Review of separation methods for the determination of ammonium/ammonia in natural water

Zhang, Min; Dong, Xue; Li, Xuejun; Jiang, Yongrong; Yan, Li; Liang, Ying

doi:10.1016/j.teac.2020.e00098

Cited by 34 publications

(8 citation statements)

References 132 publications

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“…After characterizing the capacitance response in the trap solution of 0.5 M H 2 SO 4 , we compared capacitive detection with conductivity detection in terms of their responses to varying background sulfuric acid concentrations. Comparing the two detection methods provides a better understanding of the implementation potential of capacitive detection because conductivity is a more common and currently more convenient method in many detection applications (i.e., many conductivity sensors exist) 32 . The primary drawback of conductivity is its direct link with total ion concentration, such as the background sulfuric acid concentration in the trap solution, which limits sensor sensitivity.…”

Section: Resultsmentioning

confidence: 99%

“…Leveraging selective TAN separations to enable capacitive nitrogen detection in simplified water matrices represents an underexplored and promising direction. 32 We have recently developed a new selective separation method, electrochemical stripping (ECS), to separate TAN from complex waters into a simple acidic matrix. 33 ECS has been demonstrated to extract high-purity TAN from several complex water (e.g., urine, anaerobic digestate) into a sulfuric acid trap solution with over 99% selectivity, leveraging the volatility of TAN and electrochemical pH adjustment.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, capacitive detection may enable sensitive yet simple detection amidst high background concentrations. Leveraging selective TAN separations to enable capacitive nitrogen detection in simplified water matrices represents an underexplored and promising direction 32 …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Selective aqueous ammonia sensors using electrochemical stripping and capacitive detection

Lalwani

Dong

et al. 2021

AIChE Journal

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Managing waterborne ammonia-nitrogen pollution requires monitoring distributed wastewater nitrogen discharges. In this study, we demonstrated and investigated a proof-ofconcept sensor that combines selective electrochemical separation and sensitive capacitive detection for sensing total ammonia nitrogen (TAN). By varying TAN concentration in synthetic ammonia-polluted water (up to 50 mg/L), we selectively separated ammonia nitrogen from feedwater into a sulfuric acid solution, in which capacitance decreased linearly with increasing TAN (R 2 > 0.99). Experimental observations were supported by theoretical explanations for the decrease in capacitance as ammonia absorbs into the sulfuric acid solution and abstracts protons. Capacitive detection facilitated TAN sensing at higher acid concentrations (up to 0.5 M H 2 SO 4 ) than conductivity detection (up to 0.01 M H 2 SO 4 ), which enables sensitive sensors with larger TAN detection ranges, longer deployment, and less complexity. Results from this study provide evidence of the use of selective separations and their transport mechanisms for environmental sensing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selective aqueous ammonia sensors using electrochemical stripping and capacitive detection

Lalwani

Dong

et al. 2021

AIChE Journal

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“…This phenomenon may be elucidated from the different free ammonia concentration in both reactors, which were 180 mg NH3-N/L and 76 mg NH3-N/L for C/N = 20 and C/N = 30 respectively at day 14. At higher pH, the presence of ammonia is more dominant than ammonium [23]. Therefore, the ammonia existence was possible in both reactors as the achieved turned back pH to the same range, 6.6 -7.1.…”

Section: Nitrogen Transformationmentioning

confidence: 97%

The role of C/N ratio on anaerobic decomposition of industrial tempeh wastewater for optimizing methane production

Fransiscus

Simangunsong

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Considering its high organic contents, A biological process, in particular anaerobically decomposition is considered to be the most suitable treatment for industrial tempeh wastewater. Among the important parameters that determine the success level of the process, C/N ratio was mentioned to play a significant role. Thus, this study was carried out to investigate the effects of different C/N ratios (10; 20; 30 and 40) on the decomposition process to produce methane gas. The experiment was conducted using 1L batch reactors with sludge from active cow manure biogas digester as inoculum. Several parameters such as pH, COD, BOD, VFAs and methane gas were monitored during the process to understand the mechanism. The experimental results confirmed that the C/N ratio significantly affected the anaerobic decomposition of tempeh wastewater, giving the best achievement for C/N = 30, with organic removal as high as 89% (COD) and total methane produced as much as 1240 mL in 14 days of observation. The balanced composition between carbon and nitrogen is important for the anaerobic process, higher organic loading (C/N = 40) will potentially lead to VFAs accumulation, meanwhile higher nitrogen concentration (C/N = 10) will stimulate complex transition, mainly denitrification and free ammonia formation. Both conditions will block the methanogenesis stage, resulting in a nonoptimal decomposition process and minimum methane production.

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“…samples with concentrations ranging from 0.1 mg/L to 1000 µg/L (Standard Test Methods for Iron in Water) On the other hand, ammonia is a highly soluble substance and difficult to remove, causing toxicity to living organisms and harming the environment (Yan et al, 2020). As a result, efforts are made to advance the development of methods for the detection and quantification of ammonia dissolved in water (Standard Test Methods for Ammonia Nitrogen In Water), but also ways to mitigate environmental pollution (Hasanoĝlu et al, 2010;Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Melamine-formaldehyde-silica and melamine-silica-cellulose composites in removing Iron and N-ammonia from landfill leachate

Santos

Junior

Silva

et al. 2021

RSD

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Melamine-formaldehyde based composites are versatile and can be applied in the treatment of contaminated effluents such as landfill leachate that have a high pollutant load, as they are rich in nitrogen atoms, the sites allow interaction with molecules, atoms or ions of interest. Aiming compares the efficiency of two materials based on the same precursors, evaluating the efficiency of two composites, melamine-silica (PMF-Si) and melamine-silica-cellulose (Cel-M-Si) in removing iron and ammonia nitrogen in landfill leachate. Adsorption kinetics showed that PMF-Si and Cel-M-Si composites adsorb iron from 30 min, with an average removal of ~ 93.4%. Application of Cel-M-Si to removed leachate ca. 75.7% iron and 76.6% ammonia nitrogen. In contrast, it was observed that PMF-Si had a removal efficiency of 70.9% for iron and 55.0% for ammonia nitrogen. The comparative tests allowed to conclude that the composites PMF-Si and Cel-M-Si have potential for the treatment of landfill leachate, being low cost materials and easy synthesis.

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Review of separation methods for the determination of ammonium/ammonia in natural water

Cited by 34 publications

References 132 publications

Selective aqueous ammonia sensors using electrochemical stripping and capacitive detection

Selective aqueous ammonia sensors using electrochemical stripping and capacitive detection

The role of C/N ratio on anaerobic decomposition of industrial tempeh wastewater for optimizing methane production

Melamine-formaldehyde-silica and melamine-silica-cellulose composites in removing Iron and N-ammonia from landfill leachate

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