Nitrate reduction of brines from water desalination plants by membrane electrolysis

Bosko, María Laura; Rodrigues, Marco Antônio Siqueira; Ferreira, Jane Zoppas; Miró, Eduardo Ernesto; Bernardes, Andréa Moura

doi:10.1016/j.memsci.2013.10.004

Cited by 54 publications

(26 citation statements)

References 38 publications

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“…Studies on the removal of nitrate from aqueous solutions by different methods have been reported in a number of publications. These include ion exchange [8], electrolysis [9], biological denitrification [10], reverse osmosis [11], and adsorption [12]. Physicochemical treatment processes such as ion exchange, reverse osmosis, and electrodialysis require high maintenance and operation costs; they also produce sludge, which is difficult to handle [13].…”

Section: Introductionmentioning

confidence: 99%

Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Golestanifar

Asadi

Alinezhad

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThe use of nanoalumina and iron-modified pumice (IMP) as adsorbents for removal of nitrate from aqueous solution was investigated. Adsorption experiments were carried out as a function of the pH, contact time, and concentration of nitrate. Both adsorbents were effective for the nitrate removal in a pH range of 4-6, and optimum removal of nitrate ions occurred in a pH 5.0. The adsorption of nitrate on both adsorbents reached equilibrium within 50 min. Nitrate sorption kinetics was well fitted by pseudo-second-order model. The maximum nitrate uptake capacities for nanoalumina and IMP were found to be 70.8 and 86.7 mg g −1 , respectively. The kinetic results showed that the nitrate sorption to nanoalumina and IMP followed pseudo-second-order kinetics with a correlation coefficient greater than 0.99. The equilibrium data for both the adsorbents for nitrate removal were fitted to Langmuir and Freundlich isotherms, but the experimental data were found to be little better fitted by the Langmuir model. These results indicate that nanoalumina and IMP are interesting alternatives for nitrate removal from the aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Golestanifar

Asadi

Alinezhad

et al. 2015

Desalination and Water Treatment

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“…Overtime the researchers have developed these electrodes by developing the used active membranes, and finding new conditions for each one in order to increase the life of the electrode and improve its response (Tanga, 2012;Harshala, 2013;Jin-Hee, 2013;Bosko, 2014) And one of the former researches is a study we did, that found alternative, analytical conditions and a technique to keep the selective electrode on, due to the absence of operating conditions and the anonymous attached solutions from the origin company, it turned out through the analytical technical conditions that the addition of 0.5 ml of Ammonium sulphate electrolyte with concentration 3 mol/l as a solution to adjust the Ionic strength gave the best response, Nernst slope, response time 20 sec and those values remained steady for 15 sec. By studying PH domain It turned out that the electrode works within domain (2-8) PH and the best response was PH=5.5 with the existence of 1ml of Buffer solution (Acetic Acid -sodium acetate).…”

Section: Introductionmentioning

confidence: 99%

Determination of Nitrates in samples using Ion Selective Electrode with its new conditions

Nasser¹,

Aladdin²,

Nasser³

2018

JCHPS

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New electric method depends on using new conditions for Nitrates selective electrode (PH=5.5, electrolyte Ammonium sulphate 3mol/l, Buffer Acetic acid -Sodium acetate, temperature 25 0 C) was applied for determination Nitrates concentration in different environmental samples (water-soil-vegetables). The study showed that this method has good sensitivity and it's accurate and reliable by finding SD, RSD, CL. By comparison between Nitrates concentration in studied samples, it was found that they are within permissible limits according to world health organization Reports.

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“…In theory, the main components of total nitrogen in wastewater treated by anoxic-aerobic biological treatment process, is mainly nitrate nitrogen, then there is little utilizing organic compounds remained in it, therefore, many kinds of physical-chemical ways are carried out to treat it effectively, such as Fe-Mg reduction [7,8], Ion exchange, Reverse Osmosis and Electrolysis [9,10], but all these physical-chemical ways also have some disadvantages on engineering application, such as high cost, secondary pollution and complicated operation control. Then, some innovated biological ways, such as deep-bed filters and etc., are continuously investigated to be used for deep nitrogen removal that is much more preferred than physical-chemical ways for some advantages, such as low operating cost and no secondary pollution [11].…”

Section: Introductionmentioning

confidence: 99%

Effects of C/N Ratio on Nitrate Removal from PU Synthetic Leather Wastewater Treated by Anoxic Moving Bed Bio-film Reactors

Ding¹,

Wang²,

Zhou³

et al. 2017

JRST

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One sample of PU synthetic wastewater was analyzed, its Total Nitrogen (TN) was mainly composed of about 300 mg/L nitrate, and three pieces of anoxic Moving Bed Bio-film Reactors (MBBR) were applied to treat it, one MBBR was run with raw wastewater, the second and third were with synthetic wastewater, and the results were as followings: TN could be removed off completely under the condition of relative low C/N ratio; the C/N ratio of removed pollutants was liner correlation with C/N ratio of influent, but the C/N ratio of effluent was increase violently, the above results demonstrated that, the external carbon source, necessary to the heterotrophic bacteria, was consumed more rapidly than nitrate nitrogen in initial denitrifying stage, then the nitrogen was utilized much more rapidly at later stage, and the ratio of C/N denitrification behaved as a chamfer linear.

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Nitrate reduction of brines from water desalination plants by membrane electrolysis

Cited by 54 publications

References 38 publications

Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Determination of Nitrates in samples using Ion Selective Electrode with its new conditions

Effects of C/N Ratio on Nitrate Removal from PU Synthetic Leather Wastewater Treated by Anoxic Moving Bed Bio-film Reactors

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