The removal of Cu(II)–EDTA chelates using green rust adsorption combined with ferrite formation process

Wang, Lei; Luo, Zhijun; Chelme-Ayala, Pamela; Wei, Jing; Zhou, Xiangtong; Min, Yanghong; El-Din, Mohamed Gamal; Wu, Zhiren

doi:10.1016/j.jenvman.2020.111516

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…The mechanical friction method is to clean the original coating by traditional methods such as sandblasting or steel brush grinding, and there are many disadvantages of such methods, such as low efficiency, poor environment, corners being difficult to deal with, etc. [7][8].…”

Section: Introductionmentioning

confidence: 99%

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

Gao,

Zhao,

Shangguan

et al. 2024

Applied Mathematics and Nonlinear Sciences

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Automated laser descaling represents a crucial advancement in marine maintenance, particularly in localized corrosion treatment. This research utilizes AH32 marine steel for corrosion testing, applying color feature extraction and the OTSU thresholding method, refined with morphological processing, to accurately delineate descaling areas. We have engineered a laser descaling protocol with an impressive 97% recognition accuracy through the innovative application of LabVIEW technology combined with machine vision. Implementing this technology promises enhanced corrosion resistance for marine vessels, setting a new standard for maintenance efficiency and quality.

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Section: Introductionmentioning

confidence: 99%

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

Gao,

Zhao,

Shangguan

et al. 2024

Applied Mathematics and Nonlinear Sciences

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“…When the corrosion layer is thick, the physical cleaning using a hard and stiff nylon brush is generally carried out prior to the chemical cleaning. For the chemical cleaning, some reagents, such as ethylenediaminetetraacetic acid (EDTA) and sodium tripolyphosphate (STPP) are used to remove green patinas [ 4 , 5 , 6 ]. EDTA is reported to have a strong dissolution ability of patina through the formation of a complex with Cu 2+ , and compared to this, STPP is known to be less effective in the dissolution of malachite and cuprite but less harmful to the base metal [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of Copper Corrosion Products by Using Green Deep Eutectic Solvent and Bio-Derivative Cellulose Membrane

et al. 2022

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A safe and environmentally friendly material for corrosion removal from metals is proposed in this article. Electrochemically corroded copper was selected as a target material, and a deep eutectic solvent (DES) composed of choline chloride and ascorbic acid, in a molar ratio of 2:1, was developed to this end. Aqueous solutions of the DES with a concentration above 70 wt% were found to be effective in the dissolution of patina and less aggressive towards other materials such as CaCO3, which is the main component of limestone. These concentrated DES solutions were integrated with either cotton swabs or cellulose-based membranes and used for the cleaning of electrochemically corroded copper. The membrane containing 80 wt% DES aqueous solution exhibited the most desirable cleaning ability in terms of speed and area selectivity. X-ray diffraction analysis of the corroded copper before and after the application of the membrane was performed to demonstrate the successful corrosion removal.

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“…Nevertheless, some commonly used adsorbents, such as activated carbon, mesoporous silica, and montmorillonite, have shown poor performances for the removal of heavy metal complexes [14]. Some new different types of adsorbents have been reported recently, such as pentaethylenehexamine-modified copolymers and chitosan-based adsorbents [15,16].…”

Section: Introductionmentioning

confidence: 99%

Functionalized moso bamboo powder adsorbent for Cd(II) complexes with citric acid/tartrate acid: characterization, adsorptive performance, and mechanism

Sun

Lin²,

Li³

et al. 2021

Environmental Engineering Research

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A new amine group functionalized moso bamboo powder adsorbent (AMBP) was prepared using a facile procedure to remove Cd(II) complexes with citric acid (CA) and tartrate acid (TA). The properties of the AMBP were characterized using SEM, FTIR, XPS, BET, and an elemental analysis. The adsorptive performances of the AMBP toward Cd(II)-CA/TA were investigated. The results indicated that amine group was successfully introduced, and the AMBP with a BET specific surface area of 0.463 m2/g was effective in adsorbing Cd(II)-CA/TA under pH 4.0–10.0. The removal of Cd(II) increased significantly when the Cd(II)/ligand molar ratio changed from 1:0.5 to 1:2. The adsorption processes of Cd(II)-CA/TA were endothermic and fit well with the pseudo-second-order kinetic model (R2 > 0.999). The Langmuir model (qmax of 14.41 and 7.58 mg/g for Cd(II)-CA and Cd(II)-TA, respectively) fit the isotherms better than the Freundlich model. The AMBP could be regenerated by HCl and reused at least 4 times. The uptake mechanisms of Cd(II)-CA/TA were proposed to be physisorption and the chemisorption of the coordination between –NH2/–NH and the Cd(II). This work shows that the AMBP is an adsorbent with high practical value to remove Cd(II) in water or wastewater containing CA/TA.

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The removal of Cu(II)–EDTA chelates using green rust adsorption combined with ferrite formation process

Cited by 9 publications

References 38 publications

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

Removal of Copper Corrosion Products by Using Green Deep Eutectic Solvent and Bio-Derivative Cellulose Membrane

Functionalized moso bamboo powder adsorbent for Cd(II) complexes with citric acid/tartrate acid: characterization, adsorptive performance, and mechanism

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