leaden/lead compounds

Question

Hello,Can you please  check the yellow parts? Thank oyuBecause of the detrimental effects on human health of the leaden/lead compounds, the content of leaden compounds is even more restricted in petrol. Removing of the lead from the petrol would be present for another 25 years. Non-leaden petrol (Euro 95 and 98) is being (inreasingly) produced more and more by adding fractions of benzine with a high octane number. Isoparaffins and aromatics have the best anti-knocking device.

Alan.es · Accepted Answer

Because of the detrimental effects on human health of lead compounds, the content of lead compounds is even more restricted in petrol. Removing of the lead from the petrol would be present for another 25 years. Non-leaded petrol (Euro 95 and 98) is being produced more and more by adding fractions of benzene with a high octane number. Isoparaffins and aromatics have the best anti-knocking properties.

Note: i haven't a clue as to what te author is trying to say in "Removing of the lead from the petrol would be present for another 25 years".

Kajjo · Answer

Alan.esBecause of the detrimental effects on human health of lead compounds, the content of lead compounds is even more restricted in petrol. Removing of the lead from the petrol would be present for another 25 years. Non-leaded petrol (Euro 95 and 98) is being produced more and more by adding fractions of benzene with a high octane number. Isoparaffins and aromatics have the best anti-knocking properties.

Note: i haven't a clue as to what te author is trying to say in "Removing of the lead from the petrol would be present for another 25 years".

1) Just a guess what the author might want to say: "Even if we would start right now not to use any lead in petrol anymore, it would be detectable in the environment for at least the next 25 years."

2) Just a note, maybe a native can comment on it:
"Because of the detrimental effects on human health of lead compounds" -- Obviously what is meant is "Because of the detrimental effects of lead compounds on the human health". Is it necessary to switch the objects or are both sentences equally well?

3) "adding fractions of benzene with a high octane number" -- This sounds as if there are many different kinds of benzene and in this case we need to add the appropriate sort with a high octane number. However, benzene is a clearly defined substance and what is meant is: "adding fractions of benzene, which has a high octane number."

Kajjo

leaden/lead compounds

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