Multi-objective optimization of permeable reactive barrier design for Cr(VI) removal from groundwater

Maamoun, Ibrahim; Eljamal, Osama; Falyouna, Omar; Eljamal, Ramadan; Sugihara, Yuji

doi:10.1016/j.ecoenv.2020.110773

Cited by 76 publications

(27 citation statements)

References 56 publications

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“…The value of the barrier width (w) was estimated as a function of the relative hydraulic conductivity between barrier material and aquifer medium (K r / K aq ) considering the following formula [6]:…”

Section: Optimization Modelmentioning

confidence: 99%

“…human health severely by causing lethal diseases the brain and the nervous system [5]. Accordingly, the World Health Organization (WHO) set the maximum permissible concentration of Cr in drinking water to be 50 μg/L [6]. Hence, developing an efficient remediation technology for groundwater from Cr(VI) contamination is crucial to meet the permissible limits.…”

Section: Introductionmentioning

confidence: 99%

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Optimization Modeling of nFe0/Cu-PRB Design for Cr(VI) Removal from Groundwater

Maamoun

Falyouna

Eljamal

et al. 2021

IJESD

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Hexavalent chromium is one of the highly toxic heavy metals which could lead to severe health issues when it is discharged into aquifers as industrial wastewater. In the current study nFe0/Cu was successfully employed in PRB technology for Cr(VI) removal from groundwater. Batch and column experiments confirmed the high reactive performance of nFe0/Cu towards Cr(VI) removal by around 85% removal efficiency. The main pathways for Cr-species removal by nFe0/Cu were determined as the reduction of Cr(VI) to Cr(III) by both nFe0 and Cu0 and the precipitation/co-precipitation of Cr(III) with the released iron oxides on the nFe0/Cu surface. The developed 3D-surface response optimization model confirmed the reciprocal relation between the residence time, barrier thickness and hydraulic conductivity. The interaction and sensitivity analysis between the model’s parameters were significantly crucial for defining the optimal design conditions of the nFe0/Cu-PRB. Generally, the current study could represent a great contribution in scaling-up the PRB technology towards the real field applications.

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Section: Optimization Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization Modeling of nFe0/Cu-PRB Design for Cr(VI) Removal from Groundwater

Maamoun

Falyouna

Eljamal

et al. 2021

IJESD

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“…Nanoscale zero-valent iron (Fe 0 ) has great advantages in the removal of most of the soluble contaminants in aqueous solutions [57][58][59]. Combining the unique features of Fe 0 , such as the core shell structure and the high redox potential, with the special characteristics of GS-RMA could yield a novel composite with extraordinary remediation abilities [60][61][62]. Supporting the nanoparticles on the microalgal surface will provide various removal pathways for different contaminants via either the reactive surface of Fe 0 or the organic functional groups of GS [63][64][65][66][67].…”

Section: Bio-substrate For Nanoparticlesmentioning

confidence: 99%

Innovative Biotechnological Applications of Galdieria Sulphuraria-Red Microalgae (GS-RMA) in Water Treatment Systems

Maamoun¹,

Bensaida²,

Eljamal³

et al. 2020

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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In this study, mini review is introduced on the features of the red microalgae (RMA) and its biotechnological potential in different applications. Since it has unique extremophilic features, Galdieria Sulphuraria (GS) is considered to be a perfect microorganism candidate for various biotechnological applications in water treatment systems. Special interest has been oriented towards the applications of GS in water treatment systems, such as nutrients, biological oxygen demand (BOD) and heavy metals (HMs) removal from wastewater. Also, different future prospects have been suggested in terms of the new and innovative applications of GS in water treatment based on the gaps in the literature, including phycoremediation of HMs, bio-resin production, bio-substrate for nanoparticles, and pharmaceuticals removal from wastewater. Finally, the challenges and limitations of employing GS in biotechnological applications have been reviewed, which revealed that using GS has a great potential in largescale outdoor cultivation without becoming contaminated with other microorganisms.

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“…This study suggested that the removal significantly depends on temperature, dosage, initial concentration, and pH. Moreover, the statistical factorial experimental design was an effective method applied by various researchers in several scientific studies to optimize the heavy metal removal from polluted water using different types of adsorbents (Seki et al 2006;Geyikçi and Büyükgüngör 2013;Rêgo et al 2013;Dong and Sartaj 2016;Ghaedi et al 2018;Jaria et al 2019;Perez Mora et al 2019;Maamoun et al 2020;Rahman et al 2020a, b). Moreover, response surface methodology was applied to optimize the removal condition and mechanism of Cr(Ⅵ) by Na2SO3/CaO (Zhao et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Strontium Removal Process From Contaminated Water Using Zeolite Nanocomposites

Karmaker

Eljamal

Saha

2021

Preprint

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The effective removal of strontium from polluted water is an emerging issue worldwide, especially in Japan, after the destruction of Fukushima’s Daiichi Nuclear Power Plant. In the strontium removal process, statistical optimization of associated factors is needed to reduce the quantity of chemicals and the number of experimental trials. In this study, response surface methodology based on the central composite design was employed for assessing the influence of different factors and their interaction effects on the efficiency of strontium removal. We have considered nanoscale zero-valent iron-zeolite (nZVI-Z) and nano-Fe/Cu zeolite (nFe/Cu-Z) as adsorbents for the effective removal of strontium. The present study showed that the most statistically significant potential contributor was initial concentration, followed by contact time in the removal process. The study indicated that the interaction effect between contact time and initial concentration was statistically important, suggesting the need for a multi-mechanism technique in the removal phase of strontium. Tόth, Langmuir, Dubinin-Astakhov (D-A), Freundlich, and Hill isotherm models were also fitted with the experimental strontium adsorption data, in which the Tόth model fitted best compared to the other models based on the RMSD.

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Multi-objective optimization of permeable reactive barrier design for Cr(VI) removal from groundwater

Cited by 76 publications

References 56 publications

Optimization Modeling of nFe0/Cu-PRB Design for Cr(VI) Removal from Groundwater

Optimization Modeling of nFe0/Cu-PRB Design for Cr(VI) Removal from Groundwater

Innovative Biotechnological Applications of Galdieria Sulphuraria-Red Microalgae (GS-RMA) in Water Treatment Systems

Optimization of Strontium Removal Process From Contaminated Water Using Zeolite Nanocomposites

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