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The effect of the solvent on the The effect of the solvent on the The effect of the solvent on the
The effect of the solvent on the
plasma degradation of phorbol plasma degradation of phorbol plasma degradation of phorbol
plasma degradation of phorbol
esters extracted from Jatropha oilesters extracted from Jatropha oilesters extracted from Jatropha oil
esters extracted from Jatropha oil
IC-PLANTS 2013(2013/2/2、Gero)
Osaka Prefecture UniversityH.Matsuura, S.Kongmany
M.Furuta, K.Imamura,Y.Maeda and S.Okuda
Background
• What is biodiesel?– It is an alternative for light oil,
which is extracted from seed of some kinds of plants.
• What is most useful to produce it?– Jatropha curcas (南洋脂桐) attracts
attention all over the world.• Why is detoxification needed?
– Jatropha oil contain phorbol esters (PE) that act a strong cancer promoter.
Why Why Why
Why
is degradation of J. curcas PEs needed?is degradation of J. curcas PEs needed?is degradation of J. curcas PEs needed?
is degradation of J. curcas PEs needed?
Present in Jatropha, Phorbol ester (PEs) is like double-edges sward. Present in Jatropha, Phorbol ester (PEs) is like double-edges sward. Present in Jatropha, Phorbol ester (PEs) is like double-edges sward.
Present in Jatropha, Phorbol ester (PEs) is like double-edges sward.
[Harinder P.S. Makkar et al. (2012)]
1 • Agricultural use: Natural molluscicide, fungicide, and bactericide against snails, fungal phytopahtogens and bacteria.
• Pharmacological tool: promoting cancer cells for cancer research.
2 • Toxic to human as tumor promoter and negative biological activities.Toxic to human as tumor promoter and negative biological activities.Toxic to human as tumor promoter and negative biological activities.
Toxic to human as tumor promoter and negative biological activities.
Biological Activity Biological Activity Biological Activity
Biological Activity
[Rakshit K. et al. (2007, 2011)]
• Action on Protein Kinase C, Tumor production, Platelet Aggregation, Cell Differentiation, and Metabolic Activities
ToxicityToxicityToxicity
Toxicity
[C-Y. Li et al. (2010)]
Pathological symptoms in lung and kidney, etc.Pathological symptoms in lung and kidney, etc.Pathological symptoms in lung and kidney, etc.
Pathological symptoms in lung and kidney, etc.
AnimalAnimalAnimal
Animal
100% Mortality (in days)100% Mortality (in days)100% Mortality (in days)
100% Mortality (in days)
mg PEs , consumed/kg body weightmg PEs , consumed/kg body weightmg PEs , consumed/kg body weight
mg PEs , consumed/kg body weight
Nubian goatNubian goatNubian goat
Nubian goat
7-97-97-9
7-9
10.5-13.510.5-13.510.5-13.5
10.5-13.5
Desert sheepDesert sheepDesert sheep
Desert sheep
3-53-53-5
3-5
4.5-7.54.5-7.54.5-7.5
4.5-7.5
Nubian goat kidNubian goat kidNubian goat kid
Nubian goat kid
7-117-117-11
7-11
10.5-16.510.5-16.510.5-16.5
10.5-16.5
LD50 = 27.34 mg/kg body weight in mice [Li. et. 2010]LD50 = 27.34 mg/kg body weight in mice [Li. et. 2010]LD50 = 27.34 mg/kg body weight in mice [Li. et. 2010]
LD50 = 27.34 mg/kg body weight in mice [Li. et. 2010]
What is superior of using plasma?
• Compact and low cost device to be used in developing countries
• no limitation such as radiation protection law
• many control knob to optimize process– working/environment gas, power, freq., so on
– dose/dose rate(radiation), freq./power(Sonic)
• easy suppression of individual promoter's effect(ion, UV, radical, heat)
Schematic drawing of plasma source
Heat influx from plasma is smaller than gas cooling.
Plasma Degradation of PEPlasma Degradation of PEPlasma Degradation of PE
Plasma Degradation of PE
sss
s
amplesamplesamples
amples
Plasma has a direct interaction with the solvent(water), which seems to become another electrode. Its temperature increase is, however, kept to be quite small.
