| Title | Sustainable utilization of Sedum plumbizincicola as superior hydrochar for efficient nutrients recovery |
|---|---|
| ID_Doc | 29744 |
| Authors | Zhang, RC; Zhang, YZ; Goei, R; Oh, WD; Zhang, Z; He, C |
| Title | Sustainable utilization of Sedum plumbizincicola as superior hydrochar for efficient nutrients recovery |
| Year | 2023 |
| Published | |
| Abstract | To realize sound disposal of hyperaccumulator harvested from phytoremediation, hydrothermal carbonization (HTC) has been employed to obtain superior hydrochar adsorbents for removal of phosphate and ammonium from water body. A series of hydrochars have been prepared under tuned HTC conditions to tailor hydrochar with desired properties. Generally, increased temperature and prolonged reaction time facilitated acidic oxygen functional groups on hydrochars, thereby improving adsorption capacity of hydrochar. In single solute system, a superior hydrochar, derived from HTC under 260 degrees C for 2 h, achieved a maximum phosphate and ammonium adsorption capacity of 52.46 mg/g and 27.56 mg/g at 45 degrees C, respectively. In binary system, synergistic adsorption was observed only in lower solute concentration, whereas competitive adsorption occurred under higher solute concentration. Characterization and adsorption kinetics suggested chemisorption may dominate the adsorption process, thus the adsorption capacity could be improved by tuning pHpzc of hydrochar. This study firstly demonstrates the sustainable utilization of hyperaccumulators into nutrients-enriched hydrochar as fertilizer for in-situ phytoremediation of contaminated sites with minimized environmental risks towards circular economy. |
| https://doi.org/10.1016/j.jenvman.2023.118441 |
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