Aluminium in Lake Cuicocha, Ecuador, an Andean Crater Lake: Filterable, Gelatinous and Microcrystal Al Occurrence
Source: Aquatic Geochemistry, Volume 17, Number 2, March 2011 , pp. 109-127(19)
Abstract:In Lake Cuicocha watershed, a young caldera lake, soils consist of volcanic deposits with a high SiO2 and Al2O3 content; these andisols are in an early stage of development; and in drainage water from the watershed, aluminium concentrations reach 15.0 mol L−1. Total aluminium concentrations in Lake Cuicocha water raises up to 7.2 mol L−1, with nearly 70% occurring as filterable Al at neutral to weak alkaline conditions. Al polymerization to gelatinous aggregates of a few hundred micrometres in diameter as well as the occurrence of Al microcrystals like gibbsite as an ageing product of gelatinous Al polymers was noted in the lake water. The gelatinous Al leads to the formation of larger aggregates resulting in flocs of bacteria, algae, microorganisms and detritus.
Document Type: Research Article
Affiliations: 1: Department of Water Quality Control, Berlin University of Technology, Straße des 17. Juni 135, Sekr. KF 4, 10623, Berlin, Germany, Email: firstname.lastname@example.org 2: Department of Water Quality Control, Berlin University of Technology, Straße des 17. Juni 135, Sekr. KF 4, 10623, Berlin, Germany 3: Department of Water, Environment and Marine Science and Technology (VWS), Berlin University of Technology, Müller Breslau Straße, 10623, Berlin, Germany 4: Department of Electron Microscopy, Berlin University of Technology, Straße des 17. Juni 135, Sekr. ZELMI, 10623, Berlin, Germany 5: Facultad de Ingeniera en Geología, Minas, Petróleos y Ambiental, Quito (FIGEMPA), Universidad Central, Ciudadela Universitaria, Calle Jerónimo Leyton, Quito, Ecuador
Publication date: March 1, 2011