... composition the water characterization in the
aquifer of the study area fit into the three main types, viz. Na-(K)-Cl-SO
4
, Ca-(Mg)-Na-(K)-SO
4
and Ca-(Mg)-Na-(K)-HCO
3
das reported by the earlier ... which high levels of arsenic were obtained in the soils collected
85
Natural Arsenic in Groundwater: Occurrence, Remediation and Management –
Bundschuh, Bhattacharya...
... geochemical
conditions (an oxidizing environment with neutral pH) that suggest significant immobilization by
73
-7 5
-7 0
-6 5
-6 0
-5 5
-5 0
-1 1
-7
δ
2
Η ‰
δ
18
Ο ‰
-1 0
-9
-8
y = 7.97x + 11.03
Figure 5. ... Mexico D.F. and 10 km east of the historical silver-mining town of Taxco de Alarcón.
It has a population of approximately 9000, living in high-d...
... 2002).
2 ARSENIC AFFECTED FLOOD-DELTA PLAINS IN WEST BENGAL
Pandemic arsenic contamination in the Bengal Basin is essentially confined to the low-lying
Ganga-Brahmaputra flood-delta plain located ... Holocene
entrenched floodplain in parts of lower-middle Gangetic plain in Bihar and eastern UP. Sediment
cover on Pleistocene uplands in the Bengal Basin as well as, in interflu...
... imminent danger. Therefore to provide uniform flow of information, IEC and training mater-
ials that are suitable in the context of Nepal have already been printed and are being distributed in
the ... sand-clay
Sand-silty clay
Gravel
Coarse sand
with gravel
Sand
Sand-silty clay
Sukrauli
Sukrauli
Badera
Badera
Sand-silty clay
Silty sand-clay
Gravel mixed
with silt
Clay
Rampurwa
Rampurw...
... local drinking water standard of 50g/L. The first symptoms of arsenic
related diseases were detected in 1983 within the counties of La Banda and Robles, and in the fol-
lowing year investigations ... pat-
terns and remediation with natural materials. Master Thesis, Dept. of Land and Wat. Res. Eng., KTH,
Stockholm, Sweden, TRITA-LWR-EX-0 3-0 5, 59p.
Martin, A. 1999. Hidrog...
... nutrient recycling process. This is obviously a major concern vis-a-vis soil
pollution and contamination of the food chain through water-soil-crop transfer of contaminants.
This demands special ... irrigation facil-
ities and more than 60% of this irrigation water come from groundwater which is extracted by deep
119
Natural Arsenic in Groundwater: Occurrence, Remediation and...
... Settling of As-rich smelter particulates, wind dispersion of solid tailings, and leachate run-
off from tailings has contaminated soils around smelters and tailings. In addition, natural subsur-
face ... Zimapán inhabitants.
6 CONCLUSIONS
Arsenic is widely distributed in Zimapán. Mining wastes and natural arsenic- bearing mineraliza-
tion release As to water, soils and plan...
... ϽϪ0.254 1.55
Similarity
HCO
3
-
CI
-
Na
+
NO
-
3
Mn
Fe
tot
PO
4
3-
K
+
pH
SO
4
2-
Mg
2+
Ca
2+
EC
As
tot
0
-1 00
-2 00
-3 00
-4 00
-5 00
-6 00
-7 00
-8 00
12345678 9101 1121314
Figure 5. Results of Hierarchical ... precipitation of secondary sulfide minerals like mackinawite. This mineral
is a precursor of pyrite and may incorporate some arsenic,...