Paper pulp-based adsorbents for the removal of pharmaceuticals from wastewater: A novel approach towards diversification
authors Oliveira, G; Calisto, V; Santos, SM; Otero, M; Esteves, VI
nationality International
journal SCIENCE OF THE TOTAL ENVIRONMENT
author keywords Emerging contaminants; Adsorption; Activated carbons; Water treatment; Raw pulp; Bleached pulp
keywords ACTIVATED CARBON; MILL SLUDGE; SEWAGE-SLUDGE; ADSORPTION; SULFAMETHOXAZOLE; CARBAMAZEPINE; SURFACE; SORPTION; BIODEGRADATION; TRIMETHOPRIM
abstract In this work, two pulps, bleached (BP) and raw pulp (RP), derived from the paper production process, were used as precursors of non-activated and activated carbons (ACs). In the case of non-ACs, the production involved either pyrolysis or pyrolysis followed by acid washing. For ACs production, the pulps were impregnated with K2CO3 or H3PO4, and then pyrolysed and acid washed. After production, the materials were physically and chemically characterized. Then, batch adsorption tests on the removal of two pharmaceuticals (the anti-epileptic carbamazepine (CBZ) and the antibiotic sulfamethoxazole (SMX)) from ultra-pure water and from Waste Water Treatment Plant (WWTP) effluents were performed. In ultra-pure water, non-ACs were not able to adsorb CBZ or SMX while ACs showed good adsorption capacities. In WWTP effluents, although ACs satisfactorily adsorbed CBZ and SMX, they showed lower adsorption capacities for the latter. Tests with WWTP effluents revealed that the best adsorption capacities were achieved by carbons produced from BP and activated with H3PO4: 92 +/- 19 mg g(-1) for CBZ and 13.0 +/- 0.6 mg g(-1) for SMX. These results indicate the potential of paper pulps as precursors for ACs that can be applied in wastewater treatment. (C) 2018 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0048-9697
year published 2018
volume 631-632
beginning page 1018
ending page 1028
digital object identifier (doi) 10.1016/j.scitotenv.2018.03.072
web of science category Environmental Sciences
subject category Environmental Sciences & Ecology
unique article identifier WOS:000432471900103
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