Distribution, source and evolution of nitrate in a glacial till of southern Alberta, Canada

Hendry, M. Jim; McCready, R. G. L.; Gould, W. Douglas

doi:10.1016/0022-1694(84)90121-5

Cited by 56 publications

(33 citation statements)

References 15 publications

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“…Occurrence of NO 3-in the oxidized zone and NH4 + in the unoxidized zone was also described by Lind and Pedersen (1976), Hendry et al(1984), Ernstsen and Lindgreen (1985) and Ernstsen (1989), but in these studies no efforts were made to subdivide the oxidized zone. Tritium (3H) and NO 3 profiling at SBX ( Figure 5) and another 7 sites revealed that initially NO3-rich recharge water younger than 1963 was recovered NO3-free at 0.5 m to 8 m below the redox interface.…”

Section: Discussionmentioning

confidence: 65%

“…Also for clayey till of southern Alberta, Canada, Hendry et al (1984) demonstrated a close correlation Copyright 9 1996, The Clay Minerals Society between the redox environment and the distribution of NO 3 , that is, high concentrations of NO3 in oxidized till and low concentrations within unoxidized clay. The biological denitrification rates were low for samples from both oxidized and unoxidized till and increased rates were primarily localized within fractures with facilitated transport of organic matter from the soil surface or adjacent inherent fragments of organic matter (micro-sites) (Fujikawa and Hendry 1991).…”

Section: Introductionmentioning

confidence: 81%

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Reduction of Nitrate By Fe²⁺ in Clay Minerals

Ernstsen

1996

Clays and clay miner.

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In the 12 km 2 catchment area of Syv creek, Denmark, moderate to high concentrations of nitrate (NO3-) occurred in the upper part of the oxidized zone (oxic-I), but dropped within the lower suboxic part (oxic-II), to below the detection limit in the unoxidized zone. Structural Fe 2+ in the clay minerals made up 10 to12% of the Fe in the oxidized zone and increased to approximately 50% in the unoxidized zone. Concurrent with changes in the distribution of structural Fe 2+ the clay mineral constituents changed. Vermiculite was typically found in the oxidized zone whereas chlorite was found in the unoxidized zone only. A conversion of illite and chlorite into vermiculite seems to take place. A significant correlation between NO 3 and the amount of reduced Fe 2 § in the suboxic (oxic-II) zone, indicates that primary structural Fe 2+ in the clay minerals is the reductant in a NO 3 reduction process.

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Section: Discussionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 81%

Reduction of Nitrate By Fe²⁺ in Clay Minerals

Ernstsen

1996

Clays and clay miner.

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“…3c and 3d). Elevated NO 3 − –N (100 to 450 mg L −1 ) and Cl − are common in oxidized till and fine lacustrine sediments below the level of tritium detection in southern Alberta (Hendry et al, 1984; Rodvang et al, 1998). Nitrate tends to increase with depth throughout oxidized fine‐textured sediments.…”

Section: Resultsmentioning

confidence: 99%

Changes in Ground Water Quality in an Irrigated Area of Southern Alberta

2004

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Few studies have documented spatial and temporal variations in ground water quality in areas with high densities of animal farming operations (AFOs), or the long-term effects on surface-water quality. Changes in ground water quality were characterized in an irrigated area with a high density of AFOs in southern Alberta, Canada to evaluate the effect on ground water quality of manure application to fields. Fifty-five piezometers in the oxidized zone were sampled once or twice annually from 1995 to 2001, and temporal changes were analyzed using mixed model analysis. Average NO3- -N increased significantly from 12.5 to 17.4 mg L(-1) and average Cl- increased significantly from 19.4 to 34.4 mg L(-1) in piezometers installed in an unconfined sand aquifer at locations receiving fertilizer and manure. Compared with these manured locations, nitrate and chloride concentrations were significantly lower in shallow aquifer water in areas of pasture or native range, and concentrations did not change significantly with time. Nitrate and chloride concentrations in shallow ground water in fine-textured manured locations did not change significantly. Ground water below about 6 m in till and fine lacustrine sediments contains 18O signatures indicative of recharge under preirrigation or glacially influenced conditions, suggesting this ground water has a low vulnerability to agricultural contamination. Evaluations suggest that shallow ground water discharge will cause NO3- -N and Cl- in the Oldman River to increase by factors of at least 4.3 and 1.3, respectively, with more significant effects in smaller streams and under low-flow conditions.

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“…Nitrate contamination is often associated with nitrogen fertilizers, barnyard manure, and septic systems used on farms and by rural residents. However, some aquifers in Alberta contain water with nitrate concentrations as high as 1800 mg L -1 (Hendry et al 1984;Pupp et al 1989). Madison and Bruett (1985) found in a U.S. water quality survey that nitrate levels greater than 3 mg L -1 were generally anthropogenic in nature.…”

Section: Nitratesmentioning

confidence: 99%

Farm Well Water Quality in Alberta

Fitzgerald

Chanasyk

Neilson

et al. 2001

Water Quality Research Journal

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On-farm groundwater supplies in 85, 64, 36, 34, 23, 19, 6, 2, 1 and 0.1 % of the samples, respectively). The majority of the higher concentrations of most inorganic parameters are due to natural geological conditions defined by source aquifer mineralogy. The effects of primary agriculture are likely limited to the 3% herbicide detections and to some nitrate and microbiological contaminations observed; this water should not be used for human consumption without some form of site-specific treatment. Some rural residents may be "mistreating" their water, and a general lack of water testing among rural residents was noted.

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Distribution, source and evolution of nitrate in a glacial till of southern Alberta, Canada

Cited by 56 publications

References 15 publications

Reduction of Nitrate By Fe²⁺ in Clay Minerals

Reduction of Nitrate By Fe²⁺ in Clay Minerals

Changes in Ground Water Quality in an Irrigated Area of Southern Alberta

Farm Well Water Quality in Alberta

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Distribution, source and evolution of nitrate in a glacial till of southern Alberta, Canada

Cited by 56 publications

References 15 publications

Reduction of Nitrate By Fe2+ in Clay Minerals

Reduction of Nitrate By Fe2+ in Clay Minerals

Changes in Ground Water Quality in an Irrigated Area of Southern Alberta

Farm Well Water Quality in Alberta

Contact Info

Product

Resources

About

Reduction of Nitrate By Fe²⁺ in Clay Minerals

Reduction of Nitrate By Fe²⁺ in Clay Minerals