Distance between sample and plasma source
Narrow gap(rich radical?) wide gap(no interaction)
Analytic Analytic Analytic
Analytic
InstrumentationInstrumentationInstrumentation
Instrumentation
ColumnColumnColumn
Column
Shim-pack XR-ODSII (2.0 mm i.d x 75 mm) Temperature : 35 oC.
Mobile PhaseMobile PhaseMobile Phase
Mobile Phase
Binary Gradient Mode: Pump A: water (H2O) Pump B: acetonitrile( ACN)Total flow: 0.400 mL
PDAPDAPDA
PDA
Scan mode: = 200 – 400 nm. Slit width : 1.2 nmLams : D2/WCell temperature: 40oC
Injector and analysis timeInjector and analysis timeInjector and analysis time
Injector and analysis time
Auto-sampler with 2 L injection volume.The phorbol esters detection was at =280nmLC stop time : 25 min.
Radiation Research CenterRadiation Research CenterRadiation Research Center
Radiation Research Center
Fig. 2 Fig. 2 Fig. 2
Fig. 2
LCMS 3080 equipped with both photodiode array detector (PDA) and Mass spectrometry detector (Shimadzu, Japan).
Calibration curveCalibration curveCalibration curve
Calibration curve
Fig. <Fig. <Fig. <
Fig. <
………
…
> > >
>
Calibration curve of standard phorbol ester using TPA (Phorbol-12-Myristate-13-Acetate)
and linear regression equation with relative coefficient of 0.9995
Fig. 3 Fig. 3 Fig. 3
Fig. 3
Preparation of TPA standard solution with concentration of 10, 30, 50, 70 and 100 ppm (mg/L).
Radiation Research CenterRadiation Research CenterRadiation Research Center
Radiation Research Center
Treatment of aqueous solution
HPLC/UV chromatograms of aqueous solution of: (a) HPLC/UV chromatograms of aqueous solution of: (a) HPLC/UV chromatograms of aqueous solution of: (a)
HPLC/UV chromatograms of aqueous solution of: (a)
TPA and (b) mixed jatropha phorbol esters (4 peaks each TPA and (b) mixed jatropha phorbol esters (4 peaks each TPA and (b) mixed jatropha phorbol esters (4 peaks each
TPA and (b) mixed jatropha phorbol esters (4 peaks each
peak corresponding to each type of jatropha factor) peak corresponding to each type of jatropha factor) peak corresponding to each type of jatropha factor)
peak corresponding to each type of jatropha factor)
before and after plasma irradiation for 15 min.before and after plasma irradiation for 15 min.before and after plasma irradiation for 15 min.
before and after plasma irradiation for 15 min.
Molecular structure of PE
Molecular structures of (a) 4ß-12-O-tetradecanoyl phorbol-13-acetate (TPA) and (b) jatropha phorbol esters (jatropha factor C1 to C6) found in jatropha curcas L.
Treatment of methanolic solution
HPLC/UV chromatograms of methanolic solution of: (a) TPA and (b) mixed jatropha phorbol esters (4 peaks each peak corresponding to each type of jatropha factor) before and after plasma irradiation for 15 min.
How How How
How
is the flow of J. curcas PEs during biodiesel production is the flow of J. curcas PEs during biodiesel production is the flow of J. curcas PEs during biodiesel production
is the flow of J. curcas PEs during biodiesel production
processes?processes?processes?
processes?
Sources: Sources: Sources:
Sources:
H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of
H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of
Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173
Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173
–––
–
181181181
181
J. J. J.
J.
Curcas Curcas Curcas
Curcas
seedseedseed
seed
Oil Oil Oil
Oil
extractioextractioextractio
extractio
nnn
n
Crude Crude Crude
Crude
OilOilOil
Oil
Oil Oil Oil
Oil
RefiningRefiningRefining
Refining
FertilizersFertilizersFertilizers
Fertilizers
Live-stock Live-stock Live-stock
Live-stock
feedingfeedingfeeding
feeding
DegummingDegummingDegumming
Degumming
Degummed oilDegummed oilDegummed oil
Degummed oil
BleachingBleachingBleaching
Bleaching
DeodorizationDeodorizationDeodorization
Deodorization
Refined OilRefined OilRefined Oil
Refined Oil
TransesterificationTransesterificationTransesterification
Transesterification
Crude Crude Crude
Crude
BiodieselBiodieselBiodiesel
Biodiesel
Glycerol & ImpuritiesGlycerol & ImpuritiesGlycerol & Impurities
Glycerol & Impurities
Washing Washing Washing
Washing
with waterwith waterwith water
with water
Waste Waste Waste
Waste
waterwaterwater
water
Clean Clean Clean
Clean
BiodieselBiodieselBiodiesel
Biodiesel
DeacidificationDeacidificationDeacidification
Deacidification
Acid gums and wastewaterAcid gums and wastewaterAcid gums and wastewater
Acid gums and wastewater
Seed Seed Seed
Seed
cakecakecake
cake
• 70-75% PEs 70-75% PEs 70-75% PEs
70-75% PEs
move to the oil.move to the oil.move to the oil.
