Comment: |
no protolyse constant, SSD, SSA; diagenetic Mn oxyhydroxide isolated in situ by vertically inserting inert collectors into the sediment of McFarlane lake located near Sudbury, Ontario; circumneutral McFarlane (pH=7.40); mixture of poorly crystallized Mn oxyhydroxides; C(org)/Mn molar ratio 3.4+/-1.5 (humic acid, fulvic acid); traces of Cd, Cu, Ni, Pb, Zn; overlying water with 410+/-39 µM Ca, 214+/-8 µM Mg, 1430+/-60 µM Na, 33+/-8 mM K, 227+/-14 µM SO4, 1790+/-35 µM Cl, c(org) 5.2+/-1.2 mg C/l |