ACCUMULATION OF NATIVE ARSENIC IN ACID SULPHATE SOILS IN ALBERTA

1987 ◽  
Vol 67 (2) ◽  
pp. 317-331 ◽  
Author(s):  
M. J. DUDAS
Keyword(s):  
Trace Elements ◽  
Iron Oxides ◽  
Soil Series ◽  
Arsenic Acid ◽  
Acid Sulphate ◽  
Acid Sulphate Soils ◽  
Mineral Partitioning ◽  
Lower Slope ◽  
Normal Background ◽  
Forms Of Iron

Acid sulphate soils belonging to the Boundary and Josephine soil series were analyzed for As to determine mineral partitioning, form, and redistribution of the element. Samples of soil, natrojarosite, and zones enriched in iron oxides were collected from upper and lower slope positions. Levels in bulk samples were 10 times higher and levels in some Fe oxides were 100 times higher than normal background abundances. Arsenic was partitioned into silt and clay fractions and appeared related to the distribution of iron oxides in the size separates. Most of the translocated As accumulated in the vein-like network of segregated iron oxide in fractures extending downward from B horizons. These vein samples contained as much as 450 mg As kg−1, primarily as adsorbed As associated with both crystalline and amorphous forms of iron. Microbiologically mediated losses of As had depleted surface horizons of the element. The weathering of pyrite is believed to account for the accumulations of As in acid sulphate soils. Key words: Arsenic, acid sulphate soil, iron oxyhydroxides, trace elements

The Use of Drilling Solid Waste as Amendment of Acid-Sulphate Soils of the Orinoco Delta

1996 ◽  
Author(s):  
P. Vasquez ◽  
J. Urich ◽  
V. Gonzalez ◽  
P. Silva ◽  
A. Rodriguez
Keyword(s):  
Solid Waste ◽  
Acid Sulphate ◽  
Acid Sulphate Soils ◽  
Orinoco Delta

Export of Acidity in Drainage Water from Acid Sulphate Soils

2000 ◽  
Vol 41 (7-12) ◽  
pp. 319-326 ◽  
Author(s):  
F.J Cook ◽  
W Hicks ◽  
E.A Gardner ◽  
G.D Carlin ◽  
D.W Froggatt
Keyword(s):  
Drainage Water ◽  
Acid Sulphate ◽  
Acid Sulphate Soils

Prevention, Reclamation and Management of Acid and Acid Sulphate Soils

2017 ◽  
pp. 337-363
Author(s):  
A. Krishna Chaitanya ◽  
Shrikant Badole ◽  
Arbind Kumar Gupta ◽  
Biplab Pal
Keyword(s):  
Acid Sulphate ◽  
Acid Sulphate Soils

scholarly journals Stream plant chemistry as indicator of acid sulphate soils in Sweden

2008 ◽  
Vol 14 (1) ◽  
pp. 83 ◽  
Author(s):  
K. LAX
Keyword(s):  
Surface Waters ◽  
Stream Water ◽  
Low Ph ◽  
Fontinalis Antipyretica ◽  
Acid Sulphate ◽  
Fine Grained ◽  
Acid Sulphate Soils ◽  
Trace Element Chemistry ◽  
Study Results ◽  
The Impact

Results from the biogeochemical mapping (roots of aquatic plants and Fontinalis antipyretica) conducted by the Geological Survey of Sweden (SGU) reflects the metal load of surface waters draining acid sulphate (AS) soils in Sweden. In this study, results from the biogeochemical, soil geochemical and Quaternary mapping programmes at SGU were used to investigate the impact of fine-grained deposits hosting AS soils on stream water trace element chemistry in two separate areas. In the area around Lake Mälaren, postglacial sediments contain the highest levels of most trace elements studied. Owing to the low pH of AS soils and subsequent leaching, levels of nickel (Ni), cobalt (Co), copper (Cu), sulphur (S), yttrium (Y), uranium (U), tungsten (W), and molybdenum (Mo) were significantly elevated in aquatic roots. Levels were lower in the Skellefteå area, which may be explained by lower concentrations in source deposits. Concentrations of arsenic (As) and lead (Pb) were normal or impoverished in biogeochemical samples from postglacial, finegrained sediment areas. Maps based on ratios (Ni:Pb or Y:Pb) in biogeochemical samples can, together with results from Quaternary mapping, be used to predict areas with AS soils in Sweden.;

scholarly journals A comparison of nitrogen and carbon reserves in acid sulphate and non acid sulphate soils in western Finland

2008 ◽  
Vol 14 (1) ◽  
pp. 57 ◽  
Author(s):  
M. PAASONEN-KIVEKÄS ◽  
M. YLI-HALLA
Keyword(s):  
Groundwater Level ◽  
Agricultural Practices ◽  
Density Field ◽  
Mineral N ◽  
Total N ◽  
N Retention ◽  
Acid Sulphate ◽  
Agricultural Catchments ◽  
Acid Sulphate Soils ◽  
C And N

Previous studies suggest that nitrogen (N) loads from acid sulphate soil (AS soil) catchments in Finland are higher than those from other agricultural catchments. This study seeks to explain this difference by measuring carbon (C) and N profiles in both an AS soil and a neighbouring non AS soil. In Lapua, western Finland, two adjacent fields (Dystric Cambisols), subjected to similar agricultural practices, were analysed to the depth of 240 cm for pH, total C (Ctot), total N (Ntot), NH4 +-N, NO3 --N, sulphur and bulk density. Field A, an AS soil, contained sulfidic materials and 0.9% Ctot below 170 cm, while Field B, not an AS soil, had 0.3% Ctot in the subsoil and no sulfides. In these soils, the groundwater level declined below 200 cm in summer, subjecting the subsoil to oxidation. This study revealed large stocks of Ctot, Ntot, and mineral N in the subsoil, particularly in the AS soil. At 20–240 cm, Field A contained 292 tons of Ctot ha-1 and 25 tons of Ntot ha-1, while Field B had 152 tons of Ctot ha-1 and 11 tons of Ntot ha-1. Field A contained up to 435 kg of mineral N ha-1 in autumn, while in Field B there was only up to 137 kg of mineral N ha-1. In Field A, NH4 +-N dominated strongly, while NO3 --N dominated in Field B. It is suggested that the greater concentration of mineral N in the AS soil is due to 1) a greater stock of total (mineralizable) N and 2) the slower rate of nitrification resulting in substantial NH4 +-N retention on cation exchange sites.;

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