move to the oil.
• 25-30% PEs 25-30% PEs 25-30% PEs
25-30% PEs
retain in the seed retain in the seed retain in the seed
retain in the seed
cake.cake.cake.
cake.
• About 22.58% and 3.98% of PEs were reduced after degumming step from crude oil obtained by solvent extraction and pressing, respectively.
PEs are completely degraded at deodorization at temperature 260oC under reduced pressure.
Direct transesterification of oil, PEs would be converted into original phorbol contaminating into the glycerol phase.
Phorbol ester content (expressed in mg/g Phorbol ester content (expressed in mg/g Phorbol ester content (expressed in mg/g
Phorbol ester content (expressed in mg/g
±±±
±
SD, n = 3) of the different fractions obtained SD, n = 3) of the different fractions obtained SD, n = 3) of the different fractions obtained
SD, n = 3) of the different fractions obtained
during pre-treatment and transesterification of three different Jatropha oil samples.during pre-treatment and transesterification of three different Jatropha oil samples.during pre-treatment and transesterification of three different Jatropha oil samples.
during pre-treatment and transesterification of three different Jatropha oil samples.
ParametersParametersParameters
Parameters
Solvent extractedSolvent extractedSolvent extracted
Solvent extracted
PressedPressedPressed
Pressed
Non-toxicNon-toxicNon-toxic
Non-toxic
Crude oil 3.10 ± 0.25 3.77 ± 0.03 ND
Degummed oil 2.48 ± 0.24 3.62 ± 0.19 ND
Acid gums 2.02 ± 0.07 3.35 ± 0.00 ND
Wash water 2.72 ± 0.01 2.08 ± 0.48 ND
Silica-treated oil 2.51 ± 0.33 3.76 ± 0.50 ND
Spent silica NA NA NA
Stripped oil ND ND ND
Fatty acid distillate ND ND ND
Biodiesel ND ND ND
Crude glycerine ND ND ND
Biodiesel wash water ND ND ND
ND: Not detectable; NA: Not analyzed
Sources: Sources: Sources:
Sources:
H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of
H. Makkar et al., Removal and Degradation of Phorbol Esters during Pre-treatment and Transesterification of
Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173
Jatropha curcas Oil, J Am Oil Chem Soc (2009) 86:173
–––
–
181181181
181
HowHowHow
How
is the flow of J. curcas PEs during biodiesel production processes?is the flow of J. curcas PEs during biodiesel production processes?is the flow of J. curcas PEs during biodiesel production processes?
is the flow of J. curcas PEs during biodiesel production processes?
Conclusion
• UV Chromatogram is successfully applied to quantitative analysis of Phorbol Esters in Jatropha oils, and degradation of Phorbol ester with atmospheric plasma and is confirmed.
• Effect of plasma irradiation depends not only on the molecular structure of PE, but also on the kind of solvent.
• This may be due to production process of active radical such as OH.
Future works• Test using PE with much simpler structure to
study degradation mechanism.
• Plasma diagnostic and radical measurement, aiming intelligent plasma processing • Solvent temperature( -->SPP30 ) • OH concentration( -->ISPlasma2013 )• Input energy (discharge current)• plasma density and temperature
• Direct confirm of detoxification, not merely disappear of Phorbol Ester
Appendix
BackgroundAtmospheric pressure plasma is now attractive for decontamination of environmental waste and medical technology, because of
low cast without vacuum pumping systemapplicability for biomaterial that does not less tolerate vacuumlarge process speed
Recently application of plasma to solution samples has gathered much attention in chemical of food industry field. (ex. degradation of Phorbol esters)
Temperature monitor of treated samples is importantto keep treatment process.to estimate heat influx and deduce physical processes with it.
