Giant oil tankers… engineering fortresses in the face of nightmares of environmental pollution | Environment and climate news

aljazeera.net
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Between the rigor of engineering and the fragility of the ecosystem, supertankers stand as vital arteries of global energy, carrying enough to power entire cities for weeks.

But these “floating castles,” which were designed to overcome sea waves, turn into environmental time bombs in moments of targeting or accidents that threaten marine life for many years, according to Mahmoud Al-Kan’s report on the island.

Safety engineering

The huge tankers carry about 3 million barrels of flammable materials. To ensure that these shipments arrive safely, the maritime industry adopts strict safety standards, starting with the ship’s hull, which is built with two walls separated by a buffer space, to ensure that oil does not leak if the outer hull is compromised.

Protection is not limited to the structure, but extends to the nature of the chemical reactions inside the tanks, where gases such as nitrogen are pumped to reduce the density of oxygen to levels that prevent combustion. The tanker body is also divided into separate chambers, with the aim of confining the leak to a limited space and preventing the entire load from being emptied in the event of a puncture or explosion.

Targeting oil tankers portends environmental disasters (Al Jazeera)

Micrometer disaster

The real danger lies in the physical fact that “oil is lighter than water.” Once a leak occurs, the oil spreads in extremely fine thicknesses measured in micrometers, making one cubic meter capable of covering an area of ​​up to 10,000 square metres.

This thin film, which resembles a leaf in thickness, acts as a poison for marine life, blocking light and oxygen, leading to coral reefs bleaching and dying, fish losing their migratory routes, and seabirds drowning after their feathers become stuck in oil.

Targeting oil tankers portends environmental disasters
“Oil is lighter than water,” which leads to its spread in very fine thicknesses (Al Jazeera)

Response and spillover effects

The incident of the Japanese ship “MV Wakashio” near the Mauritius Islands is a stark example. Although it was not an oil tanker, the leak of only a thousand tons of fuel from its engines caused an environmental disaster whose effects still remain after 5 years, as the oil is still stuck to the roots of trees and coral reefs.

Response teams are racing against time to cordon off the leaks using floating barriers and chemical dispersants that break down the oil to pave the way for its decomposition by bacteria, a process that takes years.

In light of geopolitical tensions and precise wars, the challenge remains. Engineering may give tankers resilience to accidental accidents, but the bigger question remains: How many oceans will pay the price if these fortresses do not withstand the machines of war?



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