S. Kapoor et C. Gopinathan, REDUCTION AND AGGREGATION OF SILVER IONS AND MIXED AGGREGATES IN AQUEOUS-SOLUTIONS OF CARBOXYMETHYL CELLULOSE, Radiation physics and chemistry, 49(1), 1997, pp. 51-57
Citations number
15
Categorie Soggetti
Nuclear Sciences & Tecnology","Chemistry Physical","Physics, Atomic, Molecular & Chemical
Radiolytic reduction of silver ions and its aggregates were studied in
aqueous carboxy methyl cellulose (CMC) solutions. The early processes
of silver gets affected in the presence of CMC via complexation. The
ratio of silver ions to CMC chains decreases Or accelerates' the proce
sses that involve silver ions. Presence of excess silver ions enhances
the stability of small clusters in the presence of CMC. Mixed aggrega
tes of thallium/silver and cadmium/silver get stabilised in the presen
ce of CMC. It is concluded that Co+ do not transfer electron to Pb2+ a
nd Tl+. Also, no electron transfer reaction was observed between eithe
r Tl-2(+) and Co2+ or Pb-o and Cd2+. However, Zn+ transfers electron t
o Pb2+ and Tl-2(+) transfers electron to Cu2+ With a rate of 4.2x10(7)
M(-1) s(-1) and 3.5x10(9) M-l s(-1), respectively. The reactions are
discussed in terms of the electrochemical potential of the metal ions
(or metals) involved. Copyright (C) 1997 Elsevier Science Ltd