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  • 7/21/2019 Journal Green Technology Summit 2014

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    Green Technology Summit Universiti Tenaga Nasional

    GTS 2014

    FROM TRASH TO TREASURE :

    ORGANIC NEUTRALIZER, OIL AND ODOR

    REMOVAL

    INVENTORS :

    SEPINTAR YOUNG INVENTORS

    AHMAD KHAIDIR BIN AZHAR

    ANNOR BASYIR BAIHAQI BIN ANUZI

    WAN MOHAMAD FAWWAZ BIN WAN MOHD FADZLULLAH

    MUHAMMAD AFIQ ZUHAIR BIN AZINI

    SHAJARATUDDUUR BIN HUSSIN

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    FROM TRASH TO TREASURE : ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL 1

    AHMAD KHAIDIR BIN AZHAR

    ANNOR BASYIR BAIHAQI BIN ANUZI

    WAN MOHAMAD FAWWAZ BIN WAN MOHD FADZLULLAH

    MUHAMMAD AFIQ ZUHAIR BIN AZINI

    SHAJARATUDDUUR BINTI HUSSIN

    TRASH TO TREASURE:

    ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL

    ABSTRACT

    Kitchen wastewater discharged into the drains cause odor pollution and water

    pollution on the environment. This is because kitchen wastewater discharged has a very foul

    smell and oily. Furthermore, the kitchen wastewater has a very low pH value rate of pH 4

    which is acidic. Thus, the problem leads to a study that investigates the potential of the

    durian peel as a kitchen wastewater neutralizer, deodorizer and oil ejector. Durian peels

    were cut in sizes of 5cm3and were turned into charcoals by pyrolysis process at 500C using

    a Bunsen burner for 45 minutes. After that, the charcoals were immersed in sodium chloride

    (NaCl) at a concentration of 25 % for 12 hours. Next, the durian peels were dried in an oven

    at 120C for 3 hours. The charcoals were weighed to 4g and were immersed in the kitchen

    wastewater that has been filtered to remove suspended solids, in dosages of 200 ml and left

    for 5 hours with it. The result shows that the kitchen wastewater did not emit foul smell

    anymore, not oily, and the rate of the pH became neutral pH of 7. This is because the durian

    peels adsorb the oil and dirt that are acidic and smelly. Thus, it is proven that the durian

    peels have a great potential to treat kitchen wastewater by neutralize the water, adsorb foul

    odors and remove the oil.

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    FROM TRASH TO TREASURE : ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL 2

    AHMAD KHAIDIR BIN AZHAR

    ANNOR BASYIR BAIHAQI BIN ANUZI

    WAN MOHAMAD FAWWAZ BIN WAN MOHD FADZLULLAH

    MUHAMMAD AFIQ ZUHAIR BIN AZINI

    SHAJARATUDDUUR BINTI HUSSIN

    SAMPAH KEPADA HARTA:

    PENEUTRAL ORGANIK DAN PENYAHBAU SERTA MINYAK

    ABSTRAK

    Air sisa dapur yang dilepaskan ke dalam longkang mendatangkan masalah

    pencemaran bau serta pencemaran air terhadap alam sekitar. Hal ini kerana air sisa dapur

    yang dilepaskan mempunyai bau yang amat busuk dan berminyak. Tambahan pula, air sisa

    dapur tersebut mempunyai kadar nilai pH yang amat rendah iaitu pH 4 yang bersifat asid.

    Justeru, permasalahan tersebut membawa kepada sebuah kajian yang dijalankan bagi

    mengkaji potensi kulit durian sebagai peneutral air sisa dapur, penyahbau dan penyingkir

    minyak. Kulit durian dipotong dalam kadar saiz 5cm3

    dan dijadikan arang melalui proses

    pirolisis pada suhu 500C menggunakan penunu Bunsen selama 45 minit. Selepas itu, arang

    tesebut direndamkan di dalam Natrium Klorida (NaCl) pada kepekatan 25 % selama 12 jam.

