Among the numerous clean-up techniques for water treatment, sorption methods are widely used for the removal of trace metals. Phragmites australis is a macrophyte commonly used in the constructed wetlands for water purification, and in the last decades its use as biosorbent has attracted increasing attention. In view of a circularly economy approach, in this study we investigated how to improve the removal of trace metals by recycling the biomass of P. australis colonizing a constructed wetland, which operates as post-treatment of effluent wastewater from an activated sludge plant serving the textile industrial district of Prato (Italy). After the annual mowing of the reed plants, the biomass was dried and blended to derive a sustainable and eco-friendly biosorbent and its sorption capacity for Fe, Cu and Zn was investigated comparing the batch system with the easier to handle column technique. The possibility of regeneration and reuse of the biosorbent was also evaluated. The biomaterial showed an interesting sorption capacity for Cu, Fe, and Zn, both in batch and in column experiments, especially for Fe ions. The immobilization of the biosorbent in column filters induced some improvement in the removal efficiency, and, in addition, this operation mode has the advantage of being much more suitable for practical applications than the batch process.

Closing the loop in a constructed wetland for the improvement of metal removal: the use of Phragmites australis biomass harvested from the system as biosorbent / Elisabetta Bianchi, Andrea Coppi, Simone Nucci, Alexandra Antal, Chiara Berardi, Ester Coppini, Donatella Fibbi, Massimo Del Bubba, Cristina Gonnelli, Ilaria Colzi. - In: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL. - ISSN 1614-7499. - ELETTRONICO. - 28:(2021), pp. 11444-11453. [10.1007/s11356-020-11291-0]

Closing the loop in a constructed wetland for the improvement of metal removal: the use of Phragmites australis biomass harvested from the system as biosorbent

Elisabetta Bianchi;Andrea Coppi;Alexandra Antal;Chiara Berardi;Donatella Fibbi;Massimo Del Bubba;Cristina Gonnelli;Ilaria Colzi
2021

Abstract

Among the numerous clean-up techniques for water treatment, sorption methods are widely used for the removal of trace metals. Phragmites australis is a macrophyte commonly used in the constructed wetlands for water purification, and in the last decades its use as biosorbent has attracted increasing attention. In view of a circularly economy approach, in this study we investigated how to improve the removal of trace metals by recycling the biomass of P. australis colonizing a constructed wetland, which operates as post-treatment of effluent wastewater from an activated sludge plant serving the textile industrial district of Prato (Italy). After the annual mowing of the reed plants, the biomass was dried and blended to derive a sustainable and eco-friendly biosorbent and its sorption capacity for Fe, Cu and Zn was investigated comparing the batch system with the easier to handle column technique. The possibility of regeneration and reuse of the biosorbent was also evaluated. The biomaterial showed an interesting sorption capacity for Cu, Fe, and Zn, both in batch and in column experiments, especially for Fe ions. The immobilization of the biosorbent in column filters induced some improvement in the removal efficiency, and, in addition, this operation mode has the advantage of being much more suitable for practical applications than the batch process.
2021
28
11444
11453
Goal 6: Clean water and sanitation
Goal 11: Sustainable cities and communities
Elisabetta Bianchi, Andrea Coppi, Simone Nucci, Alexandra Antal, Chiara Berardi, Ester Coppini, Donatella Fibbi, Massimo Del Bubba, Cristina Gonnelli, Ilaria Colzi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1212745
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