effect of chromium carcinogen
TRANSCRIPT
8/2/2019 Effect of Chromium Carcinogen
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ENVIRONMENTAL CHEMISTRY
TITTLE : CHROMIUM
CARCINOGENICS IN WATER
GROUP MEMBERS :
FAIZAH BINTI ISMAIL (UK23274)
NUR FARHANA BINTI ZULKIFLI (UK23533)
NURUL NATRA BINTI AHMAD TARMIDI (UK23535)
NURAZIMAH BINTI MANSOR (UK23672)
WAN NUR SYAKIRAH BINTI WAN YUSOFF (UK23723
8/2/2019 Effect of Chromium Carcinogen
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CHROMIUM IN THE ENVIRONMENT• Mined as chromite (FeCr2O4) ore.
CARCINOGEN• Agent that can cause any cancer.
HEXAVALENT CHROMIUM,Cr(Vl)• Chemical compunds that contain the chromium in +6oxidation states.• Form through natural processes and human activities.• The main human activities that increase chromium(VI) concentrationsare chemical,leather and textile manufacturing and electro painting• It is used for the stainless steel, textiles dyes, wood preservation, anti-corrosion and conversion coatings.• Can cause cancer.
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CHROMIUM
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The Mojave Desert
town of Hinkley,
with population
1900.
The case was highligted
in 2009 by California
and U.S Environmental
protection agency.
Scientist report that the
highest levels of
hexavalent chromium
reported in U.S. ground
water
A controversial of
water treatment.
highest levels of
hexavalent
chromium reported
in U.S. ground water.
The ground water has
concentrations as high as580 parts per billion which
is more than California
drinking water standard.
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compound seeped into
water there from a
Pacific Gas and Electric
facility (PG&E).
The company used it to
inhibit rust in cooling
towers and discharged it
into holding ponds in the
1950s and 1960s.
People used the
water as source of
drinking.
The water cause
people have lung
cancer within 20
years later.
It contracted malignant
tumors in smallintestines with different
doses of hexavalent
chromium.
Scientist tested the
water to the animal
like rat. It was
proved.
The water can cause
cancer and other
disease.
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Hexavalent chromiumChromium Carcinogenic found inmajority of tap water in California
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Unsafe hexavalent chromium levels were found ingroundwater
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Infiltrated the cells of manyorgan including liver &
pancreatic lymph
Mouth cancer
Contract lung cancer
stomach has a very high
reducing capacity
Contract malignant tumors in
small intestine & mouth (rats &
mice)
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Cause of infiltrated cells in body
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http://slidepdf.com/reader/full/effect-of-chromium-carcinogen 12/17Contract lung cancer
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• support a drinking water standard is a
different matter” because extrapolating it tohumans remains controversial.
• set a water guideline called A Public HealthGoal.
• Convert chromium 6 turn it into Chromium3, an essential nutrient that can neutralizedthe stomach by gastric acids.
•
investing in a reverse osmosis filtrationsystem for the home.
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• establish a legal limit for the chemical in tab
water.•more stringent standards limiting theamount of hexavalent chromium allowable in
water supplies.•California and U.S. Environmental ProtectionAgency officials are re-evaluating whatconcentration is safe in water supplies. Withina few weeks, California is expected toannounce a proposal to set a new healthguideline.
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