    Setelah itu, arang kulit durian tersebut dikeringkan di dalam ketuhar pada suhu 120C

    selama 3 jam. Arang tersebut ditimbang sebanyak 4g dan direndamkan di dalam air sisa

    dapur yang telah ditapis bagi mengeluarkan pepejal terampai, pada sukatan 200 ml dan

    dibiarkan selama 12 jam bersamanya. Hasilnya air sisa dapur tersebut tidak lagi

    mengeluarkan bau busuk, tidak berminyak dan kadar nilai pH menjadi neutral iaitu pH 7. Hal

    ini kerana arang kulit durian tersebut telah menjerap minyak dan kotoran yang bersifat asid

    serta mengeluarkan bau busuk. Oleh itu, terbuktilah bahawa kulit durian amat berpotensi

    untuk merawat air sisa dapur dengan meneutralkan air tersebut, menjerap bau dan

    menyingkir minyak.

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    1.0 INTRODUCTION

    Durian or Durio is a type of fruit that grows well in Malaysia. Regarded by many

    people in southeast Asia as the "king of fruits", the durian is distinctive for its large size,

    strong odour, and formidable thorn-covered husk. It is a cheap energy source which is

    commonly prepared as local dishes. The centre of ecological diversity for durians is the island

    of Borneo, where the fruit of the edible species of Durio. The focus of this experiment is on

    the Durio Zibethinusspecies. In Peninsular Malaysia, the season for durians is typically from

    June to August. According to Wikipedia, Malaysia is expected to produce 265 000 tonnes of

    durian per year making it one of the biggest producer of durians. However, these figures did

    not only indicate the vast availability of durians but also the amount of waste durian peel

    generated. The peels that have been dumped and left unorganized may cause unpleasent

    smell and disturbing view to the surrounding. Durian peel contained of cellulose which has

    enable it to be applied for this purpose. Neutralization reactions where durian peel reacted

    with NaCl solution.

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    2.0 MATERIALS AND METHODS

    2.1 Preparation of material

    Waste durian peel that are used in this experiment were taken from night

    market in Rawang, Selangor. The durian peel were washed with raw water to remove

    dirt and been cut into sized of 5 cm3

    . The durian peels were dried for a day. Then, the

    durian peels were transformed into charcoal via the process of pyrolysis at the

    temperature of 500C using a Bunsen burner for 45 minutes. Then, the charcoals

    were soaked in 25% NaCl solution for 24 hours and been dried in an oven for 3 hours

    at 120C.

    2.2 Experimental and Analysis method

    There were four experiments carried out to invstigate the effectiveness of

    durian peel in kitchen wastewater; optimum pH, potential as odor remover and oil

    ejector.

    2.2.1 Stirring By Magnetic Stirrer

    Purpose: To find optimum pH of wastewater that can be achieved after treatmentusing Modified Charcoal at the different duration.

    To determine the optimum pH that can be achieved by Modified Charcoal with higher

    rate of neutralization. Basis 4g formulations of modified charcoal are added into a

    beaker containinng 200 ml of kitchen wastewater with the pH of 4.

    Optimum formulation of modified charcoal that can achieve optimum pH were carry

    out by conducting a magnetic stirrer with a beaker of kitchen wastewater at

    different duration. The magnetic stirrer ran simultaneously with constant speed

    which is 90 rpm. The pH was recorded at the interval of every 60 minutes. During

    this process, observation is recorded. This process is stopped after obtaining pH 7.

    2.2.2 Analysing using measuring cylinder through absorption

    Purpose : To find the optimum amount of oil absorption by Modified Charcoal

    This method is used to find the optimum oil absorption by Modified Charcoal. A

    controlled experiment is carried out involving 3 measuring cylinders with the same

    volume of oil of 20 ml per measuring cylinder. Different amount of modified charcoal

    are added to the measuring cylinders of 1g, 2g and 3g respectively. The measuring

    cylinders are left for 6 hours.The rate of adsorption of oil is recorded after 12 hours.

