A state-of-the-art review on wastewater treatment techniques: the effectiveness of adsorption method

Rashid, Ruhma; Shafiq, Iqrash; Akhter, Parveen; Iqbal, Muhammad; Hussain, Murid

doi:10.1007/s11356-021-12395-x

Cited by 557 publications

(198 citation statements)

References 146 publications

Supporting

Mentioning

139

Contrasting

Unclassified

Order By: Relevance

“…Con clusively, a sufficient number of intermediate species are generated near the photocatalys to transform the sulfides (present closer to the oil-solvent interface) to eventually form sulfones. The charged oxidized species are soluble in the polar solvent and are removed from the reaction solution [46][47][48][49][50][51][52][53][54][55]. The possible mechanism is given by: V2O5 + light photons→e − (CB) + h + (VB) (3…”

Section: Proposed Mechanismmentioning

confidence: 99%

Systematic Assessment of Visible-Light-Driven Microspherical V2O5 Photocatalyst for the Removal of Hazardous Organosulfur Compounds from Diesel

et al. 2021

Self Cite

View full text Add to dashboard Cite

The organosulfur compounds present in liquid fuels are hazardous for health, asset, and the environment. The photocatalytic desulfurization technique works at ordinary conditions and removes the requirement of hydrogen, as it is an expensive gas, highly explosive, with a broader flammability range and is declared the most hazardous gas within a petroleum refinery, with respect to flammability. The projected work is based on the synthesis of V2O5 microspheres for photocatalytic oxidation for the straight-run diesel (SRD) and diesel oil blend (DOB). The physicochemical properties of V2O5 microspheres were examined by FT-IR, Raman, UV-vis DRS, SEM, and Photoluminescence evaluations. The as-synthesized photocatalyst presented a trivial unit size, a narrow bandgap, appropriate light-capturing capability, and sufficient active sites. The desulfurization study discovered that the anticipated technique is substantial in desulfurizing DOB up to 37% in 180 min using methanol as an interfacing agent. Furthermore, the outcome of employing a range of polar interfacing solvents was examined, and the 2-ethoxyethanol elevated the desulfurization degree up to 51.3%. However, the anticipated technology is constrained for its application in sulfur removal from SRD. Additionally, the mechanism for a photocatalytic reaction was seen in strong agreement with pseudo-first-order kinetics. The investigated photocatalyst exhibited a compromised recyclability and regeneration tendency.

show abstract

Section: Proposed Mechanismmentioning

confidence: 99%

Systematic Assessment of Visible-Light-Driven Microspherical V2O5 Photocatalyst for the Removal of Hazardous Organosulfur Compounds from Diesel

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Ozonation takes place by direct and indirect reactions. In a direct reaction, molecular ozone reacts with organic substances; the reaction takes place at pH<4 [19]. This methodology is highly selective.…”

Section: Ozonationmentioning

confidence: 99%

“…Therefore, it is generally more effective when applied to activated amines and aromatic hydrocarbon compounds [20]. The indirect reaction concerns the decomposition of ozone in water to form the •OH radical, which participates in the oxidation reaction [13] taking place at pH>10 [19]. During ozonation of the colour effluent, ozone initially attacks the unsaturated bonds of the chromophores, providing rapid colour elimination.…”

Section: Ozonationmentioning

confidence: 99%

See 1 more Smart Citation

Preliminary Study Into the Decolorization of Selected Dyes By the Ozone Application

Gerulová

Sanny

Kucmanová

et al. 2021

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

View full text Add to dashboard Cite

Synthetic dyes widely used in many kinds of industry affect the colour of wastewater when released to environment due to insufficient treatment in typical sewage treatment plants. Only a small dose of those dyes may significantly affect colour of water and, according to the chemical composition, may pose risks to wildlife and humans. In the research described in this study, decolorization of three various dyes was investigated. Since colour removal of Congo Red such as Methylene blue using ozone have been reported by several authors, and the literature on Naphthol Green B is rather limited, in the present study we compare the decolorization rate of CR, MB and NGB. The colour removal occurred quickly and more than 90% of colour reduction was achieved within 3-6 minutes throughout all tested pH of the solution.

show abstract

“…Water resources are contaminating with industrial effluent loaded with hazardous inorganic and organic pollutants. There are many wastewater treatment techniques for the removal of these toxicants (Chai et al, 2021;Massoudinejad et al, 2015;Pollard et al, 1992;Rashid et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Lab‐scale continuous flow studies for comparative biosorption of cadmium (II) on untreated and xanthated Ficus religiosa biomass

Tariq

Farooq

Athar

et al. 2021

Water Environment Research

View full text Add to dashboard Cite

The present studies report the use of an ecofriendly biomass Ficus religiosa in untreated (UFR) and xanthate treated (XFR) forms for the Cd (II) ions removal in a fixed bed column. FTIR, SEM-EDS, BET surface area, and elemental analysis (CHNS) techniques were used to characterize the biosorbents. The acquired data supported FTIR findings regarding the nature of functional groups present in the materials. Packed bed continuous flow studies explored the effects of various parameters such as Cd (II) ion concentration (100 mg/L-300 mg/L), bed heights (5 cm-30 cm), pH (3-5), at a constant linear flow rate ($1.13 cm/min).The obtained S-shaped breakthrough curves indicated the efficiency of the packed bed for the Cd (II) removal. Breakthrough time and exhaust times increased (67.5 min-390 min and 292.5 min-1852.5 min) (97.5 min-442.5 min and 345 min-1920 min) for unmodified and modified respectively with bed heights. The BDST, Thomas, and Yoon-Nelson models were used to evaluate the experimental results. The Yoon-Nelson model describes the breakthrough data more efficiently compared to other models. Under similar conditions, the modified material exhibited 400% increased capacity (55.20 mg/g) than that of unmodified material (13.33 mg/g). Thus, xanthate modification significantly enhanced the capacity for Cd (II) ions from aqueous solutions. Practitioner Points• Xanthate modification of Ficus religiosa is an environmentally friendly process.• Modified and unmodified materials were utilized for Cd (II) removal in fixed bed column process which is industrially viable process.• Low inlet Cd (II) concentration at pH 5 and higher bed height favored the continuous flow process at fixed flow rate.• Modification caused an increase of about 400% in the capacity of material.

show abstract

A state-of-the-art review on wastewater treatment techniques: the effectiveness of adsorption method

Cited by 557 publications

References 146 publications

Systematic Assessment of Visible-Light-Driven Microspherical V2O5 Photocatalyst for the Removal of Hazardous Organosulfur Compounds from Diesel

Systematic Assessment of Visible-Light-Driven Microspherical V2O5 Photocatalyst for the Removal of Hazardous Organosulfur Compounds from Diesel

Preliminary Study Into the Decolorization of Selected Dyes By the Ozone Application

Lab‐scale continuous flow studies for comparative biosorption of cadmium (II) on untreated and xanthated Ficus religiosa biomass

Contact Info

Product

Resources

About