Use of carbon dioxide to enhance the brine purification and flocculation performance of PAM flocculants

Luo, Xingguo; Li, Xingbin; Wei, Chang; Shi, Xianguo; Zheng, Sanqiang; Deng, Zhigan

doi:10.1016/j.seppur.2021.118676

Cited by 10 publications

(3 citation statements)

References 24 publications

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“…As depicted in Figure 4c, all samples have intense peaks at 3336, 1510, 1356, and 964 cm −1 , which can be assigned to the OH stretch of H 2 O, −C�C, −C−C, and −C−O vibrations, respectively. 43 Furthermore, the spectra of the sample dosed with PAM have a peak at 1647 cm −1 , which can be ascribed to the bending vibration of N− H. 46 The peaks near 680, 610, and 480 cm −1 correspond to the vibration of Fe−O bonds. 43 As shown in Figure S10, SEM images and SEM−EDS elemental mapping suggested that the surface of flocs are rough and porous.…”

Section: Enhanced Toc Removal By Coagulation In the Imec Processmentioning

confidence: 99%

Cost-Effective Fe^IVO²⁺ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

Liu

Yang

et al. 2023

ACS EST Water

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Organic decontamination in saline wastewater was limited in the • OH-dominated oxidation processes due to the inevitable emergence of chlorinated byproducts, and the electrochlorination process could degrade the contaminants utilizing the inherent Cl − ions but shared the same problem. To solve this problem, an iron electrode was integrated to the electrochlorination system as a second anode, and 100% organic pollutant removal can be achieved. In the iron-modified electrochlorination (IMEC) process, Fe 2+ from the iron anode could react with the electrogenerated HClO, inducing the steady generation of iron-oxo (Fe IV O 2+ ) by a radical scavenger, probe experiments, and DFT calculation analyses. In comparison to the • OH-dominated processes, the majority of intermediates was biodegradable and moderately toxic for different aquatic organisms in the IMEC process, as indicated by in silico prediction. Furthermore, the coagulation mechanism could contribute to 23.3% removal of the total organic carbon in the pH adjustment process to the circumneutral level, and the coagulant aids further enhanced the coagulation efficiency to 41.4%. Finally, the system was found to be excellent for antibiotics removal in mariculture wastewater and costed an order of magnitude less than the most reported ferratebased processes. Overall, the research pioneers an electrochemical Fe IV O 2+ -dominated technology for efficient purification of saline water, and the ecofriendly and cost-effective properties endow it with a huge application potential in the saline wastewater.

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Section: Enhanced Toc Removal By Coagulation In the Imec Processmentioning

confidence: 99%

Cost-Effective Fe^IVO²⁺ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

Liu

Yang

et al. 2023

ACS EST Water

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“…[3][4][5][6][7] Flocculation is a common industrial water treatment process because of its simple operation and wide application range. [8][9][10][11][12][13] However, many of the existing occulants have safety risks, [14][15][16] so it is meaningful to develop efficient and environmentally suitable occulants.…”

Section: Introductionmentioning

confidence: 99%

The preparation of gallic acid-grafted cationic chitosan as effective salt-tolerant flocculants

Liu,

Zhao,

Wang

et al. 2024

RSC Adv.

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“…Organic polymer occulants include synthetic and natural polymer modi cation. The former is more common in PAM [25,26], PDMC [27,28], modi ed PVA [29,30], etc., and the latter is more common in various modi ed starch-based, cellulose-based occulants [31,32].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Crosslinking-Grafting Cationic Starch Flocculant and Its Study on Textile Dyes Removal

Zhang,

Li,

Cao

et al. 2024

J Polym Environ

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In the aim of textile printing and dyeing wastewater e cient and environmental friendly treatment, a cross-linked grafted cationic starch occulant CGSt was prepared to study its removal performance of textile dyes. Here in, corn starch (St) was used as raw material, methacryloyloxyethyl trimethyl ammonium chloride (DMC) and N.N'-methylenebisacrylamide (MBA) were used as cationization grafting monomer and crosslinking monomer, respectively, and an environmentally friendly Fenton initiation system was adopted. The chemical structure and physicochemical properties of CGSt were characterized SEM, XPS, XRD and FTIR. The occulation performance of CGSt on acid light yellow G, direct lake blue 5B and reactive brilliant blue KE-GN was investigated. The removal rate RR of CGSt to Acid Light Yellow G, Reactive Brilliant Blue KE-GN and Direct Lake Blue 5B reaches 97.2%, 96.3% and 97.2%, respectively. CGSt has a wide occulation window from 5 g/L to 12g/L. It maintains good occulation performance in a wide pH range from 4 to 9, and the RR was the highest when pH was 9, which is bene cial for the treatment of textile printing and dyeing wastewater with high alkalinity, complex composition and variable water quality by CGSt.

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Use of carbon dioxide to enhance the brine purification and flocculation performance of PAM flocculants

Cited by 10 publications

References 24 publications

Cost-Effective Fe^IVO²⁺ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

Cost-Effective Fe^IVO²⁺ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

The preparation of gallic acid-grafted cationic chitosan as effective salt-tolerant flocculants

Preparation of Crosslinking-Grafting Cationic Starch Flocculant and Its Study on Textile Dyes Removal

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Use of carbon dioxide to enhance the brine purification and flocculation performance of PAM flocculants

Cited by 10 publications

References 24 publications

Cost-Effective FeIVO2+ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

Cost-Effective FeIVO2+ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

The preparation of gallic acid-grafted cationic chitosan as effective salt-tolerant flocculants

Preparation of Crosslinking-Grafting Cationic Starch Flocculant and Its Study on Textile Dyes Removal

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Cost-Effective Fe^IVO²⁺ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater

Cost-Effective Fe^IVO²⁺ Generation for Antibiotics Removal in Electrochlorination of Mariculture Wastewater