| 1 |
What is the primary role of transition metal ion catalysts in the catalytic ozonation process for nanoplastic removal?
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To decrease the reaction time without enhancing removal efficiency |
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7 |
-.50
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+35%
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| 2 |
According to the article, what was the observed effect of using Co2+ at 1 mM on the mineralization rate of polystyrene nanoplastics during ozonation?
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Decreased mineralization rate by 70% |
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7 |
-.50
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| 3 |
In the context of nanoplastics removal, what does the scavenger experiment with methanol demonstrate about the catalytic ozonation process?
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Methanol decreases the overall removal efficiency |
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7 |
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| 4 |
If the initial concentration of nanoplastics is 20 mg/L and the catalytic ozonation achieves a 70% mineralization rate, what is the concentration of remaining nanoplastics?
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6 mg/L |
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7 |
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| 5 |
Given an ozone flow rate of 0.5 NL/min and an ozonation time of 120 minutes, how much ozone (in grams) has been used if the ozone concentration is 10 mg/NL?
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60 grams |
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7 |
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| 6 |
If reducing the turbidity of water by catalytic ozonation with Co2+ from 100 NTU to 35 NTU represents a 65% reduction, what was the original turbidity?
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100 NTU |
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7 |
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| 7 |
What is a major benefit of catalytic ozonation over single ozonation in water treatment?
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It provides higher mineralization rates |
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7 |
-.50
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-35%
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| 8 |
Which of the following is NOT a transition metal ion used as a catalyst in the study?
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Ca2+ |
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7 |
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| 9 |
What environmental issue does the removal of nanoplastics address?
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Soil fertility enhancement |
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7 |
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| 10 |
What analytical technique is NOT mentioned as used for monitoring the degradation of nanoplastics?
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Mass Spectrometry |
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7 |
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| 11 |
What effect does the melt fiber spinning system have on the crystallinity of PET fibers?
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It decreases the crystallinity to less than 10%. |
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7 |
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| 12 |
What role does the spooling speed play in the fiber spinning system described in the article?
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Spooling speed has no impact on fiber characteristics. |
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7 |
-.50
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| 13 |
According to the article, what was the impact of using the LCC-ICCG enzyme on PET depolymerization?
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It had no significant impact compared to other enzymes. |
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7 |
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| 14 |
If the initial mass of PET before enzymatic treatment in a bioreactor was 500 grams and 96.9% mass was lost due to depolymerization, what is the final mass of PET?
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15.5 grams |
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7 |
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| 15 |
Considering the average crystallinity of PET fibers after treatment is 9.7%, what would be the crystallinity if the process conditions were unaltered but the drop distance doubled?
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It would remain the same due to other compensating factors. |
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7 |
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| 16 |
If the surface area to volume ratio of PET increased 15-fold due to processing, and the initial ratio was 0.1 mm²/mm³, what is the new ratio?
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0.15 mm²/mm³ |
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7 |
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| 17 |
What is a major advantage of the melt fiber spinning system over traditional recycling methods?
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Reduces the need for high capital investment |
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7 |
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| 18 |
What does the term 'amorphous content' refer to in the context of PET recycling?
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The unstructured, non-crystalline state of PET |
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7 |
-.50
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-35%
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| 19 |
What is the primary benefit of reducing the crystallinity of PET in recycling processes?
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It increases the mechanical strength of the recycled PET. |
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7 |
-.50
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-35%
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| 20 |
Which measurement technique was used to assess the polymer spectra to confirm the presence of PET?
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Fourier Transform Infrared Spectroscopy |
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7 |
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