[shardakar]

In what form does arsenic exist in seawater? And how Toxic is this? I've heard that it exists mainly as Arsenate or AsO4. Can anyone confirm this?

What are some of the options for removal of arsenic from seawater and what levels can currently available technology bring it down to? I understand that WHO standards for drinking water are a max of 10ppb.

Thanks in advance for the help.