Zobrazeno 1 - 10
of 31
pro vyhledávání: '"L. Vielvoye"'
Publikováno v:
European Journal of Soil Science. 50:107-115
Radiocaesium fixation in soils is reported to occur on frayed edge sites of micaceous minerals. The weathering of mica in acid soils may therefore influence the Cs+ fixation process and thereby the mobility of the radiopollutant. We produced a labora
Publikováno v:
Langmuir. 14:1072-1080
It is shown that the overall behavior of silica in the presence of hydrolyzed Al solutions (pH range 3 - 4) is drastically modified: the total amount of dissolved silica and the initial rate at which silica passes into solution are increased compared
Publikováno v:
Clay Minerals. 25:129-139
Six deferrated clay (2+-K+exchange equilibria were performed at pH 6 and 0·01nchloride concentration. The amounts of K+specific sites were estimated through a two-site modelling of the exchange isotherm curves. The total and external surface areas o
Publikováno v:
Clay Minerals. 25:141-160
Six clays from volcanic ash soils at different stages of weathering differ in their relative halloysite content with respect to kaolinite and several surface properties, namely CEC, and exchange selectivity for K+. These three parameters are related
Publikováno v:
Journal de pharmacie de Belgique. 45(4)
Mouboumou is a traditional medicine prepared from the inner part of termitarium and is used in traditional medicine in Zaire. In tropical diseases, antimalarial drugs are often used simultaneously with antidiarrheal absorbent drugs, which might, by t
Publikováno v:
Soil Science Society of America Journal. 53:1679-1684
Publikováno v:
Clay Minerals. 15:1-13
Calibration of the internal and external signals appearing at geff ∼4 in the electron paramagnetic resonance (EPR) spectra of twenty-four kaolinites, has led to the recognition of two types of kaolinite-iron. The amount of iron associated with the
Publikováno v:
Journal of Catalysis. 33:169-175
EPR studies of the Fe 3+ impurity in NH 4 -faujasite show that iron can be simultaneously present in the zeolite as three forms: Fe 3+ species in the aluminosilicate framework, Fe 3+ ions (possibly in S 1 , sites) acting as counterions, and Fe 3 O 4
Publikováno v:
Clay Minerals. 11:201-220
The location of iron in five deferrated soil kaolinites and several reference samples has been investigated using chemical analyses, acid dissolution and electron paramagnetic resonance spectroscopy.The iron of most of the kaolinites can be divided i
Publikováno v:
Soil Science. 91:55-65