Environmental Risk - Concentration in Water, Sludge and Soil - Report Writing Assignment Help

Assignment Task:

A company wants to introduce a new ingredient, compound X, in a shampoo they have on the market for a number of years. Based on the fate and toxicity data collected in the literature, your mission is to evaluate the risk that this new compound may represent for soil and aquatic organisms. Follow the steps below: 

Step 1: Exposure assessment: Predict concentration in water, sludge and soil (PEC) Main release pathway: public use, domestic wastewater, treated in a sewage treatment plant (STP). Treated water is discharged in a river and the sludge is applied to soil. 

Wastewater → STP → effluent → PECsurface water for aquatic organisms 

→ sludge → PECsludge → PECsoil for terrestrial organisms 

1.1. determine the emission in wastewater (Table 1) 1.2. determine the distribution between water and sludge 1.3. calculate PEC values for surface water, sludge and soil 

Step 2: Hazard assessment: What concentration is acceptable? 2.1. determine the Predicted No Effect Concentration for aquatic and soil organisms by considering the data presented in Table 2, 3 and 4. 

Step 3: Risk assessment 3.1. Calculate the risk quotient and characterize the risk (Table 5). 3.2. Would you authorize this new ingredient from an environmental perspective? (discuss briefly why)

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