how was minamata bay remediated?

Question

that incident in japan with the spreading off mecury..

does anyone know how it was remediated or what methods they used to clean it up? coz i couldnt find it anywhere on the internet..did they even clean it up in the end? im sure they would have since it killed so many people.

Answer 1

The fish contamination basically stopped when the plant stopped discharging mercury. The residual mercury seems to have been absorbed by the sediment on the bottom. Still, they continued to discourage fishing, installed nets to prevent contaminated fish from swimming away (mercury in small amounts doesn't poison fish), and dredged the contaminated sediment.

Much more detail here:

http://www.env.go.jp/en/chemi/hs/minamata2002/ch4.html

Answer 2

Minamata Bay Incident

Answer 3

The conventional methodology for remediation of major rivers, bays, harbors is usually dredging.