Erratum to: Evaluation of Water Quality Functions of Conventional and Advanced Soil-Based Onsite Wastewater Treatment Systems (Journal of Environmental Quality, (2015), 44, 3, (953-962), 10.2134/jeq2014.06.0277)

Document Type

Article

Date of Original Version

5-1-2020

Abstract

J.A. Cooper, G.W. Loomis, D.V. Kalen, & J.A. Amador. (2015). J. Environ. Qual. 44:953–962. https://doi.org/10.2134/jeq2014.06.0277 We discovered an error in our article, involving the use of an incorrect value for the ideal gas law constant, R, of 1.08205, instead of the correct value 0.08205. We also discovered an incorrect conversion from moles of N2O to moles of N, 1 mole N/mole of N2O was used instead of the correct value of 2 moles of N/mole of N2O). The incorrect value of R and mole conversion were used in N2O gas flux calculations. This affects a number of values presented in the article, noted below, although the changes do not have a material effect on interpretation of the results or the implications of the study. Error on p. 956: In Equation 1, the correct value for R is 0.08205, not 1.08205. Error on p. 959: Old incorrect text: The flux of N2O was significantly higher from SND (63 μg N m−2 h−1) and GEO (55 μg N m−2 h−1) than from P&S (3 μg N m−2 h−1). Corrected text (changes in bold): The flux of N2O was significantly higher from SND (1653 μg N m−2 h−1) and GEO (1453 μg N m−2 h−1) than from P&S (86 μg N m−2 h−1). Error on pp. 959–960: Old incorrect text: We calculated a mass balance for N entering and exiting the drainfields to help quantify loss pathways (Fig. 4). In P&S, outputs (514 g N m−2 yr−1) of N accounted for 87.6% of inputs (588 g N m−2 yr−1) to the drainfield, with 12.4% (74 g N m−2 yr−1) unaccounted for. Loss of N occurred mainly as dissolved N species, comprised of NO3 (83%), organic N (16%) and NH4 (1%). Nitrous oxide in gas and dissolved phases accounted for 0.04% of N outputs, suggesting N2O production was not a major loss pathway in P&S. 4 FIGURE (Figure presented.) Corrected Figure 4. Changes to overall N Out, N2Oflux, and unaccounted N for all three systems S8 FIGURE (Figure presented.) Corrected Supplemental Figure S8. Correction of values using R = 0.08205 and correct mole conversion resulted in 26.3754 times higher values in the correct graph. The relative proportion of N2O-N flux between treatments remained the same. Nitrogen was better accounted for in SND and GEO, with outputs (2194 and 2170 g N m−2 yr−1) accounting for 95.1 and 94.1% of inputs (2306 g N m−2 yr−1), respectively. Loss of N occurred mainly as dissolved N species, comprised of NO3 (84–85%), organic N (14–15%) and NH4 (<1%). Nitrous oxide in the gas and dissolved phase accounted for 0.08% of N loss in SND and GEO, indicating this was not an important pathway for net N loss in either drainfield type. Corrected text (changes in bold): We calculated a mass balance for N entering and exiting the drainfields to help quantify loss pathways (Fig. 4). In P&S, outputs (515 g N m−2 yr−1) of N accounted for 87.6% of inputs (588 g N m−2 yr−1) to the drainfield, with 12.4% (73 g N m−2 yr−1) unaccounted for. Loss of N occurred mainly as dissolved N species, comprised of NO3 (83%), organic N (16%) and NH4 (1%). Nitrous oxide in gas and dissolved phases accounted for 0.2% of N outputs, suggesting N2O production was not a major loss pathway in P&S. Nitrogen was better accounted for in SND and GEO, with outputs (2208 and 2182 g N m−2 yr−1) accounting for 95.8 and 94.6% of inputs (2306 g N m−2 yr−1), respectively. Loss of N occurred mainly as dissolved N species, comprised of NO3 (84–85%), organic N (14–15%) and NH4 (<1%). Nitrous oxide in the gas and dissolved phase accounted for 0.6–0.7% of N loss in SND and GEO, indicating this was not an important pathway for net N loss in either drainfield type.

Publication Title, e.g., Journal

Journal of Environmental Quality

Volume

49

Issue

3

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