期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 752, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.141662
关键词
Water treatment; pharmaceuticals; cellulose-derived; waste pyrolysis; carbon adsorbents; chemical activation
资金
- FCT - Fundacao para a Ciencia e a Tecnologia, I.P. [POCI-01-0145-FEDER-028598]
- FEDER, within the PT2020 Partnership Agreement
- FEDER, within Compete 2020
- CESAM [UIDB/50017/2020+UIDP/50017/2020]
- FCT/MEC
- FCT [IF/00314/2015, CEECIND/00007/2017, SFRH/BD/138388/2018]
- Spanish government [RYC-2017-21937]
- European Social Fund (ESF)
- Fundação para a Ciência e a Tecnologia [SFRH/BD/138388/2018] Funding Source: FCT
This study successfully produced activated carbon using microwave-assisted technology and demonstrated its feasibility for efficient removal of antibiotics from water through optimizing production conditions.
This work aimed at the microwave-assisted production of activated carbon (AC) from primary paper mill sludge (PS) for the adsorption of antibiotics from water. Production conditions, namely pyrolysis temperature, pyrolysis time and activating agent (KOH):PS ratio, were optimized as a function of product yield, specific surface area (S-BET), total organic carbon (TOC) content and adsorptive removal percentage of two target antibiotics (amoxicillin (AMX) and sulfamethoxazole (SMX)). Under the optimized conditions (pyrolysis at 800 degrees C during 20 min and a KOH:PS ratio of 1:5), a microporous AC (MW800-20-1:5, with S-BET = 1196m(2) g(-1), TOC = 56.2% and removal of AMX and SMX = 85% and 72%, respectively) was produced and selected for further kinetic and equilibrium adsorption studies. The obtained results were properly described by the Elovich reaction-based kinetic model and the Langmuir equilibrium isotherm, with maximum adsorption capacities of 204 +/- 5 mg g(-1) and 217 +/- 8mg g(-1) for AMX and SMX, respectively. Considering the satisfactory comparison of these results with the performance of commercial and alternative AC produced by conventional pyrolysis, thiswork demonstrated the feasibility of the microwave-assisted production of environmentally and energetically sustainable waste-based AC to be applied in the efficient removal of antibiotics from water. (C) 2020 Elsevier B.V. All rights reserved.
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