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    3.0 EXPERIMENTAL DESIGN RESULTS: FOR MODIFIED CHARCOAL

    Table 3.1 : Results tabulation using modified charcoal at different speed for pH and odor

    (a) Basis : 4.0 g (b) Speed : 90 RPM (c) Duration : 12 hours

    NO DESCRIPTION 4 hours 8 hours 12 hours

    1 Ph ( Optimum pH of 7

    )

    Before

    treatment

    4.2 4.2 4.2

    After

    treatment

    5.3 6.7 7.0

    2 Odor Before

    Treatment

    Foul Foul Foul

    After

    Treatment

    Smelly Less smelly Odorless

    Table 3.2 : Results tabulation using modified charcoal at different amount for oil ejector

    (a)

    Basis : 1g, 2g, 3g (b) Amount of oil : 20 ml (c) Duration : 12 hours

    NO DESCRIPTION 1g 2g 3g

    1 Oil BeforeTreatment

    20 ml 20 ml 20 ml

    After

    Treatment

    18 ml 16 ml 14 ml

    Percentage 10 % 20 % 30 %

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    4.0 DISCUSSION

    4.1 Optimum pH of kitchen wastewater after treatment.

    These results shows that by using 4.0 g of modified charcoal in 200 ml of kitchen wastewater, the pH

    of the treated water increases from acidic, pH 4.2 to neutral, pH 7.0. This treated wastewater

    maintained their final pH, and was recorded after filtration from the precipitate.

    Table 4.1.1 : Rate of neutralization

    Hours (hr) 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0

    pH Value 4.7 4.9 5.1 5.3 5.8 5.8 6.3 6.7 6.9 7.0 7.0 7.0

    Diagram 4.1.1 : Graph of pH measurement against time

    4.2

    4.74.9

    5.15.3

    5.8 5.8

    6.3

    6.76.9 7 7 7

    0

    1

    2

    3

    4

    5

    6

    7

    8

    0 1 2 3 4 5 6 7 8 9 10 11 12

    pHV

    alue

    Time (hours)

    Rate of Neutralization

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    4.2 Rate of oil absorption

    These results shows that by using 1g,2g, and 3g of modified charcoal in 20 ml of used cooking oil. Theamount of oil decrease from 20 ml to 18 ml,16 ml, and 14 ml respectively.

    Table 4.2.1 : Rate of oil absorption

    Sample Before After + 1g After + 2g After + 3g

    Amount of oil 20 ml 18 ml 16 ml 14 ml

    Percentage of Absorption 10 % 20 % 30 %

    Diagram 4.2.1 : Graph of rate of oil absorption

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    4.3 Observation of odor removal in kitchen wastewater

    The initial kitchen wastewater released a very foul odor. The modified charcoal of 4g is immersedinto 200 ml of kitchen wastewater in 12 hours at 90 rpm. The observation of odor is taken by interval

    of 4 hours.

    Table 4.3.1 : Observation of odor removal

    DESCRIPTION 4 hours 8 hours 12 hours

    Odor Before

    Treatment

    Foul Foul Foul

    After

    Treatment

    Smelly Less smelly Odorless

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    5.0 CONCLUSION

    In most practical application, kitchen wastewater which is acidic, oil and bad odor can causedisaster to the earth. Kitchen wastewater which are low in pH value (acidic) can cause the soil

    become acidic. Hence, the plant cannot grow healthy. In the other word, the oil from kitchen

    wastewater cause the water such as in river is polluted. The oil will covered the surface of water and

    make the aquatic habitat is threatened. Futhermore, the very bad foul odor in kitchen wastewater

    attract fly and cockcroaches that can cause disease to the human. Besides, it will impose a negative

    view to the enviroment. Therefore, Modified Charcoal from Malaysian durian peel is the best

    solution to neutralize the kitchen wastewater, absorb the oil and remove the bad odor in kitchen

    wastewater to make the world healthier and a better place to live.

