Question

When drill cutting dumped on the seabed which toxic is produced?

(a) Toxic nitrites

(b) Toxic fluorides

(c) Toxic sulphides

(d) Toxic hydrates

This question was posed to me during an online interview.

My question is taken from Effects and Control Measures of Marine Pollution in division Environmental Pollution of Energy Management

Answer 1

Right choice is (c) Toxic sulphides

For explanation I would say: When drill cuttings dumped on the seabed and it creates anoxic conditions. These anoxic conditions result in the production of toxic sulphides in the bottom sediment, thus eliminating the benthic fauna.