Method for producing water-insoluble DNA cross-linked product by ultraviolet irradiation and use of the cross-linked product as environmental purification material

摘要

PROBLEM TO BE SOLVED: To provide a new water-insoluble DNA cross-linked product, and to provide a method for using the cross-linked product as an environmental cleaning material. ;SOLUTION: When the aqueous solution or thin solution film of a water-soluble DNA (for example, a DNA originating from the spermary of salmon) on a support or the thin film of a water-soluble DNA on a support is irradiated with ultraviolet light having wavelengths in the range of 250 to 270 nm, the DNA is changed into the water-insoluble cross-linked product immobilized on the support. Similarly, when the aqueous solution of the water-soluble DNA, for example, impregnated into a cellulose fiber nonwoven fabric is irradiated with the ultraviolet light having wavelengths in the range of 250 to 270 nm, the cellulose fiber nonwoven fabric coated with the water-insoluble cross-linked polymer of the DNA is formed. The cross-linked product can absorb intercalating agents into DNA or endocrine disruptors in an extremely low concentration state in a largely high yield. The cross-linked product similarly adsorbs toxic metals such as Hg ion in a water-insoluble state. Thereby, the cross-linked product is useful as an environmental cleaning material.;COPYRIGHT: (C)2001,JPO