    Table 5.0 : Comparison between modified charcoal from durian peels and activated charcoal

    NO Aspect Modified

    Charcoal

    Activated

    Carbon

    Biochar

    1. Sources From waste

    (free)

    From mineral

    (buy)

    Chemical reaction

    (high cost)

    2. Usage Not yet Widely Sometimes

    3. Sludge

    formation

    Less More More

    4. State during

    supply

    Solid Solid powder Solid powder

    5. Cost of making Low cost High cost High cost

    6. Storage Flexible Prevent from

    windy places

    Prevent from

    windy places

    7. Toxic effect on

    human

    Non-toxic Dangerous

    (skin irritaion)

    Non-toxic

    8. Solubility Insoluble Insoluble Soluble

    9. Flammablity Non-Flammable Flammale Non-Flammable

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    6.0 RECOMMENDATION

    6.1 People who live near durian orchards or market places that sell durians can

    also collect unwanted durian peels and sell them to a supplier. This can improve the

    view of the surrounding. By collecting the peels, people can find it as an income by

    selling it to a supplier. Other than that, different types of peels can be collected such

    as jackfruit peels and Musang King peels.

    6.2 People managing restaurants or hawkers who sell durians can minimize the

    durian peel leftovers that release bad odors and cannot be decomposed easily in an

    incinerator. They could also manage a side income by selling them to any durian peel

    collectors

    6.3 For further studies, the modified charcoal have a potential to be used in

    agriculture as a soil neutralizer.

    6.4 For further research, the modified charcoal have a potential to be used in

    industry wastewater as a heavy metal adsorbent.

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    7.0 ACKNOWLEDGEMENT

    In the name of Allah the Almighty,the most Merciful, we would like to give infinite

    gratitude to Him for without His blessings and guidance this research would have

    been impossible.As the saying goes, we mere humans can only plan but Allah is the

    one who decides.

    We would like to thank our teacher Madam Shajaratuddur binti Hussin who

    has always been giving us full support in this research. Without her guidance, this

    project would have not been completed. She has given us valuable knnowledges and

    inputs regarding this project. She is just sheer quality

    Lets not forget our fellow teachers and friends who have helped us

    tremendously during the course of this project albeit directly or indirectly for without

    their moral support we couldnt have got this far. Last but not least, we would like to

    thank the staff and students of Putra Malaysia University for enabling us to visit their

    offices and guide us throughout this project.

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    8.0 REFERENCES

    Durian

    http://en.wikipedia.org/wiki/Durian

    Acessed on 10 March 2014

    Durian peels great to mop up marine oil spills

    http://www.aimst.edu.my/faculties/applied_sciences/media/3.The_MalayMailOnline_May_

    4_2011.pdf

    Accessed on 14 March 2014

    Activated CarbonActivated Charcoal Odor absorber

    http://www.innofresh.com/activated-carbon/

    Accessed on 14 March 2014

    Making Activated Carbon from Food Waste (The CCC Method)https://www.youtube.com/watch?v=dM1MMJJ3c08

    Accessed on 20 March 2014

    Durian Peel as Biosorbent for Removal of Cadmium ions from Aqueous Solution

    http://www.eric.chula.ac.th/jer-en/download/v32y2553/v32n1y2553/ar2v32n1y2553.pdf

    Accessed on 23 March 2014

    Actvated Charcoal Price

    https://www.sciencelab.com/page/S/PVAR/SLC1189

    Accessed on 2 April 2014

    Acceptable Conditions for Discharge of Industrial Effluent or Mixed Effluent

    http://sekitarsynergy.blogspot.com/2012/03/effluent-standard-discharge-limits-for.html

