Which product control method utilizes material that the hazardous material will cling to the outer edges of, but will not soak in?

Which product control method utilizes material that the hazardous material will cling to the outer edges of, but will not soak in?

• A. Absorption
• B. Filtration
• C. Dilution
• D. Adsorption

Answer: (D)

Adsorption is about grabbing the hazard onto the surface of a material rather than letting it soak in. When a hazardous material is treated with an adsorbent, the molecules cling to the outer surfaces of the material—think of a fine powder or a carbon-based substance catching and holding contaminants on its surface. This makes the contaminant stay on the surface where it can be contained or removed, without penetrating into the material itself. This differs from absorption, where the liquid or vapor would be drawn into and spread inside the material, like a sponge soaking up liquid. Filtration uses a barrier to trap particles, not by adhering them to a surface, and dilution simply reduces concentration without capturing the material on a surface. So the method that matches “cling to the outer edges, not soak in” is adsorption, often using materials like activated carbon or similar adsorbents.

Adsorption is about grabbing the hazard onto the surface of a material rather than letting it soak in. When a hazardous material is treated with an adsorbent, the molecules cling to the outer surfaces of the material—think of a fine powder or a carbon-based substance catching and holding contaminants on its surface. This makes the contaminant stay on the surface where it can be contained or removed, without penetrating into the material itself.

This differs from absorption, where the liquid or vapor would be drawn into and spread inside the material, like a sponge soaking up liquid. Filtration uses a barrier to trap particles, not by adhering them to a surface, and dilution simply reduces concentration without capturing the material on a surface. So the method that matches “cling to the outer edges, not soak in” is adsorption, often using materials like activated carbon or similar adsorbents.