18 Questions
How does sorption in soil affect the mobility of Organochlorine Pesticides (OCPs)?
Reduces mobility
Which of the following is NOT a degradation pathway for OCPs?
Fermentation
Which environmental condition favors the reduction reaction in the degradation of OCP residues?
Low oxygen levels
What type of compounds are hydrolyzed through the hydrolysis pathway?
Esters
How does photolysis contribute to the degradation of OCP residues?
Direct photolysis contributes to degradation
What role does microbial population play in the biotic degradation of OCP residues?
It accelerates the degradation by providing energy
What is the role of water in photochemical reactions?
Creates hydroxyl radicals
Which compound can organisms convert OCPs into as part of detoxification or metabolic processes?
Trichloroacetic acid (TCAA)
In what form can Methylosinus trichosporium OB3b produce methane monooxygenase to convert trichloroethylene?
Trichloroacetic acid (TCAA)
What do hydroxyl radicals participate in within photochemical reactions?
Mediating xenobiotic transformation
Which process is NOT involved in the photochemical reactions mentioned in the text?
Halogenation
What can soil extracts with halogenating potential contribute to the formation of from organic acids like humic acid?
Trichloroacetic acid (TCAA)
Which process influences the degradation of OCPs due to their association with micro-organic compounds?
Sorption and binding by organic soil components
What is a significant property of OCPs that contributes to their high stability against degradation in the environment?
Low solubility in water
Which organisms tend to accumulate OCPs and are an important part of the food chain?
Benthic organisms like crabs and shrimps
What is one important factor influencing the residue levels of OCPs in sediment?
Particle size distribution
Which process could contribute to the degradation of OCP residues through exposure to light?
Volatilization and photodecomposition
What is a key role of microorganisms in the degradation of OCP residues?
Contributing to biotic degradation
Learn about the influence of various factors such as suspended sediments, dissolved ions, and dissolved organic matter on the degradation rate of organochlorine pesticides (OCPs) in freshwater environments. Explore how sorption in soil affects the mobility of OCPs and the role of physicochemical soil characteristics.
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