Multifunctional graphene oxide/biopolymer composite aerogels for microcontaminants removal from drinking water
Artikel i vetenskaplig tidskrift, 2020

Due to water depletion and increasing level of pollution from standard and emerging contaminants, the development of more efficient purification materials and technology for drinking water treatment is a crucial challenge to be addressed in the near future. Graphene oxide (GO) has been pointed as one of the most promising materials to build structure and devices for new adsorbents and filtration systems. Here, we analyzed two types of GO doped 3D chitosan-gelatin aerogels with GO sheets embedded in the bulk or deposited on the surface. Through combined structural characterization and adsorption tests on selected proxies of drinking water micropollutants, we compared both GO-embedded and GO-coated materials and established the best architecture for achieving enhanced removal efficiency toward con- taminants in water. To evaluate the best configuration, we studied the adsorption capacity of both systems on two organic molecules (i.e., fluoroquinolonic antibiotics ofloxacin and ciprofloxacin) and a heavy metal (lead Pb2þ) of great environmental relevance and with already proved high affinity for GO. The Pb monolayer maximum adsorption capacity qmax was 11.1 mg/g for embedded GO aerogels and 1.5 mg/g in coated GO-ones. Only minor differences were found for organic contaminants between coating and embedding approaches with an adsorption capacity of 5e8 mg/g and no adsorption was found for chitosan-gelatin control aerogels without GO. Finally, potential antimicrobial effects were found particularly for the GO-coated aerogels materials, thus corroborating the multifunctionality of the newly developed porous structures.

filter

​Recycling, Resources, Urban, Waste, Water

graphene

Författare

Alessandro Kovtun

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Elisabetta Campodoni

Istituto di scienza e tecnologia dei materiali ceramici (ISTEC-CNR)

Laura Favaretto

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Massimo Zambianchi

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Anastasio Salatino

Istituto di ricerca sulle acque (IRSA-CNR)

Stefano Amalfitano

Istituto di ricerca sulle acque (IRSA-CNR)

Maria Luisa Navacchia

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Barbara Casentini

Istituto di ricerca sulle acque (IRSA-CNR)

Vincenzo Palermo

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Monica Sandri

Istituto di scienza e tecnologia dei materiali ceramici (ISTEC-CNR)

Manuela Melucci

Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)

Chemosphere

0045-6535 (ISSN)

Vol. 259 November 2020 127501

Graphene Core Project 3 (Graphene Flagship)

Europeiska kommissionen (EU), 2020-04-01 -- 2023-03-31.

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Produktion

Materialvetenskap

Ämneskategorier

Vattenteknik

Geokemi

Miljövetenskap

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1016/j.chemosphere.2020.127501

Mer information

Senast uppdaterat

2020-11-10