Cellulose: a biopolymeric sorbent for heavy-metal traces in waters.
The sorption of dissolved heavy-metal traces on natural cellulose is characterized for the lower mug l . range. It proceeds relatively rapidly, with half-times of about 1.5 min. At neutral pH-values the distribution coefficients (K(d)) of many cations, of various types, e.g., Al(3+), Be(2+), Cd(2+), Cr(3+), Fe(3+), Pb(3+), Zn(2+), between cellulose and electrolyte solutions (e.g., Nad) are of the order 10(1)-10(4). In alkaline salt solutions K(d) as high as 10(5) can be attained. The role of cellulose as a sorbent for metal traces in natural waters is discussed.
Burba
P
P
Institut für Spektrochemie und angewandte Spektroskopie, Postfach 778, D-4600 Dortmund 1, Federal Republic of Germany.
Willmer
P G
PG