| Reference |
W.M.G.M. van Loon, J.J. Boon, R.J. de Jong and B. de Groot, Isolation of macromolecular chlorolignosulfonic acids and lignosulfonic acids from pulp mill effluents and the river Rhine using XAD-8 macroporous resin and ultrafiltration, Environ. Sci. Technol. 27, 332-342 (1993) |