Quantification of chloride and iron in sugar factory effluent using long period fiber grating chemical sensor

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

doi:10.1016/j.snb.2017.11.139

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…The detection and monitoring of chloride ion (Cl − ) concentration plays an important role in several aspects, including human health [130][131][132], industrial process control [133], wasted water management [134], drinking water quality control [135,136], and corrosion forecasting of RCS [137][138][139]. There are several available methods for measuring Cl − concentration, including electrochemical sensors, OFS [28,140], and Bragg's grating [141,142].…”

Section: Ofs For Chloride Ions Detectionmentioning

confidence: 99%

Sol-Gel Coating Membranes for Optical Fiber Sensors for Concrete Structures Monitoring

et al. 2021

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The use of advanced sensing devices for concrete and reinforced concrete structures (RCS) is considered a rational approach for the assessment of repair options and scheduling of inspection and maintenance strategies. The immediate benefits are cost reduction and a reliable prevention of unpredictable events. The use of optical fiber sensors (OFS) for such purposes has increased considerably in the last few years due to their intrinsic advantages. In most of the OFS, the chemical transducer consists of immobilized chemical reagents placed in the sensing region of the optical sensor by direct deposition or by encapsulation in a polymeric matrix. The choice of the support matrix impacts directly on the performance of the OFS. In the last two decades, the development of OFS functionalized with organic–inorganic hybrid (OIH) sol–gel membranes have been reported. Sol–gel route is considered a simple method that offers several advantages when compared to traditional synthesis processes, allowing to obtain versatile materials with unique chemical and physical properties, and is particularly valuable in the design of OIH materials. This review will provide an update of the current state-of-the-art of the OFS based on OIH sol-gel materials for concrete and RCS since 2016 until mid-2021. The main achievements in the synthesis of OIH membranes for deposition on OFS will be discussed. The challenges and future directions in this field will also be considered, as well as the main limitations of OFS for RCS monitoring.

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Section: Ofs For Chloride Ions Detectionmentioning

confidence: 99%

Sol-Gel Coating Membranes for Optical Fiber Sensors for Concrete Structures Monitoring

et al. 2021

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“…For these reasons, the control of parameters affecting corrosion, including chloride concentration, could allow the early detection of future problems and the planning of corrective actions to ensure the suitability and durability of devices, systems, and infrastructures [ 10 ]. Nowadays, the quantification of chloride ions can be performed with many different devices, such as optical fibre sensors [ 12 , 13 ], fibre grafting sensors [ 14 , 15 ], and electrochemical sensors [ 6 ]. The latter ones are of particular interest in analytical research for many different applications, including not only the realization of wearable health devices [ 16 , 17 , 18 , 19 , 20 ], but also soil and water quality control [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Potentiometric Sensor for Chloride Measurement in Continuous Industrial Process Control

et al. 2022

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Recently, the new updates in legislation about drinking water control and human health have increased the demand for novel electrochemical low-cost sensors, such as potentiometric ones. Nowadays, the determination of chloride ion in aqueous solutions has attracted great attention in several fields, from industrial processes to drinking water control. Indeed, chloride plays a crucial role in corrosion, also influencing the final taste of beverages, especially coffee. The main goal is to obtain devices suitable for continuous and real-time analysis. For these reasons, we investigated the possibility to develop an easy, low-cost potentiometric chloride sensor, able to perform analysis in aqueous mediums for long immersion time and reducing the need of periodic calibration. We realized a chloride ion selective electrode made of Ag/AgCl sintered pellet and we tested its response in model solutions compatible with drinking water. The sensor was able to produce a stable, reproducible, and accurate quantification of chloride in 900 s, without the need for a preliminary calibration test. This opens the route to potential applications of this sensor in continuous, in situ, and real time measurement of chloride ions in industrial processes, with a reduced need for periodic maintenance.

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“…Sensors based on long-period fiber gratings (LPFGs) have been used in the determination of several chemical and physical parameters in multiple harsh environments [2,3,4]. This type of sensors makes use of light coupling between the fundamental core mode with co-propagating cladding modes.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Interrogation System for Long-Period Fiber Gratings Applied to Remote Sensing

Santos

Jorge

Almeida

et al. 2019

Sensors

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We present a portable and low-cost system for interrogation of long-period fiber gratings (LPFGs) costing around a 30th of the price of a typical setup using an optical spectrum analyzer and a broadband light source. The unit is capable of performing real-time monitoring or as a stand-alone data-logger. The proposed technique uses three thermally modulated fiber-coupled laser diodes, sweeping a few nanometers around their central wavelength. The light signal is then modulated by the LPFG and its intensity is acquired by a single photo-detector. Through curve-fitting algorithms the sensor transmission spectrum is reconstructed. Testing and validation were accomplished by inducing variations in the spectral features of an LPFG through changes either in external air temperature from 22 to 425 °C or in refractive index (RI) of the surrounding medium from 1.3000 to 1.4240. A dynamic resolution between 3.5 and 1.9 °C was achieved, in temperatures from 125 to 325 °C. In RI measurements, maximum wavelength and optical power deviations of 2.75 nm and 2.86 dB, respectively, were obtained in the range from 1530 to 1570 nm. The worse RI resolution obtained was 3.47 × 10 − 3 . The interrogation platform was then applied in the detection of iron corrosion, expressing wavelength peak values within 1.12 nm from the real value in the region between 1530 and 1570 nm.

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Quantification of chloride and iron in sugar factory effluent using long period fiber grating chemical sensor

Cited by 12 publications

References 19 publications

Sol-Gel Coating Membranes for Optical Fiber Sensors for Concrete Structures Monitoring

Sol-Gel Coating Membranes for Optical Fiber Sensors for Concrete Structures Monitoring

Low-Cost Potentiometric Sensor for Chloride Measurement in Continuous Industrial Process Control

Low-Cost Interrogation System for Long-Period Fiber Gratings Applied to Remote Sensing

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