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Experimental Assessment of Rates of Nitrate Removal by River Bed Sediments
Author(s) -
WYER M.,
KAY D.
Publication year - 1989
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1989.tb01524.x
Subject(s) - nitrate , potassium , sediment , nitrogen , sodium nitrate , environmental chemistry , potassium nitrate , ammoniacal nitrogen , chemistry , sodium , hydrology (agriculture) , environmental science , zoology , environmental engineering , geology , inorganic chemistry , biology , paleontology , geotechnical engineering , organic chemistry
C oncentrations OF C hloride , nitrate‐N, sulphate, sodium, ammoniacal‐N and potassium were monitored for six days in 20 riverine sediment‐water flow tank experiments. Only nitrate‐N and ammonical‐N showed consistent patterns over a period of time. Nitrate‐removal rates ranged from −15 mg N/m 2 .d (coarse material) to +49 mg N/m 2 .d (fine sediment) when the initial concentration of nitrate‐N was 2 mg/1. An increase in initial concentration to 11 mg/1 produced corresponding removal rates of 67–241 mg N/m 2 .d. Likely removal mechanisms are discussed. The results suggest management possibilities for stream bed ecosystems and raw water impoundments with respect to nitrogen cycling.