Chemistry and treatment of ground water in the Vojvodina

Stauder, Stefan

doi:10.2166/ws.2007.071

Cited by 4 publications

(1 citation statement)

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“…Moreover, concentrations of arsenic (III), ammonia, methane, boron, sodium and in part also iron (II) and manganese (II) are over the permitted levels. For example, arsenic (As) concentrations can be very high, in the range of 0.2 mg/l, as indicated in the case of some deeper wells in the area of Novi Becej and Zrenjanin (Stauder 2007). The substances mentioned are dissolved in the water for geogenic reasons, as is often the case in confined thick sedimentary complexes.…”

Section: Introductionmentioning

confidence: 99%

Evaluating Bank Filtration as an Alternative to the Current Water Supply from Deeper Aquifer: A Case Study from the Pannonian Basin, Serbia

Stauder

Stevanović

Richter³

et al. 2011

Water Resour Manage

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Groundwater from a depth of 100-200 m is the main source of public water supply in most municipalities in the Pannonian basin in central and southeastern Europe. Even though its quality does not always meet EU standards for drinking water-including those regarding arsenic-in many villages and even in some major cities no treatment except chlorination takes place. Of the several alternatives to improve the water supply situation in the Autonomous Province of Vojvodina in the northern part of the Republic of Serbia, re-orientation towards more centralized systems combined with river bank filtration as an additional and sustainable raw water resource was evaluated as the best. A hydrogeological and hydrochemical survey of the Tisa (or Tisza) River alluvium in the Padej test field confirmed the aptness of this approach. A good connection between the Tisa River bed and the alluvial aquifer consisting of fine-grained sand was found (average hydraulic conductivity of 5×10 −5 m/s). With appropriately designed and managed wells, 80-100 l/s bank filtrate per km of river bank can be produced for water supply. Comprehensive analysis of the river water and river bank filtrate as well as a pilot treatment of the bank filtrate suggest that aeration-oxidation-flocculation-filtration-disinfection is a suitable technology for the Tisa River bank filtrate.

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Section: Introductionmentioning

confidence: 99%

Evaluating Bank Filtration as an Alternative to the Current Water Supply from Deeper Aquifer: A Case Study from the Pannonian Basin, Serbia

Stauder

Stevanović

Richter³

et al. 2011

Water Resour Manage

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Geochemistry and arsenic behaviour in groundwater resources of the Pannonian Basin (Hungary and Romania)

Rowland

Omoregie

Millot

et al. 2011

Applied Geochemistry

123

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International audienceThe geochemistry of groundwaters from the Pannonian Basin (Hungary and Romania) were analysed to elucidate the general geochemistry and processes controlling elevated levels of arsenic. Using cluster analysis 4 main groups were identified. Group 4, influenced by geothermal and saline inputs (Na-HCO3 to Na-Cl type, high Li, Si, NH4 and B, low δ7Li values) with low As levels (mean 33.1 μg/L, range <0.5 to 240 μg/L). Group 3 waters, sampling only dug wells with geochemistry influenced by rain water and surface contamination (Ca-Mg-HCO3 type, elevated K, NO3, S(tot) and Cl) and also with low As (mean 1 μg/L, range <0.5 to 2.1 μg/L). Groups 1 and 2 represented general reducing groundwaters of the area (Mg/Ca-HCO3 to Na-HCO3). Despite such similarities, both groups had different redox characteristics, (i) group 1 indicative of waters dominated by methanogenesis (high CH4, low to absent S(tot)), (ii) group 2 indicative of waters dominated by SO4-reduction (low CH4, moderate S(tot)), and (iii) both group 1 and 2 having similar ranges of Fe concentrations indicating that Fe-reduction is occurring equally in both groups. Arsenic levels in group 1 (methanogenesis) were high, ranging from 23.4 to 208 μg/L (mean 123 μg/L) and predominantly as As(III). Levels in group 2 (SO4-reducing) were much lower, ranging from <0.5 to 58 μg/L (mean 11.5 μg/L), again predominantly as As(III). Typically low levels of As in group 4 waters (geothermal), combined with positive correlations between δ7Li and As(tot) indicate that elevated As is not from an external input, but is released due to an in-aquifer process. Geochemical reasoning implies As mobilisation is controlled by redox-processes, most likely reductive dissolution of As bearing Fe-oxides, known to occur in sediments from the area. More important however is an overlying retention mechanism determined by the presence or absence of SO4.. Ongoing SO4-reduction will release S2-, removing As from solution either by the formation of Assulphides, or from sorption onto Fe-sulphide phases (group 2). In the group dominated by methanogenesis (group 1), any As released by reductive dissolution is not removed from solution and can rise to the high levels observed. Levels of organic carbon are thought to be the ultimate control on the redox conditions in these 2 groups. High levels of organic carbon (as found in group 1) would quickly exhaust any SO4 present in the waters, driving the system to methanogenesis and subsequent high levels of As. Group 2 has much lower concentrations and so SO4 is not exhausted. Therefore, As levels in waters of the Pannonian Basin are controlled not by release but by retention mechanisms, ultimately controlled by levels of TOC and SO4 in the waters

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Comparative assessment of water treatment using polymeric and inorganic coagulants

Manda¹,

Chidya

Saka

et al. 2016

Physics and Chemistry of the Earth, Parts A/B/C

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Chemistry and treatment of ground water in the Vojvodina

Cited by 4 publications

References 0 publications

Evaluating Bank Filtration as an Alternative to the Current Water Supply from Deeper Aquifer: A Case Study from the Pannonian Basin, Serbia

Evaluating Bank Filtration as an Alternative to the Current Water Supply from Deeper Aquifer: A Case Study from the Pannonian Basin, Serbia

Geochemistry and arsenic behaviour in groundwater resources of the Pannonian Basin (Hungary and Romania)

Comparative assessment of water treatment using polymeric and inorganic coagulants

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