What if when we put activated charcoal in Concentrated HCl?
Answers
Explanation:
need to wash some KOH-activated carbons with HCl. From literature different procedures are reported. Usually the concentration is between 1 and 5 M but ...
Answer:
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Activated Coconut Shell Charcoal Carbon Using Chemical-
Physical Activation
Esmar Budi a), Umiatin, Hadi Nasbey, Ridho Akbar Bintoro, Futri Wulandari and
Erlina
Physics Department, Faculty of Science and Mathematics, Universitas Negeri Jakarta
Jl. Pemuda No. 10 Rawamangun Jakarta 13220, Indonesia
a)Corresponding author: [email protected]
Abstract. The use of activated carbon from natural material such as coconut shell charcoal as metal absorbance of the
wastewater is a new trend. The activation of coconut shell charcoal carbon by using chemical-physical activation has
been investigated. Coconut shell was pyrolized in kiln at temperature about 75 - 150 0
C for about 6 hours in producing
charcoal. The charcoal as the sample was shieved into milimeter sized granule particle and chemically activated by
immersing in various concentration of HCl, H3PO4, KOH and NaOH solutions. The samples then was physically
activated using horizontal furnace at 4000
C for 1 hours in argon gas environment with flow rate of 200 kg/m3
. The
surface morphology and carbon content of activated carbon were characterized by using SEM/EDS. The result shows that
the pores of activated carbon are openned wider as the chemical activator concentration is increased due to an excessive
chemical attack. However, the pores tend to be closed as further increasing in chemical activator concentration due to
carbon collapsing.
INTRODUCTION
Heavy metals such as iron, copper etc may be commonly present in wastewater and ground water system [1-4].
The heavy metal is toxic since it can not be degraded biologically into environment freindly product. Thus the heavy
metals removal from wastewater and ground water is an important treatment to avoid them absorbed by the living
organism, enter the food chain and at the end accumulate into human body.
Removing heavy metals can utilize a natural absorbent such as coconut shell charcoal since it has high carbon
density and porosity [5]. The charcoal can be activated physically by using by varying argon gas pressure, activation
time and temperature. It showed that the pores of charcoal were distributed uniformly and the pores size reduced as
the physical activation parameters were increased [6, 7]. The chemical activation was performed by emmersing the
charcoal into chemical solution so that the solution penetrate deep into the carbon charcoal structure to develop the
pores [8, 9]. The results showed that the nanopores were developed on the charcoal. The investigation result showed
that the narrowed pores size distribution were developed accurately by using physical activation while the high
density carbon that impact to the high volumetric adsorption was developed by using chemical activation [10].
In this study, the coconut shell charcoal was activated by using chemical-physical activation comination to
achieve optimum activated carbon performance.
EXPERIMENT
The coconut shell charcoal was produced by pyrolysis process in kiln at temperature about 75-150 0
C for about 6
hours. Before activation process, the charcoal samples were washed by using aquades and dried by using furnace at
temperature of 120 0
C for about 12 hours. Next, the charcoal was sieved into milimeter size granule then cleaned by
2nd Padjadjaran International Physics Symposium 2015 (PIPS-2015)
AIP Conf. Proc. 1712, 050003-1–050003-6; doi: 10.1063/1.4941886
© 2016 AIP Publishing LLC 978-0-7354-1359-7/$30.00
050003-1