Chapter 02 · Nature, land & waterWater, Waste & Pollution
Heavy metals
Definition
Heavy metals are metallic elements such as lead, mercury, cadmium or arsenic that can be toxic or persistent at certain concentrations or exposures.
References
This reference provides supporting context for how “Heavy metals” is defined and used.
Overview
What it means in practice
Heavy metals should be read as a pollution, water or waste term. Its meaning depends on the pollutant, source, pathway, location, threshold and measurement method.
In practice, users should state the boundary, source, measurement basis and evidence. That keeps heavy metals specific enough for review without turning it into a broader claim.
Why it matters
Heavy metals matters because pollution language can trigger different duties, risk judgments and community concerns depending on concentration, exposure, route and local conditions.
Common misconception
A common error is to use Heavy metals without naming the pollutant, source, threshold or exposure route. Those details are what make the term reviewable.
Review questions
What source, boundary or measurement method gives the term meaning? What evidence supports it? What limitation would change how a reader interprets the claim?
How it is used
In professional practice, “Heavy metals” helps designers, manufacturers, procurement teams, life-cycle practitioners and waste managers describe or assess metallic elements such as lead, mercury, cadmium or arsenic that can be toxic or persistent at certain concentrations or exposures. It is commonly encountered in product design, procurement, footprinting, material selection, production and end-of-life decisions.
A credible application identifies the product system, life-cycle stages, functional unit, geography, timeframe and measurement method.