    Accessed on 4 April 2014

    Litre to cubic centimetre converter

    http://www.metric-conversions.org/volume/liters-to-cubic-centimeters.htm

    Accessed on 18 April 2014

    http://en.wikipedia.org/wiki/Durianhttp://en.wikipedia.org/wiki/Durianhttp://www.aimst.edu.my/faculties/applied_sciences/media/3.The_MalayMailOnline_May_4_2011.pdfhttp://www.aimst.edu.my/faculties/applied_sciences/media/3.The_MalayMailOnline_May_4_2011.pdfhttp://www.aimst.edu.my/faculties/applied_sciences/media/3.The_MalayMailOnline_May_4_2011.pdfhttp://www.innofresh.com/activated-carbon/http://www.innofresh.com/activated-carbon/http://www.innofresh.com/activated-carbon/http://www.innofresh.com/activated-carbon/https://www.youtube.com/watch?v=dM1MMJJ3c08http://www.eric.chula.ac.th/jer-en/download/v32y2553/v32n1y2553/ar2v32n1y2553.pdfhttps://www.sciencelab.com/page/S/PVAR/SLC1189https://www.sciencelab.com/page/S/PVAR/SLC1189http://sekitarsynergy.blogspot.com/2012/03/effluent-standard-discharge-limits-for.htmlhttp://sekitarsynergy.blogspot.com/2012/03/effluent-standard-discharge-limits-for.htmlhttp://www.metric-conversions.org/volume/liters-to-cubic-centimeters.htmhttp://www.metric-conversions.org/volume/liters-to-cubic-centimeters.htmhttp://www.metric-conversions.org/volume/liters-to-cubic-centimeters.htmhttp://sekitarsynergy.blogspot.com/2012/03/effluent-standard-discharge-limits-for.htmlhttps://www.sciencelab.com/page/S/PVAR/SLC1189http://www.eric.chula.ac.th/jer-en/download/v32y2553/v32n1y2553/ar2v32n1y2553.pdfhttps://www.youtube.com/watch?v=dM1MMJJ3c08http://www.innofresh.com/activated-carbon/http://www.innofresh.com/activated-carbon/http://www.aimst.edu.my/faculties/applied_sciences/media/3.The_MalayMailOnline_May_4_2011.pdfhttp://www.aimst.edu.my/faculties/applied_sciences/media/3.The_MalayMailOnline_May_4_2011.pdfhttp://en.wikipedia.org/wiki/Durian
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    ATTACHMENT

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    MSDS - ACTIVATED CARBON

    May 21 2013 12.00 PM

    Section 1 : Chemical Product and Company Identification

    Product Name : Charcoal, Activated, Powder

    Catalog Codes : SLC3982, SLC1189

    CAS# : 7440-44-0

    RTECS : FL7243500

    TSCA : TSCA 8(b) inventory: Charcoal, Activated

    CI# : Not available.

    Synonym :

    Chemical Name : Charcoal, Activated

    Chemical Formula : C

    Contact Information : Sciencelab.com, Inc. 14025 Smith Rd. Houston, Texas 77396

    US Sales: 1-800-901-7247 International Sales: 1-281-441-4400

    Order Online: ScienceLab.com

    CHEMTREC (24HR Emergency Telephone), call: 1-800-424-9300

    International CHEMTREC, call: 1-703-527-3887

    For non-emergency assistance, call: 1-281-441-4400

    Section 2 : Composition and Information on Ingredients

    Composition:

    Name : Charcoal, Activated

    CAS # : 7440-44-0

    % by Weight : 100

    Toxicological Data on : Charcoal, Activated

    Ingredients

    LD50 : Not available.

    LC50 : Not available

    Section 3 : Hazards Identification

    Potential Acute : Slightly hazardous in case of skin contact (irritant), of eye contact (irritant),

    Health Effects of ingestion, of inhalation.

    Potential Chronic Health Effects :DEVELOPMENTAL TOXICITY : Not available. The substance is toxic to mucous membranes.

    The substance may be toxic to lungs. Repeated or prolonged

    exposure to the substance can produce target organs

    damage.

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    Section 4 : First Aid Measures

    Eye Contact : Check for and remove any contact lenses. In case of contact, immediately

    flush eyes with plenty of water for at least 15 minutes. Get medical attention

    if irritation occurs.

