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Macro- and micro-algae-based carbon composite for pharmaceutical wastewater treatment: Batch adsorption and mechanism study.
- Source :
-
Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B . Aug2023, Vol. 176, p641-652. 12p. - Publication Year :
- 2023
-
Abstract
- Biochar synthesized from algal biomasses acts as an efficient adsorbent to remove tetracycline (TC) from aqueous solutions. In this study, a mixture of Enteromorpha (EN) and Chlorella vulgaris (CV) was pyrolyzed at 500 °C, then activated with NaOH at 800 °C to prepare composite biochar (EC A -B). The effects of TC concentration (50–500 mg·L−1), pH (3–11), temperature (30 °C–50 °C), and contact time (0–960 min) on TC absorption were investigated. Results revealed that in aqueous solutions, the biochar (EC 4:1 -0.5)prepared with CV and EN at the mass ratio of 4:1 and the impregnation ratio of 0.5 had the optimal TC adsorption capacity (Q m = 376.878 mg·g−1). The removal rate of EC 4:1 -0.5 remained above 80 % after five cycles. The surface area of EC 4:1 -0.5 (583.329 m2·g−1) increased by three and four times that of EN and CV, respectively. Intraparticle diffusion was considered as the major limitation for the adsorption of TC onto EC 4:1 -0.5. This investigation provides a method for the synthesis and optimization of algal biomass-based activated carbon for the absorption of organic pollutants in wastewater. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09575820
- Volume :
- 176
- Database :
- Academic Search Index
- Journal :
- Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B
- Publication Type :
- Academic Journal
- Accession number :
- 165040918
- Full Text :
- https://doi.org/10.1016/j.psep.2023.06.020