Innovating new methods for wastewater treatment in El-Dakhla Oasis in Upper Egypt from chemical and biological pollutants using modified Down Flow Hanging Sponge (DHS) reactor in presence of new environmental friendly chelator

Tabl, Abdou S. El; Zawam, Sameh; Sarhan, Karem Shawky

doi:10.21608/ejchem.2021.45960.2938

Cited by 4 publications

(5 citation statements)

References 10 publications

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“…This work confirms the high importance of organic molecules due to their various applications as reported before. [22][23][24][25][26][27]…”

Section: Discussionmentioning

confidence: 99%

Development and validation of a green RP-HPLC method for detection and quantitation of meropenem trihydrate in the bulk: A comparison with HPTLC method

Bashimam,

El-Zein

2024

10.5267/j.ccl

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This research introduces an eco-friendly green Reverse-Phase High Performance Liquid Chromatography (RP-HPLC) method for detecting and quantifying meropenem trihydrate. Traditional methods use buffered solutions, gradient mobile phases, and longer retention times, but this method offers a rapid RP-HPLC technique with a C8 column and isocratic mobile phase (60% methanol, 40% ultra-pure water), eliminating the need for buffers and acetonitrile. It features a short 2.1-minute retention time and a high r² value of 0.9995. It delivers accuracy (101.1-102.3%) and precision (RSD ≤ 2%), coupled with low LOD and LOQ values of 1.72 and 5.20 µg/ml. Aqueous dilution simplifies sample preparation, reducing degradation and interference. The method is compared with an HPTLC method, showing an extended linear range (6.25-200 µg/ml for HPLC, 7.81-62.5 µg/ml for TLC) and high sensitivity, making it significant for meropenem trihydrate quality control in bulk and dosage forms.

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“…This work confirms the high importance of organic molecules due to their various applications as reported before. [22][23][24][25][26][27]…”

Section: Discussionmentioning

confidence: 99%

Development and validation of a green RP-HPLC method for detection and quantitation of meropenem trihydrate in the bulk: A comparison with HPTLC method

Bashimam,

El-Zein

2024

10.5267/j.ccl

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“…The high TDS, TSS, chlorides, turbidity and DOC recorded in the wastewater could be sourced from the presence of organic and inorganic solids [ 3 ]. These solids are either suspended or dissolved [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

“…This could explain the further DO improvement in the vermifiltrates after the macrophyte chamber. The high TDS, TSS, chlorides, turbidity and DOC recorded in the wastewater could be sourced from the presence of organic and inorganic solids [3]. These solids are either suspended or dissolved [34].…”

Section: Plos Onementioning

confidence: 99%

“…These wastewater are poorly treated and infiltrate the sub-surface to contaminate the groundwater table, contributing to freshwater depletion [ 2 ]. Contaminants in the wastewater such as organic and inorganic solids, nutrients as well as pathogens, have been reported to cause serious health effects [ 3 ]. The contaminants remain either in soluble, colloidal or suspended form.…”

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of developed macrophyte-assisted vermifiltration system designed with varied macrophytes and earthworm species for domestic wastewater treatment

Nsiah-Gyambibi

Acheampong²,

Von-Kiti³

et al. 2023

PLoS ONE

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Development of sustainable technology to treat domestic wastewater with added advantages of cost reduction and improved handling efficiency is crucial in developing countries. This is because, domestic wastewater from households are stored in septic tanks and are poorly treated prior discharge. This study developed a macrophyte-assisted vermifiltration (MAV) system to treat domestic wastewater. The MAV system is an integrated approach of macrophytes and earthworms in a vermifiltration and complex physicochemical mechanism processes. The use of different macrophyte and earthworm species was hypothesized by the study to affect and vary the treatment performance of the developed MAV. The study therefore aimed to evaluate the treatment performance of the developed MAV when three varied macrophyte species (Eichhornia crassopes, Pistia stratiotes and Spirodela sp.) and two varied earthworm species (Eisenia fetida and Eudrilus eugeniae) were used to design the treatment system. Treated effluents were collected every 48hours within two weeks for physico-chemical, pathogen and helminth analysis. The contaminants (Ntot, NH3, NO3-N and Ptot) in the wastewater were high (>50 mgL-1, >5 mgL-1, >1 mgL-1 and >20 mgL-1 respectively). Results revealed that the developed MAV systems were effective in the removal of solids (>60%), nutrients (>60%) and pathogens (>90%). In most cases, there were no significant differences between the selected varied macrophytes and earthworms in the treatment performances. Results therefore demonstrated that the selected macrophytes combined with the earthworm species were suitable when used in the development of the MAV system. Developing the MAV with the selected varied macrophyte and earthworm species did not only contribute to the treatment of the wastewater, but also improved the vermiculture. Eudrilus eugeniae however demonstrated higher biomass gain (5–10% more) compared to Eisenia fetida.

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“…This work confirms the high importance of organic molecules in different applications and there are a lot of published papers confirms this point. [50][51][52][53][54][55][56]…”

Section: Uv-visible Spectra Of the Methylene Blue And Methylene Redmentioning

confidence: 99%

Predictive study, using density functional theory and time dependent functional theory, on the structure-property quantification of methylene blue and methyl red dyes for the application in organic solar cells

Amini,

Karni,

Oubenali

et al. 2024

10.5267/j.ccl

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In this work, two organic materials as dyes, namely, methylene blue (MB) and methyl red (MR), have been proposed to play the role of the electron donor in organic photovoltaic (OPV) cells. We use the PCBM as a well-known electron acceptor. The density functional theory (DFT) method has been used to determine the electrostatic potential and the frontier molecular orbitals (FMO), of the methylene blue (MB) and the methyl red (MR) compounds. Nonlinear optical (NLO) descriptors have been determined for the two compounds. The potential energy surface analysis has been performed by the DFT method using the exchange and correlation of Becke, Lee, Yang, and Parr Gradient Corrected Functional (B3LYP) with the standard 6-31G(d) base. We have performed another theoretical study using quantum time-dependent density functional theory (TD-DFT) on both MB and MR as organic dyes to determine their UV-Vis spectra. The results of the energy gap, chemical hardness, dipole moment, and hyperpolarizability show that MB may be chemically more reactive Than MR. The present work has proposed a bilayer organic photovoltaic (OPV) cell to contribute to the valorization of the two dyes as solar materials. The developed photovoltaic cell project has used electrical and energetic parameters that can describe the OPV cell based on ([MB or MR]: PCBM). Open-circuit voltage (Voc), excitation energy, and oscillator strength have been theoretically determined. The results of the present work showed a remarkably high open circuit voltage, especially in the case of methyl red (1.55 V) more than in the case of the methylene blue (0.84 V) so that both of the two dyes can be a good candidate for organic solar cells.

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Innovating new methods for wastewater treatment in El-Dakhla Oasis in Upper Egypt from chemical and biological pollutants using modified Down Flow Hanging Sponge (DHS) reactor in presence of new environmental friendly chelator

Cited by 4 publications

References 10 publications

Development and validation of a green RP-HPLC method for detection and quantitation of meropenem trihydrate in the bulk: A comparison with HPTLC method

Development and validation of a green RP-HPLC method for detection and quantitation of meropenem trihydrate in the bulk: A comparison with HPTLC method

Performance evaluation of developed macrophyte-assisted vermifiltration system designed with varied macrophytes and earthworm species for domestic wastewater treatment

Predictive study, using density functional theory and time dependent functional theory, on the structure-property quantification of methylene blue and methyl red dyes for the application in organic solar cells

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