Peracetic Acid Activated with Electro-Fe2+ Process for Dye Removal in Water

Yuan, Deling; Yang, Kai; Zhu, Eryu; Li, Xiongbo; Sun, Meihao; Xiao, Lichun; Hari, Qiga; Tang, Shoufeng

doi:10.3390/coatings12040466

Cited by 12 publications

(3 citation statements)

References 62 publications

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“…When the SO4 2− dosage enhanced to 20 mmol L −1 , the HA removal efficiency could reach 88.0%. According to the literature, SO4 2− does not react with active species generated in the system [33,34], so it does not affect the HA removal remarkably.…”

Section: Effect Of Common Anions In Watermentioning

confidence: 98%

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

et al. 2022

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Humic acid (HA) has complex molecular structure and is capable of adsorption, ion exchange, and chelation with organic and inorganic pollutants in water bodies, worsening water quality and jeopardizing human health and ecological environment. How to effectively remove HA from water is one of the research focuses of this paper. In this study, the UV-activated sodium perborate (SPB) synergistic system (UV/SPB) was established to eliminate HA in water. The effects of initial HA concentration, SPB dose, and initial pH value on the HA elimination were determined, and the main mechanisms of the synergy and HA degradation were explored. The outcomes show that the HA elimination ratio by the sole UV and only SPB system were only 0.5% and 1.5%, respectively. The HA removal of UV/SPB reached 88.8%, which can remove HA more effectively than other systems. Free radical masking experiment proved that hydroxyl radical produced by SPB activation is the main active substance for HA removal. The results of UV-vis absorption spectrum, absorbance ratio, specific UV absorbance, and excitation–emission matrix spectroscopy verified that the UV/SPB system can effectively decompose and mineralize HA.

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Section: Effect Of Common Anions In Watermentioning

confidence: 98%

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

et al. 2022

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“…An aliquot of solution was taken at fixed time intervals and filtered through a cellulose acetate membrane prior to analysis. The resulting absorbance (measured with UV-Vis or atomic absorption spectrometry) was compared to the corresponding standard curve using the Beer-Lambert law [11,12,23].…”

Section: Adsorption Test For Cb Gcb and Acid Treated Gcbmentioning

confidence: 99%

Enhancing Uptake Capability of Green Carbon Black Recycled from Scrap Tires for Water Purification

Choi,

Kang,

Yang

et al. 2024

Coatings

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This study reports on the highly simple fabrication of green carbon black (GCB) generated from scrap tires with acetic acid to improve the adsorption efficiency for water purification, which is thoroughly compared with conventional carbon black (CB) obtained from petrochemicals. Unlike traditional modification processes with strong acids or bases, the introduction of a relatively mild acid readily allowed for the effective modification of GCB to increase the uptake capability of metal ions and toxic organic dyes to serve as effective adsorbents. The morphological features and thermal decomposition patterns were examined by electron microscopy and thermogravimetric analysis (TGA). The surface functional groups were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The structural information (ratio of D-defects/G band-graphitic domains) obtained by Raman spectroscopy clearly suggested the successful fabrication of GCB (ID/IG ratio of 0.74), which was distinctively different from typical CB (ID/IG ratio of 0.91). In the modified GCB, the specific surface area (SBET) gradually increased with the reduction of pore size as a function of acetic acid content (52.97 m2/g for CB, 86.64 m2/g for GCB, 102.10-119.50 m2/g for acid-treated GCB). The uptake capability of the modified GCB (312.5 mg/g) for metal ions and organic dyes was greater than that of the unmodified GCB (161.3 mg/g) and typical CB (181.8 mg/g), presumably due to the presence of adsorbed acid. Upon testing them as adsorbents in an aqueous solution, all these carbon materials followed the Langmuir isotherm over the Freundlich model. In addition, the removal rates of cationic species (>70% removal of Cu2+ and crystal violet in 30 min) were much faster and far greater than those of anionic metanil yellow (<40% removal in 3 h), given the strong electrostatic interactions. Thus, this work demonstrates the possibility of recycling waste tires in the powder form of GCB as a cost-effective and green adsorbent that can potentially substitute traditional CB, and the modification strategy provides a proof of concept for developing simple fabrication guidelines of other carbonaceous materials.

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“…The sulfate anion concentration was increased to 20 mmol L -1 , which resulted in an 88.0 % increase in humic acid elimination effectiveness. The literature claims that sulfate anion does not interact with the reactive species produced in the system [33,34]; hence it has no impact on eliminating humic acid. As shown in Figure 3f, the increase of H 2 PO 4 anion little affected the humic acid elimination.…”

Section: Figure 3a Illustrates How Common Anions Including Hcomentioning

confidence: 99%

Ultraviolet-activated sodium perborate process (UV/SPB) for removing humic acid from water

Ibrahim

2022

Anal. Method Environ. Chem. J.

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Humic acid (HA) has a complex chemical composition and the ability to chelate, adsorb, and exchange ions with organic and inorganic contaminants in bodies of water, which worsens water quality and poses a threat to human health and the environment. In this research, an Ultraviolet-activated sodium perborate (UV/SPB) symbiotic method (UV/SPB) was developed to eliminate humic acid in water. The major synergistic and degradative processes of the humic acid were investigated, as well as the impact of the starting humic acid concentration, sodium perborate dose, and primary pH value on the humic acid elimination. Results indicate that just 0.5 % and 1.5 % of humic acid were eliminated mostly by sole UV and sole sodium perborate (SPB) methods, respectively. More effectively than other methods, UV/SPB removed humic acid with an efficiency of 88.83%. An experiment using free radicals to mask them revealed that the primary catalyst for humic acid removal is the hydroxyl radical generated by sodium perborate activation. The excitation-emission matrix spectroscopy, Ultraviolet-visible absorption (UV-Vis) spectrum, absorbance ratio values, specific Ultraviolet-visible absorbance values (SUVA), and UV/SPB method performance findings demonstrated the UV/SPB method's capability to degrade and mineralize humic acid.

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Peracetic Acid Activated with Electro-Fe2+ Process for Dye Removal in Water

Cited by 12 publications

References 62 publications

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

Humic Acid Removal in Water via UV Activated Sodium Perborate Process

Enhancing Uptake Capability of Green Carbon Black Recycled from Scrap Tires for Water Purification

Ultraviolet-activated sodium perborate process (UV/SPB) for removing humic acid from water

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