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M a y 0 9 - 1 0 , 2 0 1 9
S t o c k h o l m , S w e d e n
Page 46
Journal of Organic & Inorganic Chemistry
ISSN: 2472-1123
Advanced Chemistry 2019
2
nd
European Congress on
Advanced Chemistry
T
he fabrication of magnetic iron enriched biochar nano-composite and its further use as an adsorbent to recover phosphate from
liquid fractions of anaerobic digestate were comparatively evaluated in this study. The raw biochars (Coconut Shell and Wheat)
were magnetically modified through their dissolution in FeCl
3
.nH
2
OFeSO
4
and Fe
2
(SO
4
)
3
.nH2O (n=6 to 9). The comparative performance
evaluation between pristine (Coconut shell biochar, CCB; Wheat biochar, WHB) and magnetically modified biochars (Coconut shell
magnetic biochar, CCMB; Wheat magnetic biochar, WHMB) was investigated through a series of batch experiment. Magnetic Fe biochar
surface modification showed a decrease of negative charge as well as surface area properties of CCMB and WHMB. Obtained results
indicate that, magnetically modified biochars showed remarkable adsorption performance CCMB and WHMB (33.27 and 29.71 mg.g
-1
)
due to positive charge built up onto the surface of modified chars rather than CCB and WHB (17.57 and 15.21 mg.g
-1
). The nature of
PO
4
3
- sorption for modified and unmodified chars confirmed to the Pseudo 2
nd
order (R
2
= 0.999, 0.999, 0.999, 0.998–0.998, 0.999, 0.998,
0.999). The isotherm data was better fitted to the Langmuir and Freundlich model (R
2
= 0.967, 0.960, 0.987, 0.946)-(0.983, 0.983, 0.997,
0.997). The characterization results (XRD, SEM, and FTIR) showed that multiple sorption mechanism was involved during adsorption
process. The dominant PO
4
3
- sorption pathway to CCMB and WHMB was electrostatic attraction, surface precipitation rather than
unmodified chars where electrostatic attraction was dominant. Thermodynamically, spontaneous and endothermic PO
4
3
- adsorption
mechanism in solution and liquid digestate was mainly associated with dipole dipole and hydrogen bonding force. Furthermore, the
regenerated MBCs retained the substantial PO
4
3
- adsorption capacity upto several time of regeneration cycles. Thus, obtained results
herein suggest that these materials could be employed as a potential filter to recover nutrients from contaminated matrix.
zisheuaf@gmail.comFabrication of magnetic iron enriched biochar
nano-composite: effective phosphate recovery
from anaerobic digested swine slurry and
influencing factors
Zeeshan Ajmal
1
, Muhammad Usman
2,3
, Simon Kizito
1
, Dominic
Abaogye
1
, Renjie Dong
1
and Shubiao Wu
4
1
Key Laboratory of Clean Utilization Technology for Renewable Energy in Ministry of Agriculture,
College of Engineering, China Agricultural University, PR China
2
Center for Applied Geosciences-University of Tübingen, Germany
3
Institute of Soil and Environmental Sciences- University of Agriculture, Pakistan
4
Aarhus University, Denmark
J Org Inorg Chem 2019, Volume:5
DOI: 10.21767/2472-1123-C2-024