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Volume 2
Journal of Environmental Research
Page 79
JOINT EVENT
July 26-27, 2018 Rome, Italy
&
6
th
Edition of International Conference on
Water Pollution & Sewage Management
4
th
International Conference on
Pollution Control & Sustainable Environment
Rapid removal of phosphates, nitrates, lead, and cadmium fromwastewater using fast pyrolysis biochar
Akila G Karunanayake
1
and
Renel Anderson
2
1
Biochar Supreme Inc., USA
2
Innovochar, USA
M
agnetic biochar was prepared by magnetite (Fe
3
O
4
) precipitation onto the biochar’s surface from an aqueous Fe
3+
/Fe
2+
solution upon NaOH treatment. The resulting magnetic and raw biochar was used to remove phosphates, nitrates, lead,
and cadmium from water. The surface chemistry and composition of the biochars were examined by TEM, SEM, SEM-EDX,
XPS, XRD, PZC, elemental analysis, and surface area measurements. Batch sorption studies were carried out from pH 2 to 10
using different adsorbate concentrations at 25, 35 and 45°C. Magnetic biochar was suspensions in the contaminated solutions
were vortexed for two min and then magnetically removed. Remediated solutions were then analyzed using UV-Visible
spectroscopy and AAS. Sorption studies were carried out at 25, 35 and 45°C was evaluated using the Langmuir, Freundlich,
Sips, Redlich–Peterson, and Toth adsorption isotherm models. The fast adsorption kinetics and high adsorption capacities of
biochar could be advantageously employed in filtration devices, columns, or as shown here, in batch operations with stirring
to speed adsorption, followed by magnetic separation of the adsorbent for regeneration.
akila@innovochar.comJ Environ Res 2018, Volume: 2