Effects of environmental factors on the transformation of phosphine in seawater
磷化氢在海水中的转化及其影响因素研究

Laboratory experiments were carried out to explore the transformation process of phosphine in seawaterand the effects of environmental factors, such as illumination conditions, oxidation conditions and addition mode.The influences of ultraviolet irradiation, solar irradiation and darkness conditions on the transformation processwere compared. The results indicated that phosphine concentration in the upper atmosphere decreased and PO43?,total phosphorus concentrations in the bottom seawater increased as time went on. The transformation rates of PO43? and total phosphorus after 24 hours were 28.7% and 34.3% respectively. The results also revealed that some environmentalfactors, such as solar irradiation, oxidation conditions and slow addition mode, especially ultraviolet irradiationshould be responsible for the transformation of phosphine to PO43? and total phosphorus.