    Skin Contact : Wash with soap and water. Cover the irritated skin with an emollient. Get

    medical attention if irritation develops.

    Inhalation : If inhaled, remove to fresh air. If not breathing, give artificial respiration. If

    breathing is difficult, give oxygen. Get medical attention.

    Serious Inhalation : Evacuate the victim to a safe area as soon as possible. Loosen tight clothing

    such as a collar, tie, belt or waistband. Seek medical attention.

    Ingestion : Do NOT induce vomiting unless directed to do so by medical personnel.

    Never give anything by mouth to an unconscious person. If large quantities ofthis material are swallowed, call a physician immediately. Loosen tight

    clothing such as a collar, tie, belt or waistband.

    Section 5 : Fire and Explosion Data

    Flammability of the Product : Flammable.

    Auto-Ignition Temperature : 452C (845.6F)

    Fire Hazards in Presence : Highly flammable in presence of open flames and sparks, of heat. of

    Various Substances Non-flammable in presence of shocks.

    Fire Fighting Media and Instructions:

    Flammable solid.

    SMALL FIRE : Use DRY chemical powder.

    LARGE FIRE : Use water spray or fog. Cool containing vessels with water jet in

    order to prevent pressure build-up, autoignition or explosion.

    Section 6 : Accidental Release Measures

    Small Spill : Use appropriate tools to put the spilled solid in a convenient waste disposal

    container.

    Large Spill : Spontaneously combustible solid. Stop leak if without risk. Absorb with an inert

    material and put the spilled material in an appropriate waste disposal. Obtain advice

    on use of water as spilled material may react with it. Do not touch spilled material.

    Prevent entry into sewers, basements or confined areas; dike if needed. Eliminate all

    ignition sources. Cover with wet earth, sand or other non-combustible material. Call

    for assistance on disposal. Be careful that the product is not present at a

    concentration level above TLV. Check TLV on the MSDS and with local authorities.

    Section 7 : Handling and Storage

    Precautions : Keep away from heat. Keep away from sources of ignition. Ground all equipment

    containing material. Do not breathe dust. Keep away from incompatibles such as

    oxidizing agents, metals, acids.

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    Storage : Store in a segregated and approved area. Keep in a cool and ventilated area away

    from combustible materials. Keep container in a cool, well-ventilated area. Keep

    container tightly closed and sealed until ready for use. Avoid all possible sources of

    ignition (spark or flame).

    Section 8 : Exposure Controls/Personal Protection

    Engineering Controls : Use process enclosures, local exhaust ventilation, or other engineering

    controls to keep airborne levels below recommended exposure limits. If user

    operations generate dust, fume or mist, use ventilation to keep exposure to

    airborne contaminants below the exposure limit.

    Personal Protection : Safety glasses. Lab coat. Dust respirator. Be sure to use an

    approved/certified respirator or equivalent. Gloves.

    Personal Protection in : Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self contained

    Case of a Large Spill breathing apparatus should be used to avoid inhalation of the product.Suggested protective clothing might not be sufficient; consult a specialist

    BEFORE handling this product.

    Exposure Limits : TWA: 3.5 (mg/m3) from ACGIH (TLV) [United States] TWA: 4 (mg/m3)

    [United Kingdom (UK)] Respirable. TWA: 10 (mg/m3) [United Kingdom (UK)]

    Total. TWA: 2 (mg/m3) [Canada] Respirable.Consult local authorities for

    acceptable exposure limits.

    Section 9 : Physical and Chemical Properties

    Physical state and appearance : Solid. (Solid powder.)

    Odor : Odorless.

    Taste : Not available.

    Molecular Weight : 12.01 g/mole

    Color : Black

    pH (1% soln/water) : Not applicable.

    Boiling Point : Not available.

    Melting Point : 3500C (6332F)

    Critical Temperature : 6810C (12290F)

    Specific Gravity : 3.51 (Water = 1)

    Vapor Pressure : Not applicable.