Preliminary heat flux estimation on solid target has already reported.But measurement on liquid target is found to have a problem.
Degradation of Phorbol Ester
OC
CH2OH
H
OH
H3C
O
H
OH
H3C
CH3CH3
H
CCH3
H3C(H2C)11H2CC
O
O
O
US / US / US /
US /
γ-ray-ray-ray
-ray
2 (•OH) 2 (•H)
TetraDecanoyl Phorbol-13-Acetae (TPA)TetraDecanoyl Phorbol-13-Acetae (TPA)TetraDecanoyl Phorbol-13-Acetae (TPA)
TetraDecanoyl Phorbol-13-Acetae (TPA)
Phorbol 12-myristate 13-acetate (PMA)Phorbol 12-myristate 13-acetate (PMA)Phorbol 12-myristate 13-acetate (PMA)
Phorbol 12-myristate 13-acetate (PMA)
HOHO
CH2OH
H
OH
H3C
O
H
OH
H3C
CH3CH3
phorbol
H
PhorbolPhorbolPhorbol
Phorbol
S.Kongmany, 11th APCPST (Kyoto, 2012) 3-P92.
Estimate plasma heat flux
0
4
8
12
16
20
1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000
TC(center)
time[s]
TC[d
eg.]
datafitting
Estimation with exponential fitting Q(~dT/t) = 0.5 [W]
12
4
0
0.5 0.17
Target moved
Heat flux depends upon measurement position.
dTdecay time t is obtained by fitting.
Heat flux measurement with Cu target
Heat flux determination
Type-T TC Temperature gradient methodType-K TC Fitting/cut method
Electrically isolated
Easy to modify for Q-V characteristic
Material: Cu, Mo
provided by Osakabe(NIFS)
Yambe's work on calorimetry
He gas He plasma
Water temperature is monitored for He gas/plasma irradiation.(22P039-P, plasma conference 2011, Kanazawa)
The difference of two case corresponds to plasma heat flux.
They said 3.81E-5[J] energy was carried by 13[kHz] micro pulse, which consists plasma jet. Average heat flux is 0.5[W].
Is the thermal of water vessel isolation sufficient?
Is temperature in water homogeneous?
But thermocouple shows irregular behaviour, and can not be used.
Abnormal jump of TC signal Water(after 1000[s])
Reference(RT)
Bekar(bottom) recorded with mv100
When TC is in the water, TC signal jumps abnormally. Why?
Principle of thermocouple
TC wiring consists an large loop, which could act as an antenna, and the large induction current may flow.
Electrical cold junction
CT1200D (CUSTOM)
MV100 (YOKOGAWA)
ENET9211 (NI)
Tolerance of compensation circuit against large current noise is different depending on the data logger used.
Experiment setup
TC signals recorded with ENET9211
Room Temp.Baker wallWater by TC with sheathWater by bear TCWater by alcohol thermometer
Comparison of thermometer data
TC signals recorded with ENET9211
Room Temp.Baker wallWater by TC with sheathWater by bear TCWater by alcohol thermometer
Consideration on TC jump
• It occurs only when one TC is in water.• It has threshold discharge power.
– Even before breakdown, it may occur. – Even discharge continue, signal recovers from
it with reducing power.• It occurs for all TC simultaneously,
regardless measuring points.
This TC signal jump seems to the results of malfunction of cold-junction compensation circuit, not of interaction between TC material and radicals in water.
How to avoid
• Set TC outside baker (with isolation blanket)
• Use other kind of thermometer (such as Pt resistor thermometer)
• Use TC with noise shield or recorder with pulse isolation function
These methods would be tested in near future.
Conclusion
• Thermocouple temperature measurement often suffers signal jump and monitoring becomes impossible.
• This is not due to chemical process in water. Most possible cause is induction current in TC circuit.
• By reducing induction effect or by isolation the circuit, this problem might be overcome.
Atmospheric Pressure Plasma Jet
Power supplyLHV-13AC(Logy Electric Co.LTD.) Input AC100V/2A Output 10KV/120mA RMS 9~12KHz Size 140×92×175 Weight 1.4kg