[en] The paper gives a review of the experimental results on oxidation of beryllium under deuterium (D) ion irradiation and deuterium retention in beryllium oxide. Irradiation of Be with keV D ions as well as D atom exposure in the atmosphere of oxygen-containing molecules leads to oxygen incorporation into the sample. The results of detailed studies on oxygen incorporation into beryllium under 3 keV D ion bombardment at 300 and 700 K are presented in this paper. Furthermore, retention of deuterium implanted in beryllium oxide in the temperature range from at 300 to 700 K is analyzed. (author)