Compact fluidic electrochemical sensor platform for on-line monitoring of chemical oxygen demand in urban wastewater

Duan, Wenchao; Gunes, M.; Baldi, Antonio; Gich, Martí; Fernández‐Sánchez, César

doi:10.1016/j.cej.2022.137837

Cited by 14 publications

(7 citation statements)

References 31 publications

(62 reference statements)

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“…With the slow kinetics of its thermal decomposition and a higher pyrolytic temperature, the formation of sp 2 structure could be favored . Graphite-like sp 2 bonds improve the electrical transport properties of the material, , resulting in an enhanced electrochemical performance. , Indeed, the electrodes prepared from the wood wastes with the lowest hemicellulose content show the best electrochemical response considering the measurements carried out with the representative redox species shown above. The K app 0 values obtained with the CPE_C c (Table ) are almost two times larger than those obtained with the commercial graphite powder, which were 220 ± 60 × 10 –4 cm s –1 for ferrocene and 15 ± 3 × 10 –4 cm s –1 for ferricyanide.…”

Section: Resultsmentioning

confidence: 99%

Unlocking the Potential of Wood Residues for Producing Screen-Printed Electrochemical Sensors

Duan,

González,

Gich

et al. 2024

ACS Sustainable Chem. Eng.

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Biomass residues from forestry and wood manufacturing contain a high percentage of carbohydrates that can be upcycled to manufacture carbon-based materials of high added value in the context of the circular bioeconomy. This work reports the upscaling of pine, chestnut, and oak wood residues into functional conductive carbon materials applied to the manufacturing of electrochemical sensors. Studies carried out by thermogravimetry, Raman spectroscopy, nitrogen adsorption, and electrochemical measurements revealed a clear correlation between the biomass structure and the electrochemical performance of the resulting carbon material structure. The electrochemical response of the produced carbons appeared to be negatively affected by the wood hemicellulose content but positively correlated with the content of cellulose and lignin. Of the three tested wood wastes, chestnut-derived carbon exhibits the best electrochemical performance, being thus selected as the feedstock to fabricate screen-printed electrochemical devices. Batches of 120 screen-printed devices were prepared from 20 mL of carbon ink obtained from 60 g of chestnut wood wastes. The analytical performance of the fabricated devices was thoroughly assessed in solutions containing representative redox species. Then, devices were applied to the detection of heavy metals by well-known anodic stripping voltammetric detection schemes based on the electrodeposition of Bi or Sb onto the electrode surface. Some real water samples were analyzed in the lab, and the values obtained with the screen-printed device sensors are in good agreement with the reference values, within the error limits. These results demonstrate the potential of applying wood residue-derived carbon materials for the manufacturing of electrochemical sensor devices, looking at reducing the carbon footprint of these widespread analytical tools.

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Section: Resultsmentioning

confidence: 99%

Unlocking the Potential of Wood Residues for Producing Screen-Printed Electrochemical Sensors

Duan,

González,

Gich

et al. 2024

ACS Sustainable Chem. Eng.

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“…For instance, Duan et al [146] have developed a thin-film electrochemical sensor by incorporating a copper nanoparticle (Cu-NP)-modified carbon-silica (C/SiO 2 ) for online COD measurement of the MWWTPs influent. The acceptable performance of the proposed electrochemical sensor was approved by comparing measured values using the sensor with COD readings from the dichromate standard method.…”

Section: Hardware Sensorsmentioning

confidence: 99%

Dynamic Modelling, Process Control, and Monitoring of Selected Biological and Advanced Oxidation Processes for Wastewater Treatment: A Review of Recent Developments

Parsa,

Dhib,

Mehrvar

2024

Bioengineering

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This review emphasizes the significance of formulating control strategies for biological and advanced oxidation process (AOP)-based wastewater treatment systems. The aim is to guarantee that the effluent quality continuously aligns with environmental regulations while operating costs are minimized. It highlights the significance of understanding the dynamic behaviour of the process in developing effective control schemes. The most common process control strategies in wastewater treatment plants (WWTPs) are explained and listed. It is emphasized that the proper control scheme should be selected based on the process dynamic behaviour and control goal. This study further discusses the challenges associated with the control of wastewater treatment processes, including inadequacies in developed models, the limitations of most control strategies to the simulation stage, the imperative requirement for real-time data, and the financial and technical intricacies associated with implementing advanced controller hardware. It is discussed that the necessity of the availability of real-time data to achieve reliable control can be achieved by implementing proper, accurate hardware sensors in suitable locations of the process or by developing and implementing soft sensors. This study recommends further investigation on available actuators and the criteria for choosing the most appropriate one to achieve robust and reliable control in WWTPs, especially for biological and AOP-based treatment approaches.

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“…There is research on the production of electrochemical sensors based on tin oxide [114][115][116][117][118][119]. In these works, electrochemical sensors are used to detect various harmful substances.…”

Section: Oxide Materials and Materials Based On Themmentioning

confidence: 99%

Sol-Gel Materials for Electrochemical Applications: Recent Advances

2022

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This review article emphases on the modern approaches to the types of sol-gel materials that are beneficial for electrochemistry, monitored by a report of recent advances in the numerous fields of sol-gel electrochemistry. Modified electrodes for sensors and supercapacitors as well as anti-corrosion are described. Sol-gel synthesis expands the capabilities of technologists to obtain highly porous, homogeneous, and hybrid thin-film materials for supercapacitor electrode application. The widespread materials are transition metal oxides, but due to their low conductivity, they greatly impede the rate capability of electrochemical supercapacitors. The way to optimize their properties is the production of complex oxides or different composites. Among the new materials, a special place is occupied by perovskites and materials with an olivine-type structure, which can be easily obtained by the sol-gel method. The sol-gel coating process has demonstrated excellent chemical stability to advance the corrosion resistance of the various metal alloy substrates. Furthermore, the sol-gel process is a user-friendly technique for applying a hybrid sol-gel coating to provide corrosion resistance. The hybrid sol-gel coating technique is the most attractive, easy to prepare at a lower temperature, and has shown the potential to swap Cr-based coatings. The hybrid sol-gel coating has exhibited promising properties of adherent and uses chemically inert to enhance the corrosion resistance of the metal and alloys. Hence, this review article emphases on the recent advances and approaches in the sol-gel coating processes that influence the belongings of its hybrid sol-gel coating for protecting metal substrates and their alloys from corrosion. In addition, the author discusses the current problem and challenges of hybrid anti-corrosion sol-gel coatings. Metal oxides and composites based on them are actively used to create electrochemical sensors. They synthesized, including the anhydrous and citrate sol-gel methods. Such materials are widely used as glucose biosensors and harmful gas sensors.

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Compact fluidic electrochemical sensor platform for on-line monitoring of chemical oxygen demand in urban wastewater

Cited by 14 publications

References 31 publications

Unlocking the Potential of Wood Residues for Producing Screen-Printed Electrochemical Sensors

Unlocking the Potential of Wood Residues for Producing Screen-Printed Electrochemical Sensors

Dynamic Modelling, Process Control, and Monitoring of Selected Biological and Advanced Oxidation Processes for Wastewater Treatment: A Review of Recent Developments

Sol-Gel Materials for Electrochemical Applications: Recent Advances

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