Heavy Metal Contamination
Chemistry ⇒ Environmental Chemistry
Heavy Metal Contamination starts at 10 and continues till grade 12.
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See sample questions for grade 12
A soil sample contains 0.5 mg/kg of lead. If the safe limit is 0.1 mg/kg, by what factor does the sample exceed the safe limit?
Describe how heavy metals can affect aquatic ecosystems.
Describe one way in which heavy metals can enter the human body through the food chain.
Describe the role of pH in the mobility of heavy metals in soil.
Describe two major sources of mercury contamination in the environment.
Explain the difference between bioaccumulation and biomagnification in the context of heavy metal contamination.
Explain the environmental impact of improper electronic waste (e-waste) disposal with respect to heavy metal contamination.
Explain the term 'chelation therapy' in the context of heavy metal poisoning.
Explain the term 'speciation' in the context of heavy metal contamination.
Explain why chelating agents are used in the treatment of heavy metal poisoning.
Explain why children are more vulnerable to lead poisoning than adults.
Explain why heavy metals are considered persistent environmental pollutants.
List three anthropogenic (human-caused) sources of heavy metal contamination.
List two environmental factors that can influence the mobility of heavy metals in soil.
Name two health effects of chronic cadmium exposure.
Which heavy metal is commonly found in batteries and can cause environmental contamination if not disposed of properly?
Which heavy metal is most commonly associated with Itai-Itai disease?
Which heavy metal is most commonly associated with Minamata disease?
A groundwater sample contains 0.08 mg/L of cadmium. If the World Health Organization's guideline value for cadmium in drinking water is 0.003 mg/L, by what factor does the sample exceed the guideline?
A river near an industrial area shows elevated levels of both lead and cadmium. Discuss the possible chemical interactions between these two heavy metals in the aquatic environment and how these interactions might affect their toxicity and mobility.
