Nitrate reduction by nano-Fe/Cu particles in packed column

Hosseini, Seiyed Mossa; Ataie-Ashtiani, Behzad; Kholghi, Majid

doi:10.1016/j.desal.2011.03.051

Cited by 152 publications

(75 citation statements)

References 34 publications

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“…However, certain amount of N 2 gas was observed when nitrate was reduced by nZVI with Pd and Cu deposits (Hosseini et al, 2011;Liou et al, 2009). Production of N 2 gas was adduced to the presence of the deposited metals on nZVI (Hosseini et al, 2011;Liou et al, 2009). N 2 O, a common product of nitrate reduction (Hansen et al, 1994;Fanning, 2000), may have also been produced in our experiments.…”

Section: Effect Of Cd(ii) On Gaseous Products Of Nitrate Reductionmentioning

confidence: 99%

“…However, nitrite accumulation is undesirable in natural environment as nitrite is highly toxic to several organisms, including humans (Hoque et al, 2008;Tenuta and Lazarovits, 2004;Bruning-Fann and Kaneene, 1993). Several previous studies have shown that catalysts, such as Cu (Hosseini and Tosco, 2013;Hosseini et al, 2011;Liou et al, 2009), Ag (Singh et al, 2012), or Au (Liou et al, 2009), can facilitate nitrite reduction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous removal of cadmium and nitrate in aqueous media by nanoscale zerovalent iron (nZVI) and Au doped nZVI particles

et al. 2014

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a b s t r a c tNanoscale zerovalent iron (nZVI) has demonstrated high efficacy for treating nitrate or cadmium (Cd) contamination, but its efficiency for simultaneous removal of nitrate and Cd has not been investigated. This study evaluated the reactivity of nZVI to the cocontaminants and by-product formation, employed different catalysts to reduce nitrite yield from nitrate, and examined the transformation of nZVI after reaction. Nitrate reduction resulted in high solution pH, negatively charged surface of nZVI, formation of Fe 3 O 4 (a stable transformation of nZVI), and no release of ionic iron. Increased pH and negative charge contributed to significant increase in Cd(II) removal capacity (from 40 mg/g to 188 mg/g) with nitrate present. In addition, nitrate reduction by nZVI could be catalyzed by Cd(II): while 30% of nitrate was reduced by nZVI within 2 h in the absence of Cd(II), complete nitrate reduction was observed in the presence of 40 mg-Cd/L due to the formation of Cd islands (Cd(0) and CdO) on the nZVI particles. While nitrate was reduced mostly to ammonium when Cd(II) was not present or at Cd(II) concentrations ! 40 mg/L, up to 20% of the initial nitrate was reduced to nitrite at Cd(II) concentrations < 40 mg/L. Among nZVI particles doped with 1 wt. % Cu, Ag, or Au, nZVI deposited with 1 wt. % Au reduced nitrite yield to less than 3% of the initial nitrate, while maintaining a high Cd(II) removal capacity.© 2014 Elsevier Ltd. All rights reserved. Available online at www.sciencedirect.com ScienceDirect journal homepage: www.else vier.com/locate /wa tres w a t e r r e s e a r c h 6 3 ( 2 0 1 4 ) 1 0 2 e1 1 1http://dx

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Section: Effect Of Cd(ii) On Gaseous Products Of Nitrate Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of cadmium and nitrate in aqueous media by nanoscale zerovalent iron (nZVI) and Au doped nZVI particles

et al. 2014

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“…The study used laboratory porous column apparatus or packed column remediation apparatus as shown in Figure 1. This column with porous media was developed or modified based on the column used in previous study by Hosseini's column [20].…”

Section: Methodsmentioning

confidence: 99%

Remediation of leachate by composite NZVI-activated carbon in packed column

Yusmartini

Faizal

2017

MATEC Web Conf.

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Abstract. Improper solid waste management at final disposal site can cause in environtmental problem. The surrounding water bodies could be affected by leachate from the solid waste decomposition process because leachate contains high concentration of BOD 5 , COD, ammonia, hydrocarbon suspended solid, and heavy metals. This problem has affected a final disposal site (named Sukawinatan) in Palembang, Indonesia, which did not implement leachate management system. This paper propose a method to reduce BOD 5 , COD, Ammonia concentrations of the leachate in by applying composite nano zero valent iron (NZVI) -activated carbon for the remediation system of the surrounding area of Sukawinatan final disposal. The performance of the method was evaluated in this study using laboratory porous column apparatus. The results showed that the composite NZVI-activated carbon can be used to reduce concentration of pollutants from water bodies. The removal efficiency of this method on BOD 5 , COD and ammonia are 94.81 %, 92.81 % dan 95.58 % respectively.

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“…On the other hand, the reduction of nitrate using metal ions is a promising method for denitrification of water and many studies have been conducted with the aim to develop new selective materials for the reduction of nitrate to nitrogen [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Despite the good results achieved, the use of noble metal-based solids such as Pd and Pt as well as the addition of hydrogen in the reaction medium limit its application in large scale due to the high costs involved [2,18].…”

Section: Introductionmentioning

confidence: 99%