Wastewater Treatment: Current and Future Techniques

Mojiri, Amin; Bashir, Mohammed J.K.

doi:10.3390/w14030448

Cited by 26 publications

(12 citation statements)

References 21 publications

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“…To encourage the reuse of wastewater, it is essential to find a treatment method that is ecological, reliable, and cost-effective. Over time, different physicochemical (e.g., adsorption, advanced oxidation processes, coagulation, flocculation) [7], biological (e.g., oxida-tion ditch process, activated sludge process, sequencing batch reactor, phytoremediation technology) [8,9] and hybrid treatment systems have been developed to mitigate the threat of pollution and reduce wastewater discharges [10,11]. The choice of a wastewater treatment method depends on the type of pollutant.…”

Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Modification of a Walnut Shell Biosorbent for Increased Efficiency in Wastewater Treatment

Enache¹,

Samoilă²,

Cojocaru³

et al. 2023

Sustainability

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Herein, we report the performance of some low-cost biosorbents developed by environment-friendly modification of walnut shells. Two types of biosorbents were prepared by ecological modification of walnut shell surfaces: (1) biosorbents obtained by hot water treatment (WSH2O) and (2) biosorbents produced by mercerization (WSNaOH). Different techniques were used to evaluate the morphological, elemental, and structural modification of the biosorbents, by comparison with raw materials. These characterization techniques involved scanning electron microscopy (SEM) coupled with energy-dispersive X-ray analysis, and Fourier-transform infrared spectroscopy (FTIR). The biosorbents were employed for the removal of methylene blue (MB) and crystal violet (CV) cationic dyes (as model organic pollutants) from aqueous solutions. The kinetic adsorption data mainly followed the pseudo-first-order model. The maximum adsorption capacities of the produced biosorbents ranged from 102 to 110 mg/g and were observed at 330 K. Equilibrium data for adsorption were fitted to Langmuir and Freundlich isotherm models. The calculated values of thermodynamic parameters suggested that the investigated adsorption processes were exergonic (ΔG < 0) and exothermic (ΔH < 0). In addition, a possible valorization of the cost-effective and eco-friendly spent biosorbents was tested by performing secondary adsorption of the anionic dyes.

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Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Modification of a Walnut Shell Biosorbent for Increased Efficiency in Wastewater Treatment

Enache¹,

Samoilă²,

Cojocaru³

et al. 2023

Sustainability

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“…Water pollution is considered one of the most important critical problems facing countries, since wastewater poses a significant threat to the ecosystem as well as human health 1 . One source of contamination is dye discharge from industries such as textile, paper, leather tanning, food processing, plastics, cosmetics, rubber, printing and dye manufacturing 2 – 4 . Methylene blue (MB) is a highly stable cationic dye which readily aggregates and highly soluble even at minimal concentrations causing harmful impacts 5 – 8 .…”

Section: Introductionmentioning

confidence: 99%

Sulfonated graphene oxide impregnated cellulose acetate floated beads for adsorption of methylene blue dye: optimization using response surface methodology

Basha

El-Monaem

Khalifa

et al. 2022

Sci Rep

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New multi-featured adsorbent beads were fabricated through impregnation of sulfonated graphene (SGO) oxide into cellulose acetate (CA) beads for fast adsorption of cationic methylene blue (MB) dye. The formulated SGO@CA composite beads were thoroughly characterized by several tools including FTIR, TGA, SEM, XRD, XPS and zeta potential. The optimal levels of the most significant identified variables affecting the adsorption process were sequential determined by the response surface methodology (RSM) using Plackett–Burman and Box–Behnken designs. The gained results denoted that the surface of SGO@CA beads displayed the higher negative charges (− 42.2 mV) compared to − 35.7 and − 38.7 mV for pristine CA and SGO, respectively. In addition, the floated SGO@CA beads demonstrated excellent floating property, fast adsorption and easy separation. The adsorption performance was accomplished rapidly, since the adsorption equilibrium was closely gotten within 30 min. Furthermore, the adsorption capacity was greatly improved with increasing SGO content from 10 to 30%. The obtained data were followed the pseudo-second order kinetic model and agreed with Langmuir adsorption isotherm model with a maximum adsorption capacity reached 234.74 mg g−1. The thermodynamic studies designated the spontaneity and endothermic nature of MB dye adsorption. Besides, the floated beads exposed acceptable adsorption characteristics for six successive reuse cycles, in addition to their better adsorption selectivity towards MB dye compared to cationic crystal violet and anionic Congo red dyes. These findings assume that the formulated SGO@CA floated beads could be used effectively as highly efficient, easy separable and reusable adsorbents for the fast removal of toxic cationic dyes.

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“…As wastewater treatment is a promising technology in the current century, there was an urgent need to devise a new way to solve the water pollution problem with high efficiency and then increase the provision of safe water for use by reducing pollutants to a minimum or exploring the possibility of removing them (Mojiri and Bashir, 2022).…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Iron Oxide Nanoparticles and Using it to Support the Efficiency of Wastewater Filtration System

Al-Allaf¹,

Al-Rawi²,

AL-Ahmadi³

2023

RJS

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Nanoparticles biosynthesis has gained great importance as an active eco-friendly method with economic benefit which overcame on other chemical and physical methods.This research involved green biosynthesis of iron oxide nanoparticles (IONPs) using Escherichia coli (E.coli) isolated from wastewater in Mosul city. Characterization of nanoparticles was performed by using many techniques which included UV-Vis Spectroscopy, Scanning Electron Microscope (SEM), Atomic Force Microscope (AFM), X-Ray Diffraction (XRD) and Fourier Transforms Spectroscopy (FTIR).Designing of a locally lab scale wastewater treatment plant was done by using IONPs adding to a dual water purification system, after tightly wrapping the filter with (1%) of IONPs solution up to saturation. Moreover, control filter was used. Sample of wastewater was passed through these filters to detect its effect on wastewater quality, the results showed that NPs filters improved physical, chemical and biological properties of wastewater including total plate count, coliform, fecal coliform and total fungi.

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Wastewater Treatment: Current and Future Techniques

Cited by 26 publications

References 21 publications

An Eco-Friendly Modification of a Walnut Shell Biosorbent for Increased Efficiency in Wastewater Treatment

An Eco-Friendly Modification of a Walnut Shell Biosorbent for Increased Efficiency in Wastewater Treatment

Sulfonated graphene oxide impregnated cellulose acetate floated beads for adsorption of methylene blue dye: optimization using response surface methodology

Biosynthesis of Iron Oxide Nanoparticles and Using it to Support the Efficiency of Wastewater Filtration System

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