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Application of artificial intelligence in modeling of nitrate removal process using zero-valent iron nanoparticles-loaded carboxymethyl cellulose

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Abstract

This study explores nitrate reduction in aqueous solutions using carboxymethyl cellulose loaded with zero-valent iron nanoparticles (Fe0-CMC). The structures of this nano-composite were characterized using various techniques. Based on the characterization results, the specific surface area of Fe0-CMC measured by the Brunauer–Emmett–Teller analysis were 39.6 m2/g. In addition, Scanning Electron Microscopy images displayed that spherical nano zero-valent iron particles (nZVI) with an average particle diameter of 80 nm are surrounded by carboxymethyl cellulose and no noticeable aggregates were detected. Batch experiments assessed Fe0-CMC’s effectiveness in nitrate removal under diverse conditions including different adsorbent dosages (Cs, 2–10 mg/L), contact time (t, 10–1440 min), initial pH (pHi, 2–10), temperature (T, 10–55 °C), and initial concentration of nitrate (C0, 10–500 mg/L). Results indicated decreased removal with higher initial pHi and C0, while increased Cs and T enhanced removal. The study of nitrate removal mechanism by Fe0-CMC revealed that the redox reaction between immobilized nZVI on the CMC surface and nitrate ions was responsible for nitrate removal, and the main product of this reaction was ammonium, which was subsequently completely removed by the synthesized nanocomposite. In addition, a stable deviation quantum particle swarm optimization algorithm (SD-QPSO) and a least square error method were employed to train the ANFIS parameters. To demonstrate model performance, a quadratic polynomial function was proposed to display the performance of the SD-QPSO algorithm in which the constant parameters were optimized through the SD-QPSO algorithm. Sensitivity analysis was conducted on the proposed quadratic polynomial function by adding a constant deviation and removing each input using two different strategies. According to the sensitivity analysis, the predicted removal efficiency was most sensitive to changes in pHi, followed by Cs, T, C0, and t. The obtained results underscore the potential of the ANFIS model (R2 = 0.99803, RMSE = 0.9888), and polynomial function (R2 = 0.998256, RMSE = 1.7532) as accurate and efficient alternatives to time-consuming laboratory measurements for assessing nitrate removal efficiency. These models can offer rapid insights and predictions regarding the impact of various factors on the process, saving both time and resources.

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Data availability

The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

  1. Agricultural Engineering Research Institute (AERI), Agricultural Research, Education and Extension Organization (AREEO), P.O. Box 31585-845, Karaj, Iran

    Saloome Sepehri & Jalal Javadi Moghaddam

  2. Department of Soil Science and Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

    Sima Abdoli

  3. Faculty of Agriculture, Dalhousie University, PO Box 550, Truro, NS, B2N 5E3, Canada

    Behnam Asgari Lajayer, Weixi Shu & G. W. Price

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  1. Saloome Sepehri
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  2. Jalal Javadi Moghaddam
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S.S., M.C., J.J.M., S.A., and B.A.L: Conceptualization, Methodology, Writing—original draft, Writing—review & editing. W.S. and G.W.P.: Conceptualization, Methodology, Writing—review & editing.

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Sepehri, S., Javadi Moghaddam, J., Abdoli, S. et al. Application of artificial intelligence in modeling of nitrate removal process using zero-valent iron nanoparticles-loaded carboxymethyl cellulose. Environ Geochem Health 46, 262 (2024). https://doi.org/10.1007/s10653-024-02089-x

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