Adsorption of nitrate onto anionic bio-graphene nanosheet from aqueous solutions: Isotherm and kinetic study

Ghadiri, Seid Kamal; Nasseri, Simin; Nabizadeh, Ramin; Khoobi, Mehdi; Nazmara, Shahrokh; Mahvi, Amir Hossein

doi:10.1016/j.molliq.2017.06.122

Cited by 55 publications

(26 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar finding was reported by Yousefi et al They showed the highest fluoride exposure for different regions was observed in children and teenager's groups [34]. Therefore, it is imperative to reduce nitrate concentration in groundwater using new and effective methods [35][36][37] to avoid the potential risk to the population.…”

Section: Risk Characterizationsupporting

confidence: 82%

A lumped-parameter model for investigation of nitrate concentration in drinking water in arid and semi-arid climates and health risk assessment

Karyab

Hajimirmohammad-Ali

Bahojb

2019

J Environ Health Sci Engineer

View full text Add to dashboard Cite

Purpose This study was conducted to assess the capability of the lumped parameter model (LPM), an efficient model due to its analytical nature and the limited data requirements, to estimate health risks from nitrate in groundwater in arid and semi-arid climates. Methods To assess the capability of LPM, two scenarios were established: one for estimation of hazard quotient (HQ) via monitoring nitrate concentration in groundwater and the other using the LPM. After nitrate was monitored in 148 randomlyselected wells, a modified LPM was used to estimate water volume and nitrate concentration, which ultimately led to the development of a model for estimating HQ. The performances of LPM were assessed using the coefficient of determination, percentage standard deviation, and root mean square error. To compare health risk maps Kriging, Spline, Inverse distance weighted, and natural neighbor models were run using geographical information system (GIS). Results Linear analysis revealed a strong correlation between HQ values estimated in LPM and monitoring scenarios in arid climate compared to semi-arid (r = 0.962, n = 22, p = 0.00), suggesting that the LPM was more accurate in predicting nitrate concentration in the arid climate. Uncertainty analysis showed that LPM outputs were sensitive to several parameters, especially leakage from cesspits, which are involved in the sources and sinks of nitrate in the groundwater. In addition, it was found that the natural neighbor was the most appropriate model with the lowest errors for preparing health risk maps from nitrate. Conclusions The obtained results revealed that LPM can be effectively used to estimate nitrate concentration in groundwater in arid climates and thereby LPM is an appropriate model to estimate health risk from nitrate in this climate.

show abstract

Section: Risk Characterizationsupporting

confidence: 82%

A lumped-parameter model for investigation of nitrate concentration in drinking water in arid and semi-arid climates and health risk assessment

Karyab

Hajimirmohammad-Ali

Bahojb

2019

J Environ Health Sci Engineer

View full text Add to dashboard Cite

show abstract

“…Batch kinetic studies indicated that the pseudo-second-order equation for the adsorption kinetic curve of nitrite and nitrate ions is a good fit. Moreover, the solution pH had no significant effect on the nitrite and nitrate ion adsorption within the experimental pH range (4)(5)(6)(7)(8)(9)(10)(11)(12). Collectively, the results suggest that Fe-HT could be useful for the removal of nitrite and nitrate ions from aqueous solution.…”

Section: Resultsmentioning

confidence: 82%

Adsorption of Nitrite and Nitrate Ions from an Aqueous Solution by Fe–Mg-Type Hydrotalcites at Different Molar Ratios

Ogata

Nagai

Kariya

et al. 2018

CHEMICAL & PHARMACEUTICAL BULLETIN

View full text Add to dashboard Cite

In this study, we prepared Fe-Mg-type hydrotalcites (Fe-HT3.0 and Fe-HT5.0) with different molar ratios and evaluated their adsorption capability for nitrite and nitrate ions from aqueous solution. Fe-HT is a typical hydrotalcite-like layered double hydroxide. Adsorption isotherms, as well as the effects of contact time and pH were investigated, and it was found that Fe-HT can adsorb larger amounts of nitrite and nitrate ions than Al-HT (normal-type hydrotalcite). Adsorption isotherm data were fitted to both Freundlich (correlation coefficient: 0.970-1.000) and Langmuir (correlation coefficient: 0.974-0.999) equations. Elemental analysis and binding energy of Fe-HT surface before and after adsorption indicated that the adsorption mechanism was related to the interaction between the adsorbent surface and anions. In addition, the ion exchange process is related to the adsorption mechanism. The adsorption amount increased with increasing temperature (7-25°C). The experimental data fit the pseudo-second-order model better than the pseudo-first-order model. The effect of pH on adsorption was not significant, which suggested that Fe-HT could be used over a wide pH range (4-12). These results indicate that Fe-HT is a good adsorbent for the removal of nitrite and nitrate ions from aqueous solution.

show abstract

“…oxygen, hydrogen or metals ions), molecules (e.g. epoxy, hydroxyl, carbonyl, carboxylic groups, or chelates) and magnetic nanoparticles, what continuously increased the popularity for proposing the ability of graphene-based systems to purify water from nitrates contamination by the separation or adsorption methods (Ghadiri et al, 2017;Ma et al, 2018;Jilani et al, 2018). Magnetic nanoparticles (most often of magnetite -Fe3O4) size in the range from 1-100 nm provide high surface energy and reactivity, what is the major cause of their different physical properties compared to macroscopic systems with the same chemical composition.…”

Section: Possibilities and New Approaches Of Nitrates Decontaminationmentioning

confidence: 99%

Relationship of nitrates and nitrites in the water environment with humans and their activity

Balejčíková¹,

Tall²,

Kandra³

et al. 2020

ahs

View full text Add to dashboard Cite

Nitrates and nitrites in water pose a health and environmental hazards, in particular when exceeding limits defined in the European Union, i.e. max. 50 mg l-1 of nitrates. It is not recommended to exceed the limit of 10 mg l-1 of nitrates for infants and children. The maximum concentration of nitrites is 0.5 mg l-1 for adults and infants less than 0.1 mg l-1. Our work offers a review of the water quality concerning the relationship between nitrates/nitrites and humans. Basic properties and forms of nitrates, their use for human activities, importance and risks to human health and possibilities of their physicochemical determination are summarized. Our study demonstrates also the novel approaches to the nitrates decontamination in a water environment using various nanomaterials. We aimed at a collection of records from the monitoring of nitrates in selected areas in Slovakia to show good quality of water in various water sources, which over time improves due to the increasingly low fertilization intensity and thus of agriculture production, which is gradually being replaced by imports.

show abstract

Adsorption of nitrate onto anionic bio-graphene nanosheet from aqueous solutions: Isotherm and kinetic study

Cited by 55 publications

References 37 publications

A lumped-parameter model for investigation of nitrate concentration in drinking water in arid and semi-arid climates and health risk assessment

A lumped-parameter model for investigation of nitrate concentration in drinking water in arid and semi-arid climates and health risk assessment

Adsorption of Nitrite and Nitrate Ions from an Aqueous Solution by Fe–Mg-Type Hydrotalcites at Different Molar Ratios

Relationship of nitrates and nitrites in the water environment with humans and their activity

Contact Info

Product

Resources

About