dalton

Incorrect. The dalton represents the weight of a single hydrogen atom.

Correct! The dalton is equivalent to the weight of a single hydrogen atom.

Incorrect. While the dalton can be used to calculate molecular weight, it doesn't directly represent size.

Incorrect. Density is a separate property, not directly related to the dalton.

Incorrect. Volume is not directly related to the dalton's role in treatment efficiency.

Incorrect. While knowing the contaminant is important, the dalton helps with understanding its removal.

Correct! The dalton helps calculate the molecular weight of contaminants, informing pore size selection for effective filtration.

Incorrect. Cost is influenced by many factors, not just the dalton's value.

Incorrect. The dalton is crucial for understanding pharmaceutical structure and designing effective filters.

Incorrect. The dalton helps predict reaction rates and optimize chemical dosages for heavy metal removal.

Correct! Water consumption is not directly related to the concept of the dalton.

Incorrect. The dalton helps understand the molecular changes during pesticide degradation.

Incorrect. While water scarcity is important, the dalton's role is more related to contaminant removal and water quality.

Correct! As the need for clean water increases, understanding contaminants and treatment becomes crucial, further highlighting the dalton's significance.

Incorrect. While cost is a factor, the dalton's importance is driven by the need for efficient and effective treatment.

Incorrect. Desalination is a separate process; the dalton's role is more focused on contaminant removal from existing water sources.

Incorrect. Volume measurement is not directly related to the dalton's function.

Incorrect. Identification is important, but the dalton helps with understanding contaminant behavior and removal.

Correct! The dalton is essential for understanding the molecular properties of contaminants and designing effective treatment solutions.

Incorrect. While the dalton is crucial, other units are also employed in water treatment research.

Here are two possible treatment methods and how the molecular weight of 250 Da is relevant:

1. Activated Carbon Adsorption:

   • Relevance: Activated carbon is a porous material with a high surface area, effectively adsorbing molecules based on their size and properties. The contaminant's molecular weight of 250 Da suggests it is relatively large, making it more likely to be adsorbed by activated carbon.
   • Explanation: Activated carbon filters can be designed to remove organic contaminants, including pharmaceuticals, based on their molecular weight. The larger the molecule, the more likely it is to be captured by the carbon's surface area.

2. Membrane Filtration:

   • Relevance: Membrane filtration uses semi-permeable membranes with specific pore sizes to separate contaminants based on their molecular weight.
   • Explanation: A membrane with a pore size smaller than 250 Da would effectively block the contaminant's passage while allowing water molecules to pass through. This method is effective for removing pharmaceuticals, particularly those with larger molecular weights.