    Solubility : Insoluble in cold water, hot water.

    Section 10 : Stability and Reactivity Data

    Stability : The product is stable.

    Conditions of Instability : Heat, ignition sources (flames, sparks), air,incompatible materials

    Incompatibility with : Reactive with oxidizing agents, metals, acids.

    various substances

    Corrosivity : Non-corrosive in presence of glass.

    Special Remarks on Reactivity : Incompatible with air, unsaturated oils, 2-Nitrobenzaldehyde, strong

    oxidizers such as fluorine, chlorine trifluoride, and potassium

    peroxide.

    Polymerization : Will not occur.

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    Section 11 : Toxicological Information

    Routes of Entry : Inhalation. Ingestion.

    Toxicity to Animals :

    LD50: Not available.

    LC50: Not available.

    Chronic Effects on Humans:

    Causes damage to the following organs : mucous membranes.

    May cause damage to the following organs : lungs.

    Other Toxic Effects on Humans : Slightly hazardous in case of skin contact (irritant), of ingestion, of

    inhalation.

    Special Remarks on Toxicity to Animals : Not available.

    Special Remarks on Chronic Effects on Humans : May cause adverse reproductive effects.

    Special Remarks on other Toxic Effects on Humans:

    Acute Potential Health Effects:

    Skin : May cause skin irritation.

    Eyes : May cause eye irritation.

    Inhalation : May cause respiratory tract irritation.

    Ingestion : May cause aspiration pneumonitis, vomiting, decreased

    gastrointestinal transit time, gastrointestinal obstruction,

    constipation, a charcoal-containing empyema, intestinal perforation,

    charcoal deposits in the esophageal and gastric mucosa, rectal ulcer.

    Chronic Potential Health Effects:

    Skin : Chronic skin exposure can result in clogging of hair follicles,

    rendering them black.

    Inhalation : Chronic inhalation can cause carbon particles to accumulate in the

    lungs. It may cause a pneumoconiosis called "Black Lung Disease" or

    "Coal Workers Pneumoconiosis". This is seen in coal workers, but no

    evidence has been found for the equivalent with occupational

    exposure to activated carbon (charcoal)

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    FROM TRASH TO TREASURE : ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL 18

    1. SAMPLE PREPARATION

    Durian peels were washed until no durian

    flesh is left.

    Durian peels were cut into pieces of 5cm.

    The durian peels that were cut into pieces

    are dried for 24 hours.

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    FROM TRASH TO TREASURE : ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL 19

    The dried durian peels are burned in a can

    wrapped with aluminium foil with a smallhole for 45 minutes to turn it into charcoal.

    The charcoals are washed to remove stainsand ashes on the charcoal.

    The washed charcoals are dipped in 25% of

    NaCl solution for 24 hours to transform

    them into modified charcoal.

    The modified charcoals are dried in an

    oven at the temperature of 120C for 3

    hours.

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    FROM TRASH TO TREASURE : ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL 20

    EXPERIMENTAL DESIGNBasis 4g in 200ml formulation to find the optimum pH (7)

    3. EXPERIMENTAL DESIGN

    To find the optimum of rate of absorption in oil

    The initial pH of kitchen wastewater is

    measured, which is 4.2. The kitchen

    wastewater is measured 200 ml and

    transferred into a beaker.

    4g of modified charcoal are added into the

    kitchen wastewater and been stirred at 90

    rpm by using magnetic stirrer

    pH measurement at 1 hour interval are

    taken until the 12th hour

    The result is converted into a line graph.

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    FROM TRASH TO TREASURE : ORGANIC NEUTRALIZER, OIL AND ODOR REMOVAL 21

    3 mesuring cylinder is filled with 20 ml of

    used cooking oil respectively.

    1g, 2g, and 3g of MC are immersed into

    the 20 ml of used cooking oil

    After 12 hours, MC is taken out and the

    used cooking oil are measured

    The result shows that 1g of MC absorb 2

    ml of used cooking oil