et al. 2019

KFI

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“…Lately, Kopitzke and Geissinger [ 46 ] developed a novel optical fibre sensor array with the inclusion of a fluorescent compound for Cu and Zn detection which gives fast and accurate results (RSD 10%), with high sensitivity and selectivity (DL of sub-ppm). Further, Halkare et al [ 47 ] experimented with the integration of bacteria ( E. coli B40 ) on nanoparticles and obtained a fast response (10 min) with a much lower DL (0.5 ppb) for transitional metals, although the selectivity was only proven by comparing Cd and Hg, which are chemically quite different.…”

Section: Introductionmentioning

confidence: 99%

Microwave Sensors for In Situ Monitoring of Trace Metals in Polluted Water

Frau

Wylie

Byrne

et al. 2021

Sensors

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Thousands of pollutants are threatening our water supply, putting at risk human and environmental health. Between them, trace metals are of significant concern, due to their high toxicity at low concentrations. Abandoned mining areas are globally one of the major sources of toxic metals. Nowadays, no method can guarantee an immediate response for quantifying these pollutants. In this work, a novel technique based on microwave spectroscopy and planar sensors for in situ real-time monitoring of water quality is described. The sensors were developed to directly probe water samples, and in situ trial measurements were performed in freshwater in four polluted mining areas in the UK. Planar microwave sensors were able detect the water pollution level with an immediate response specifically depicted at three resonant peaks in the GHz range. To the authors’ best knowledge, this is the first time that planar microwave sensors were tested in situ, demonstrating the ability to use this method for classifying more and less polluted water using a multiple-peak approach.

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“…Localized surface plasmon resonance (LSPR), a unique characteristic of metal nanoparticles (Mnps) that arises due to the collective oscillations of free electrons in metals and their surrounding dielectric medium, has been extensively investigated in various applications such as in photocatalysis, 1,2 electrochemistry, 3,4 photovoltaics, 5,6 water-splitting, 7,8 light-emitting diodes, 9,10 sensing, 11,12 and plasmouidics. 13,14 In photovoltaic devices, the plasmonic Mnps induce a stronger near-eld coupling at the Mnps and semiconductor interface upon interaction with the incident light.…”

Section: Introductionmentioning

confidence: 99%