- Title
- Removal of PFASs from biosolids using a semi-pilot scale pyrolysis reactor and the application of biosolids derived biochar for the removal of PFASs from contaminated water
- Creator
- Kundu, Sazal; Patel, Savankumar; Halder, Pobitra; Patel, Tejas; Hedayati Marzbali, Mojtaba; Pramanik, Biplob Kumar; Paz-Ferreiro, Jorge; De Figueiredo, Cícero Célio; Bergmann, David; Surapaneni, Aravind; Megharaj, Mallavarapu; Shah, Kalpit
- Relation
- Environmental Science: Water Research & Technology Vol. 7, Issue 3, p. 638-649
- Publisher Link
- http://dx.doi.org/10.1039/d0ew00763c
- Publisher
- Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2021
- Description
- This study focuses on the conversion of biosolids to biochar and its further use in adsorbing per- and polyfluoroalkyl substances (PFASs) from contaminated water. In particular, this study aims to (a) investigate the performance of a semi-pilot fluidised bed pyrolysis unit in converting biosolids into biochar, (b) examine the ability of the pyrolysis-combustion integrated process to destruct PFASs present in biosolids and (c) study the application of biosolids derived biochar for removing PFASs from contaminated water. The semi-pilot fluidised bed pyrolysis unit demonstrated stable temperature and oxygen profiles in the reactor. The yield of biochar was found to be 36-45% at studied temperatures (500–600 °C). The produced biosolids derived biochar samples, due to their lower H/C and O/C ratio, were found to be extremely stable with an expected long (millennia) residence time in soil. It was concluded that >90% removal of perfluorooctanesulfonate (PFOS) and perfluorooctanoic acid (PFOA) from biosolids derived biochar could be achieved in the pyrolysis-combustion integrated process. The biosolids derived biochar demonstrated >80% adsorption of long-chain PFASs and 19-27% adsorption of short-chain PFASs from PFAS contaminated water.
- Subject
- biosolids; biochar; contaminated water; PFAS; SDG 6; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1435123
- Identifier
- uon:39615
- Identifier
- ISSN:2053-1400
- Language
- eng
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