Deep Learning Neural Network Approach for Predicting the Sorption of Ionizable and Polar Organic Pollutants to a Wide Range of Carbonaceous Materials

• Published in: Environmental science & technology 2020-04, Vol.54 (7), p.4583-4591
• Main Authors: Sigmund, Gabriel, Gharasoo, Mehdi, Hüffer, Thorsten, Hofmann, Thilo
• Format: Article
• Language: English
• Subjects: Activated carbon; Carbon nanotubes; Carbonaceous materials; Charcoal; Contaminants; Deep learning; Drinking water; Fullerenes; Graphical user interface; Machine learning; Mathematical models; Nanotechnology; Nanotubes; Neural networks; Organic compounds; Parameters; Pollutants; Sorbents; Sorption; Wastewater pollution; Wastewater treatment; Water filtration; Water pollution; Water purification; Water treatment
• ISSN: 0013-936X; 1520-5851
• DOI: 10.1021/acs.est.9b06287

Most contaminants of emerging concern are polar and/or ionizable organic compounds, whose removal from engineered and environmental systems is difficult. Carbonaceous sorbents include activated carbon, biochar, fullerenes, and carbon nanotubes, with applications such as drinking water filtration, wastewater treatment, and contaminant remediation. Tools for predicting sorption of many emerging contaminants to these sorbents are lacking because existing models were developed for neutral compounds. A method to select the appropriate sorbent for a given contaminant based on the ability to predict sorption is required by researchers and practitioners alike. Here, we present a widely applicable deep learning neural network approach that excellently predicted the conventionally used Freundlich isotherm fitting parameters log K F and n (R 2 > 0.98 for log K F, and R 2 > 0.91 for n). The neural network models are based on parameters generally available for carbonaceous sorbents and/or parameters freely available from online databases. A freely accessible graphical user interface is provided.