Photocatalytic oxidation of aqueous ammonia in model gray waters

Zhu, Xingdong; Nanny, Mark A.; Butler, Elizabeth C.

doi:10.1016/j.watres.2008.02.003

Cited by 25 publications

(10 citation statements)

References 27 publications

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“…The initial concentration of TOC was approximately 67 mg/L, i.e., approximately 67% of the naphthenic acids mass consisted of carbon. The concentration of n-butyl chloride was measured by headspace gas chromatography with flame ionization detection [22].…”

Section: Photochemical Experimentsmentioning

confidence: 99%

Comparison of four advanced oxidation processes for the removal of naphthenic acids from model oil sands process water

Liang

Zhu

Butler

2011

Journal of Hazardous Materials

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Section: Photochemical Experimentsmentioning

confidence: 99%

Comparison of four advanced oxidation processes for the removal of naphthenic acids from model oil sands process water

Liang

Zhu

Butler

2011

Journal of Hazardous Materials

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“…They found that photodegradation decreases in the following order: anionic > nonionic > cationic surfactants, and postulated that photocatalysis was mainly a surface reaction due to the short lifetime of hydroxyl radicals. Sanchez et al [20] successfully obtained 65% dissolved organic carbon (DOC) removal with hotel grey water at 29 mgL −1 initial DOC concentration while Zhu et al found [21] that photocatalysis can effectively remove carbonaceous and nitrogenous biochemical oxygen demand from synthetic grey waters. Photocatalysis has also been reported to be efficient in the disinfection of E-coli [22], a microorganism bound to be present in wastewater that had had contact with humans.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Treatment of Shower Water Using a Pilot Scale Reactor

Boyjoo

Ang

Pareek

2012

International Journal of Photoenergy

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Treatment of shower water deserves special consideration for reuse not only because of its low pollutant loading but also because it is produced in large quantities. In this study, a pilot scale study of photocatalytic degradation of impurities in real shower water was performed in a 31 L volume reactor using titanium dioxide as the photocatalyst. The reactor was operated in a continuous slurry recirculation mode. Several operational parameters were studied including the slurry initial pH, catalyst concentration, air flow rate, and slurry recirculation rate. Up to 57% of total organic carbon (TOC) elimination was obtained after 6 hours of treatment (for 3.0 slurry initial pH, 0.07 gL −1 catalyst concentration, 1.8 Lmin −1 air flow rate, and 4.4 Lmin −1 slurry recirculation rate). This study showed that photocatalysis could be successfully transposed from bench scale to pilot scale. Furthermore, the ease of operation and the potential to use solar energy make photocatalysis an attractive prospect with respect to treatment of grey water.

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“…The application of electrochemical ammonia sensors is diverse and exists in many settings such as automotive , chemical , clinical , environmental and food analysis. A number of ammonia sensors are available for these applications .…”

Section: Introductionmentioning

confidence: 99%

A Printed and Microfabricated Sensor Device for the Sensitive Low Volume Measurement of Aqueous Ammonia

Brannelly

Killard

2016

Electroanalysis

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The measurement of low concentrations of ammonia in small sample volumes is required in biological, biomedical and environmental measurement applications. However, achieving this without instrumentation remains challenging. Here, sensor devices for the measurement of ammonia in a liquid were developed. These were based on the fabrication of polyaniline nanoparticle films onto screen printed interdigitated electrodes using inkjet printing and their integration into a polymer microfabricated device with polytetrafluroethylene membrane and air flow path between the membrane and the sensor. Samples of ammonia in phosphate buffered saline of 52 μL were measured using electrochemical impedance. While water vapour and ions from the buffer did result in a decrease in sensor impedance, this was eradicated by displacement of the headspace above the sensor with air. This, in combination with the adjustment of the sample to pH to 11 allowed the quantification of ammonia from 0 to 200 μM with a limit of detection of 25 μM. The device has the potential to be used for sensitive, low volume measurement applications of ammonia at point‐of‐test and point‐of‐care.

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Photocatalytic oxidation of aqueous ammonia in model gray waters

Cited by 25 publications

References 27 publications

Comparison of four advanced oxidation processes for the removal of naphthenic acids from model oil sands process water

Comparison of four advanced oxidation processes for the removal of naphthenic acids from model oil sands process water

Photocatalytic Treatment of Shower Water Using a Pilot Scale Reactor

A Printed and Microfabricated Sensor Device for the Sensitive Low Volume Measurement of Aqueous Ammonia

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