Recent progress in sensing nitrate, nitrite, phosphate, and ammonium in aquatic environment

Mahmud, Arafat; Ejeian, Fatemeh; Azadi, Shohreh; Myers, Matthew; Abbassi, Rouzbeh; Razmjou, Amir; Asadnia, Mohsen

doi:10.1016/j.chemosphere.2020.127492

Cited by 136 publications

(59 citation statements)

References 163 publications

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“…Ao morrerem, estes vegetais são decompostos por bactérias que utilizam o oxigênio dissolvido na água, desoxigenando o ambiente e trazendo consequências negativas para peixes e outros organismos que o habitam. 31,32,33 Para minimizar os danos causados, principalmente pelo excesso de NO 3 -, diversas técnicas podem ser utilizadas para removê-lo da água, como a osmose reversa, a troca iônica e o tratamento biológico, todos com vantagens e desvantagens específicas. 34 Já no solo, pode ser utilizado inibidores de nitrificação para impedir a conversão de NH 4…”

Section: Riscos Ambientaisunclassified

Ammonium Nitrate: Good or Bad Guy?

Simplicio¹,

Santos²,

Campos³

et al. 2021

Rev. Virtual Quim.

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Ammonium nitrate (NA) is an inorganic salt that constitutes products used in common practices, such as application in fertilizers, odor control, production of explosive agents and production of propellants for rockets. Its physico-chemical properties demonstrate that it is a highly stable salt, which raises the question about its involvement in numerous explosive accidents recorded worldwide, the most recent being in August 2020 in the city Beirut-Lebanon. Thus, this review article gathers important information and necessary knowledge about this chemical agent, in order to avoid or minimize accidents that may involve NA. Therefore, information was addressed from the economic importance and main applications of NA to the risks and safety measures recommended for the operations of its transportation, storage and use. O nitrato de amônio (NA) é um sal inorgânico constituinte de vários produtos utilizados em práticas comuns, como a aplicação em fertilizantes, controle de odores, produção de agentes explosivos e produção de propelentes para foguetes. Suas propriedades físico-químicas demonstram se tratar de um sal de elevada estabilidade, o que desperta o questionamento sobre o seu envolvimento em inúmeros acidentes explosivos registrados em todo o mundo, sendo o mais recente o ocorrido em agosto de 2020 na cidade Beirute-Líbano. Dessa forma, o presente artigo de revisão reúne informações importantes e de conhecimento necessário acerca deste agente químico, a fim de evitar ou minimizar os acidentes que possam envolver o NA. Assim, foram abordadas informações desde a importância econômica e principais aplicações do NA até os riscos e as medidas de segurança recomendadas às operações de seu transporte, armazenamento e uso.

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Section: Riscos Ambientaisunclassified

Ammonium Nitrate: Good or Bad Guy?

Simplicio¹,

Santos²,

Campos³

et al. 2021

Rev. Virtual Quim.

View full text Add to dashboard Cite

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Section: Distinguish/remove Overlapping Fluorescence Spectramentioning

confidence: 99%

“…Spectral deconvolution is one method proposed to reduce catchment specific factors. This method was expressed in Mahmud et al [126]. They identified nitrate in water by direct UV spectrophotometry, and to solve interferences and overlap high-resolution spectral deconvolution techniques separated the nitrate signal from nitrite and bromide ions and other interfering ions/compounds in seawater.…”

Section: Distinguish/remove Overlapping Fluorescence Spectramentioning

confidence: 99%

Monitoring Approaches for Faecal Indicator Bacteria in Water: Visioning a Remote Real-Time Sensor for E. coli and Enterococci

Offenbaume

Bertone

Stewart

2020

Water

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A comprehensive review was conducted to assess the current state of monitoring approaches for primary faecal indicator bacteria (FIB) E. coli and enterococci. Approaches were identified and examined in relation to their accuracy, ability to provide continuous data and instantaneous detection results, cost, environmental awareness regarding necessary reagent release or other pollution sources, in situ monitoring capability, and portability. Findings showed that several methods are precise and sophisticated but cannot be performed in real-time or remotely. This is mainly due to their laboratory testing requirements, such as lengthy sample preparations, the requirement for expensive reagents, and fluorescent tags. This study determined that portable fluorescence sensing, combined with advanced modelling methods to compensate readings for environmental interferences and false positives, can lay the foundations for a hybrid FIB sensing approach, allowing remote field deployment of a fleet of networked FIB sensors that can collect high-frequency data in near real-time. Such sensors will support proactive responses to sudden harmful faecal contamination events. A method is proposed to enable the development of the visioned FIB monitoring tool.

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“…One such method of automation involves the use of high-frequency optical sensors. However, the reliability and potential successes of optical nitrate sensors is understudied and has been questioned previously [4]. One project relied on real-time sensors for pH, conductance, temperature, turbidity, chlorophyll and dissolved oxygen monitoring in water streams; however, to complete nutrient analyses, manual sampling was required to develop a regression model that could estimate bacterial concentrations [5].…”

Section: Introductionmentioning

confidence: 99%

Development of a Real-Time, Mobile Nitrate Monitoring Station for High-Frequency Data Collection

et al. 2020

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A mobile monitoring station was developed to measure nitrate and physicochemical water quality parameters remotely, in real-time, and at very high frequencies (thirty minutes). Several calibration experiments were performed to validate the outputs of a real-time nutrient sensor, which can be affected by optical interferences such as turbidity, pH, temperature and salinity. Whilst most of these proved to play a minor role, a data-driven compensation model was developed to account for turbidity interferences. The reliability of real-time optical sensors has been questioned previously; however, this study has shown that following compensation, the readings can be more accurate than traditional laboratory-based equipment. In addition, significant benefits are offered by monitoring waterways at high frequencies, due to rapid changes in analyte concentrations over short time periods. This, combined with the versatility of the mobile station, provides opportunities for several beneficial monitoring applications, such as of fertiliser runoff in agricultural areas in rural regions, aquaculture runoff, and waterways in environmentally sensitive areas such as the Great Barrier Reef.

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Recent progress in sensing nitrate, nitrite, phosphate, and ammonium in aquatic environment

Cited by 136 publications

References 163 publications

Ammonium Nitrate: Good or Bad Guy?

Ammonium Nitrate: Good or Bad Guy?

Monitoring Approaches for Faecal Indicator Bacteria in Water: Visioning a Remote Real-Time Sensor for E. coli and Enterococci

Development of a Real-Time, Mobile Nitrate Monitoring Station for High-Frequency Data Collection

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