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HEAVY METAL IONS
SOME METAL IONS ARE GOOD! Fe 2+, K +, Ca 2+, Mg 2+ Essential to the health of humans. May be in water but mostly get in food we eat.
HEAVY METAL IONS ARE HARMFUL! Lead- Pb 2+ Mercury- Hg 2+ 1)Bind to proteins preventing them from doing their intended tasks 2)Damage to nervous system, brain, kidneys, and liver
LEAD (PB) Sources in environment: 1)Paint- most paints no longer contain lead 2)Automobile batteries 3)Leaded gasoline until 1970’s 4)Lead pipes in older homes
MERCURY Sources in environment; 1)Fluorescent light bulbs 2)Medical thermometers 3)Formally used in antiseptics and pesticides
MAD HATTER- DUE TO MERCURY POISONING
Water Pollution NATURAL TYPES OF POLLUTANTS Many diseases are transferred by water bodies causing harmfull effects on human health, i.e. cholera,
Food Safety & Toxicology (4). Definitions Food contaminants are substances that are included unintentionally in foods. Some are harmless and others are.
Section C. Solubility Solubility – amount of substance that can be dissolved in a certain amount of water at a certain temperature Saturated – Max amount.
Harshini Wickremasinghe May 5, 2011 Bio 464. Physical/Chemical Properties Silvery, heavy, mobile, liquid phase Only liquid metal at room temp. Odorless.
Heavy Metal Toxicity earthref.org/SCC Scripps Classroom Connection.
C.6 Acid Contamination Acids and Bases. Acids Most acids are molecular compounds. All acids start with a hydrogen atom(s). Characteristics of acids: Sour.
Health Risk and Toxins Essential Question: how do we determine what is harmful to us?
Solubility of Solids in Water
Lead Poisoning St. Albans Health Department. Lead Poisoning in Children One of the most common environmental child health problems today Caused by too.
Science 10 Mr. Francis 5.3 – Bioaccumulation and Biomagnification.
Mercury in the Water A Global Problem.
MERCURY Hg Properties and Uses of MERCURY Properties- Mercury is a silvery white metal The valence is usually 1 or 2 The gravity is
AIM: What are some inorganic pollutants that can contaminate our water
. Symbol: Hg Atomic number: 80 Moderately active Mercury reacts at about 350°C to form Mercury II oxide 2Hg(s) + O 2 (g) → 2HgO(s) A red powder.
Persistent Bioaccumulative Toxins And why we shouldn’t eat them.
PURE AND IMPURE WATER B.12. Do you drink chemically pure H 2 O? What is the difference between chemically pure versus “clean” H 2 O?
Are you safe in here????. … no you are not !!! What is lead poisoning? Lead poisoning occurs when a person swallows lead or breathes in its fumes. Leads.
C ONTAMINANTS IN W ATER Applied Chemistry. Contaminants in water can include Heavy Metal Ions, molecular substances, solvents, and inappropriate levels.
DVD. List the 4 Greek Elements Air, Earth, Fire, Water QUESTION 1.
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