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Rates of Nitrate and Perchlorate Removal in a 5‐Year‐Old Wood Particle Reactor Treating Agricultural Drainage
Author(s) -
Robertson W.D.,
Ptacek C.J.,
Brown S.J.
Publication year - 2009
Publication title -
groundwater monitoring and remediation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 47
eISSN - 1745-6592
pISSN - 1069-3629
DOI - 10.1111/j.1745-6592.2009.01231.x
Subject(s) - nitrate , drainage , perchlorate , environmental science , particle (ecology) , hydraulic conductivity , environmental engineering , hydraulic retention time , environmental chemistry , chemistry , hydrology (agriculture) , wastewater , soil science , soil water , ecology , geotechnical engineering , geology , ion , organic chemistry , biology
Abstract A 5‐year‐old wood particle reactor treating agricultural tile drainage in southern Ontario was monitored for its ongoing ability to treat both nitrate (NO 3 – ) and perchlorate (ClO 4 – ). Prior to sampling undertaken in the fifth year of operation, a highway safety flare containing ClO 4 – was immersed in the inlet pipe elevating influent ClO 4 – concentrations to up to 33.7 μg/L. ClO 4 – removal rates were inhibited in the presence of more than 1 to 2 mg/L NO 3 – ‐N, but increased rapidly to about 60 μg/L/d upon NO 3 – depletion. Nitrate removal rates, measured subsequently in the sixth and seventh years of operation, varied with temperature in the range of 2 to 16 mg N/L/d, but remained similar to rates measured in the second year. Additionally, no deterioration in the hydraulic conductivity (K) of the coarse core layer (0.5