In 34 Hijri, Hazrat Abu Talha (ra) passed away at the age of 70 in Medina and his funeral was led by Hazrat Uthman (ra). However, according to the people of Basra, he passed away during a journey on sea and was buried on an island.
(al-Tabaqaat-ul-Kubra li ibn Sa‘d, Vol. 3, p. 385, Dar-ul-Kutub al-Ilmiyyah, Beirut, 1990)