Development of magnesium–iron layered double hydroxide and application to nitrate removal

Kamimoto, Yuki; Okamoto, Naoki; Hagio, Takeshi; Jung, Yong-Jun; Deevanhxay, Phengxay; Ichino, Ryoichi

doi:10.1007/s42452-019-1240-7

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Meanwhile, other studies indicate that LDH is dissolved if the pH is stabilized by the addition of acid or base during the adsorption experiment (Hongo et al, 2008;Luengo et al, 2017;Zhou et al, 2011). And the phosphate adsorption efficacy with competitive anions were reported by Kamimoto et al, phosphate ions have higher affinity to MgFe-LDH compare nitrate (NO3 -), chloride (Cl -) and sulfate (SO4 -) (Kamimoto et al, 2019). Also, Drenkova-Tuhtan et al, reported MgFe-LDH@magnetic particles shows similar phosphate adsorption efficacy compare to carbonate ions (CO3 2-) (Drenkova-Tuhtan et al, 2013).…”

Section: Introductionmentioning

confidence: 84%

An investigation of the phosphate removal mechanism by MgFe layered double hydroxides

Kim

Lundehøj

Nielsen

2020

Applied Clay Science

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Section: Introductionmentioning

confidence: 84%

An investigation of the phosphate removal mechanism by MgFe layered double hydroxides

Kim

Lundehøj

Nielsen

2020

Applied Clay Science

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“…Thus, the adopted model for the next assays was as follows. ORP = a + b pH + c log 10 NO − 3 (6) This adopted model refers to using a synthetic medium; however, in real effluents, the conditions are more complex and stressful for bacteria. Nevertheless, this proposed model can be applied in real effluents where electroactive species exchange electrons in an equilibrium state.…”

Section: Modeling and Monitoring Using Orpmentioning

confidence: 99%

“…On the one hand, physicochemical methods such as sedimentation and membrane separation [5] have been shown to be ineffective in completely removing nitrates [6]. On the other hand, electrocoagulation [7], heterogeneous catalysis, electrochemical [8] and bioelectrochemical [9] methods were sufficiently efficient at laboratory scales.…”

Section: Introductionmentioning

confidence: 99%

Applying the Nernst Equation to Control ORP in Denitrification Process for Uranium-Containing Nuclear Effluent with High Loads of Nitrogen and COD

Venturini

Rossen

Bucci

et al. 2022

Water

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Several reviews of denitrification have shown it to be an efficient process for treating high nitrate-loaded effluents from nuclear industries. However, stressful conditions adversely affect biological kinetic parameters and performance. Additionally, actual nuclear effluents contain multiple pollutants and radioactive emissions that could render implementation difficult. The objective of this study was to treat and recycle water from nuclear industries by using a mixture of blended real nuclear wastewater (BRNW). The process was carried out under physicochemical parameters control in a biological model to established a technical setup and to model the denitrification process in a real nuclear wastewater effluent. Denitrification processes were carried out in the wastewater sample under controlled ORP conditions by the Hill model to establish the kinetic model. The results show a complete elimination of nitrate by the bacteria. Indicators of biochemical reactions were used to obtain a model based on Monod and controlled ORP. The good fit of the proposed model was verified under empirical and simulated conditions. To establish optimal performance, it was necessary to add 3% v/v of methanol, as a carbon source, to remove the nitrate in BRNW. Isolation techniques confirmed that Pseudomonas spp. was the dominant bacteria. Gene expression demonstrated the lack of inhibition of the NosZ gene responsible for the reduction in nitric oxide, a “greenhouse gas”. Finally, COD and uranium were removed from the liquid by precipitation. At the end of the process, the treated effluent could potentially be reused in industrial processes, recycling most of the wastewater effluents.

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“…Ronghua Li et al [27] developed Mg/Al-layered double hydroxide at different mole ratios and revealed improved phosphate adsorption with increasing Mg/Al ratio in the Mg/Al-LDHs biochar composites capacity. Yuki Kamimoto et al [28] concluded excellent adsorption performance of nitrate onto magnetic calcined Mg-Fe LDH. Muayad Al Jaberi et al [29] prepared CaFe-layered double hydroxide by co-simple co-precipitation technique and reported a maximum removal capacity of 130 mg/g.…”

Section: Introductionmentioning

confidence: 99%

Comparative Adsorptive Removal of Phosphate and Nitrate from Wastewater Using Biochar-MgAl LDH Nanocomposites: Coexisting Anions Effect and Mechanistic Studies

et al. 2020

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In this study, date-palm biochar MgAl-augmented double-layered hydroxide (biochar–MgAl–LDH) nanocomposite was synthesized, characterized, and used for enhancing the removal of phosphate and nitrate pollutants from wastewater. The biochar–MgAl–LDH had higher selectivity and adsorption affinity towards phosphate compared to nitrate. The adsorption kinetics of both anions were better explained by the pseudo-first-order model with a faster removal rate to attain equilibrium in a shorter time, especially at lower initial phosphate-nitrate concentration. The maximum monolayer adsorption capacities of phosphate and nitrate by the non-linear Langmuir model were 177.97 mg/g and 28.06 mg/g, respectively. The coexistence of anions (Cl−, SO42−, NO3−, CO32− and HCO3−) negligibly affected the removal of phosphate due to its stronger bond on the nano-composites, while the presence of Cl− and PO43− reduced the nitrate removal attributed to the ions’ participation in the active adsorption sites on the surface of biochar–MgAl–LDH. The excellent adsorptive performance is the main synergetic influence of the MgAl–LDH incorporation into the biochar. The regeneration tests confirmed that the biochar–MgAl composite can be restored effortlessly and has the prospective to be reused after several subsequent adsorption-desorption cycles. The biochar-LDH further demonstrated capabilities for higher removal of phosphate and nitrate from real wastewater.

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Development of magnesium–iron layered double hydroxide and application to nitrate removal

Cited by 11 publications

References 20 publications

An investigation of the phosphate removal mechanism by MgFe layered double hydroxides

An investigation of the phosphate removal mechanism by MgFe layered double hydroxides

Applying the Nernst Equation to Control ORP in Denitrification Process for Uranium-Containing Nuclear Effluent with High Loads of Nitrogen and COD

Comparative Adsorptive Removal of Phosphate and Nitrate from Wastewater Using Biochar-MgAl LDH Nanocomposites: Coexisting Anions Effect and Mechanistic Studies

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