Tuomikoski, S, Runtti, H, Romar, H, Lassi, U, Kangas, T. Multiple heavy metal removal simultaneously by a biomass‐based porous carbon. Water Environ Res. 2021; 93(8): 1303-1314. https://doi.org/10.1002/wer.1514
Multiple heavy metal removal simultaneously by a biomass‐based porous carbon
|Author:||Tuomikoski, Sari1; Runtti, Hanna1; Romar, Henrik1;|
1Research Unit of Sustainable Chemistry, University of Oulu, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.3 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202102165071
John Wiley & Sons,
|Publish Date:|| 2021-02-16
Activated carbon from sawdust was produced with an environmentally friendly process involving single‐stage carbonization and activation with steam at 800°C. Production process is scalable because lignocellulosic biomass is ubiquitous worldwide as a waste or as a virgin material. Single‐stage production without any cooling steps between carbonization and activation is easier in larger scale production. Monometal adsorption and multimetal adsorption of cobalt, nickel, and zinc were investigated by using the produced carbon, with a commercial one as control. Effect of pH, initial metal concentration, adsorbent dosage, and adsorption time was evaluated in batch experiments. Multimetal experiments showed the order of the maximum adsorption capacities: zinc > nickel > cobalt. Experimental adsorption capacities were 17.2, 6.6, and 4.5 mg/g for zinc, nickel, and cobalt, respectively, in multisolute adsorption. In case of monometal adsorption, adsorption capacity was notably lower. Experimental data fitted into the single‐solute and multisolute Freundlich models. The best fit kinetic model varied among the metals. The Weber and Morris intraparticle diffusion model was used. Regeneration was performed with 0.1 M HNO₃, 0.1 M HCl, or 0.1 M H₂SO₄. The adsorption capacity remained at the same within three adsorption–desorption cycles.
Water environment research
|Pages:||1303 - 1314|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
This study was conducted under the auspices of the WaterPro project (ERDF project number: A74635, funded by the Central Ostrobothnia Regional Council, European Union, European Regional Development Fund and Leverage from the EU). The authors thank the exchange students Lena Vollert and Peggy Chan for their assistance in the laboratory experiments. Hanna Runtti thanks Maa‐ ja Vesitekniikan tuki ry for financial support.
© 2021 The Authors. Water Environment Research published by Wiley Periodicals LLC on behalf of Water Environment Federation. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.