Nitrogen behavior during artificial groundwater recharge through ponds: A case study in Xiong’an New Area

Xu, Guigui; Su, Xiaosi; Yuan, Zhijiang; Ji, Liang; Li, Ningfei; Liang, Haiting

doi:10.1007/s10653-021-01041-7

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…It was obviously illustrated that the DO (free oxygen O 2 ) as the O-atom donor played an important role to change NO 2 -N compounds into NO 3 -N compounds by catching the electrons of N(+ III) in NO 2 -N compounds (Bae et al, 2019; Wang et al, 2020; Bai et al, 2022). The e uent concentrations pictured simultaneously in Fig.3Ato Fig.3Cwere not statistically signi cant at the level of p < 0.05 meaning that the organic pollutants like BOD just offered as one of the raw materials to prop up the necessary biological metabolism in the AA to the outlet weirs of the designed reactors of which it was evidently visualized that the designed reactors could well remediate the NO 2 -N contaminated waters at the conditions of high DO concentrations, which was not relating to the original concentrations of the added N amounts(Bae et al, 2019;Xu et al, 2022).…”

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Fates of Nitrogenous Contaminants of Eutrophic Waters Using Laboratory Microcosm Method in Interception-Activation-Combined Bioreactors

Zhu

et al. 2022

Preprint

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For understanding the internal transformations of the nitrogen in nitrogenous contaminants like ammonia nitrogen (NH3-N), nitrite nitrogen (NO2-N) and nitrate nitrogen (NO3-N) in natural waters, the remediation effects of the designed reactors on NH3-N, NO2-N and NO3-N were well carried out, respectively. It was not like the NO3-N contaminants which would be rapidly whittled down within any concentrations of this experiment, meanwhile the concentrations of the NH3-N and NO3-N contaminants were respectively reduced by nitrification and denitrification from 5.00 mg/L and 10.00 mg/L in influents under the conditions of dissolved oxygen concentrations of 5.0 ± 0.6 mg/L and the redox potential (ORP) about + 213 ± 37 mV at 20.0 ± 0.5℃ of water temperature to no more than 2.0 mg/L in effluents. Both NH3-N and NO3-N concentrations were under the limited concentrations of the level V of GB 3838 − 2002 with the help of the aerobic granular sludges (AGS) cultured and collected from the interception-reaction galleries (IRG) of the reactors of characteristics of 0.20–2.00 mm in statistical particle diameter (93 ± 4% m/m), ash contents of 7 ± 5% m/m and the degradation capacities of 0.88 ± 0.13 (mg nitrogen)/(mg sludge). Thereafter, it was not decreased as expected to the finial acceptable concentration of the prospective value of 2.00 mg/L with the original concentration of 15.00 mg/L in influents. Thus, the processes of the nitrogenous contaminants could be remediated within the concentrations of the rage of no more than 10.00 mg/L, especially both NH3-N and NO3-N to friendlily purify the natural waters without any other exogenous powers and more energy consumptions to the environment.

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confidence: 89%