Lab-in-a-Microfibre

Canning, John

doi:10.1007/978-3-319-06998-2_10

Cited by 2 publications

(2 citation statements)

References 57 publications

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“…In order to neutralize the acidity, NaOH solution or Ca(OH) 2 slurry is used to treat the effluent and precipitate the Cr. It has been advised to use NaOH when the sludge formation needs to be minimized as much as possible [ 284 ]. The formation of a large amount of residual sludge, which creates difficulties in managing, transporting, final disposal issues, and associated cost, is one of the major problems of these techniques.…”

Section: Cr Removal Methodsmentioning

confidence: 99%

A Comprehensive Review of the Current Progress of Chromium Removal Methods from Aqueous Solution

Islam

Mohana

Rahman

et al. 2023

Toxics

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Chromium (Cr) exists in aqueous solution as trivalent (Cr3+) and hexavalent (Cr6+) forms. Cr3+ is an essential trace element while Cr6+ is a dangerous and carcinogenic element, which is of great concern globally due to its extensive applications in various industrial processes such as textiles, manufacturing of inks, dyes, paints, and pigments, electroplating, stainless steel, leather, tanning, and wood preservation, among others. Cr3+ in wastewater can be transformed into Cr6+ when it enters the environment. Therefore, research on Cr remediation from water has attracted much attention recently. A number of methods such as adsorption, electrochemical treatment, physico-chemical methods, biological removal, and membrane filtration have been devised for efficient Cr removal from water. This review comprehensively demonstrated the Cr removal technologies in the literature to date. The advantages and disadvantages of Cr removal methods were also described. Future research directions are suggested and provide the application of adsorbents for Cr removal from waters.

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Section: Cr Removal Methodsmentioning

confidence: 99%

A Comprehensive Review of the Current Progress of Chromium Removal Methods from Aqueous Solution

Islam

Mohana

Rahman

et al. 2023

Toxics

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“…Oxalic acid (OA) exists in the wastewater of many industries, such as anodizing of aluminum in OA/H 2 SO 4 bath, 1 the textile industry where oxalic acid is used to remove ink stains from fabrics in view of the acid's ability to reduce ferric compounds to more soluble ferrous salts, 2 the metallurgical industry where oxalate coating (oxalating) of alloy steel facilitates the cold working (shaping) of alloy steel, 3 etc. Besides OA is one of the products of catalytic oxidation of phenol, benzoquinone, and other aromatic compounds from waste solutions.…”

Section: Introductionmentioning

confidence: 99%

Demineralization of Oxalic Acid Solutions by Anodic Oxidation in a Stirred Tank Electrochemical Reactor: Experimental and Modeling Study

El Gheriany,

Abdel-Aziz,

El-Ashtoukhy

et al. 2024

Ind. Eng. Chem. Res.

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This study investigates the anodic oxidation of oxalic acid (OA) in wastewater by focusing on a stirred tank electrochemical reactor with a low-cost lead anode. The reactor design, which features a circular array of vertical lead cylinders, aims to enhance the current distribution and mass transfer. Response surface methodology (RSM) is employed to systematically explore the impact of the impeller rotation speed, current density, and initial OA concentration on the efficiency of OA removal. The investigation reveals that impeller rotation speed and current density significantly influence OA removal, while the initial OA concentration exhibits opposing effects. Notably, the study emphasizes the crucial role of contact time and reveals its significant influence on the overall process kinetics and adherence to first-order kinetics. The study also considers the role of sulfate ions in enhancing the electrochemical mineralization of OA. The derived empirical model provides insights into the interplay of operating parameters in influencing the oxidation kinetics. Additionally, the study employs RSM to optimize OA removal efficiency; in ideal circumstances, 96% of the acid was eliminated within a time frame of 2 h. Electrical energy consumed during electrolysis ranged from 2 to 11.4 kWh/kg contingent upon the specific operational parameters. The findings contribute to the design of efficient and environmentally friendly wastewater treatment processes for OA removal in diverse industrial applications. The merits of the present reactor compared with the traditional parallel plate cell are outlined.

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Lab-in-a-Microfibre

Cited by 2 publications

References 57 publications

A Comprehensive Review of the Current Progress of Chromium Removal Methods from Aqueous Solution

A Comprehensive Review of the Current Progress of Chromium Removal Methods from Aqueous Solution

Demineralization of Oxalic Acid Solutions by Anodic Oxidation in a Stirred Tank Electrochemical Reactor: Experimental and Modeling Study

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