CYANanobot: Miniaturized Boat-Assisted Data Acquisition for Automated Cyanide Monitoring in Wastewater Using Optical Nano-Sensors

Authors

  • J. S. Loquero CYANanobot Research Project, Caraga State University, Philippines
  • A. T. Demetillo College of Engineering and Information Technology, Caraga State University, Philippines
  • I. B. Pongcol CYANanobot Research Project, Caraga State University, Philippines
  • J. M. Sakuddin CYANanobot Research Project, Caraga State University, Philippines
  • R. N. Mendoza Center for Renewable Energy, Automation and Fabrication Technologies, Caraga State University, Philippines
  • G. L. Amper CYANanobot Research Project, Caraga State University, Philippines
  • R. J. U. Candare CYANanobot Research Project, Caraga State University, Philippines
  • Y. P. C. Amarga CYANanobot Research Project, Caraga State University, Philippines
  • R. Y. Capangpangan College of Science and Environment, Mindanao State University, Philippines
Volume: 12 | Issue: 4 | Pages: 8990-8995 | August 2022 | https://doi.org/10.48084/etasr.5063

Abstract

Cyanide contamination in water and wastewater is ubiquitous, particularly in gold mining industries, where cyanide is commonly used to extract gold. It is constantly being monitored by collecting samples which are analyzed in the laboratory using traditional cyanide analysis, which requires complicated instrumentation, skilled analysts, and expensive equipment. Using the gold nanoparticle (AuNP)-decorated paper-based sensor employing Whatman Filter Paper (WFP) as a substrate, an automated process for cyanide monitoring with the aid of an assembled and improvised remotely controlled miniature boat was developed. The technology is equipped with a filtration system with automated water sample collection and preparation with an automatic paper sensor dispenser. Images of the collected wastewater samples are taken at different time intervals and are analyzed on their respective color spaces based on 8 mathematical models, each predicting the cyanide level of the water sample. The predictions are compared to the actual Ion-Selective Electrode (ISE) measurement, and Root Mean Square Error (RMSE) values were calculated. The predictions at 165s using the Hue, Saturation, Value (HSV) color space exhibited the highest R2 of 0.85 and the lowest RMSE of 3.80 parts per million (ppm) with an average error of 3.40ppm. The predictions are sent to a database using Global System for Mobile Communications (GSM). The results suggest that the CYANanobot technology facilitates fast analysis time, circumvents the frequent instrument calibration, reduces operating costs, minimizes exposure to toxic cyanide-containing samples, and reduces person-to-person interaction.

Keywords:

Cyanide, Gold nanoparticle (AuNPs)-decorated paper-based sensor, Remote-controlled boat, Automated Cyanide Monitoring, Image Processing, GSM

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How to Cite

[1]
J. S. Loquero, “CYANanobot: Miniaturized Boat-Assisted Data Acquisition for Automated Cyanide Monitoring in Wastewater Using Optical Nano-Sensors”, Eng. Technol. Appl. Sci. Res., vol. 12, no. 4, pp. 8990–8995, Aug. 2022.

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