Preparation and flocculation performance study of a novel amphoteric alginate flocculant

Tian, Zhenle; Zhang, Liping; Sang, Xinxin; Shi, Gang; Ni, Caihua

doi:10.1016/j.jpcs.2020.109408

Cited by 21 publications

(5 citation statements)

References 43 publications

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“…Alginic acid ( Figure 8 ) salt—sodium alginate (SA)—is gaining popularity due to its biodegradability and relatively high content of carboxylic groups, which are responsible for the ability to adsorb heavy metal ions from water [ 108 ]. To enhance its flocculating action, Tian and co-workers [ 108 ] prepared an amphoteric alginate flocculant (SA-CTA) by combination of the polysaccharide with 3-chloro-2-hydroxypropyltrimethyl ammonium chloride (CTA). As a consequence of the presence of both cationic –N + (CH 3 ) 3 and anionic –COO– groups, the macromolecules of SA-CTA have an ability to flocculate heavy metal ions (Pb 2+ ), as well as negatively charged humic acids contaminating water.…”

Section: Bio-based Polysaccharide Flocculants For Water Treatmentmentioning

confidence: 99%

“…As a consequence of the presence of both cationic -N + (CH 3 ) 3 and anionic -COO-groups, the macromolecules of SA-CTA have an ability to flocculate heavy metal ions (Pb 2+ ), as well as negatively charged humic acids contaminating water. Alginic acid (Figure 8) salt-sodium alginate (SA)-is gaining popularity due to its biodegradability and relatively high content of carboxylic groups, which are responsible for the ability to adsorb heavy metal ions from water [108]. To enhance its flocculating action, Tian and coworkers [108] prepared an amphoteric alginate flocculant (SA-CTA) by combination of the polysaccharide with 3-chloro-2-hydroxypropyltrimethyl ammonium chloride (CTA).…”

Section: Other Examples Of Natural Polymers Flocculantsmentioning

confidence: 99%

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Recent Achievements in Polymer Bio-Based Flocculants for Water Treatment

2020

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Polymer flocculants are used to promote solid–liquid separation processes in potable water and wastewater treatment. Recently, bio-based flocculants have received a lot of attention due to their superior advantages over conventional synthetic polymers or inorganic agents. Among natural polymers, polysaccharides show many benefits such as biodegradability, non-toxicity, ability to undergo different chemical modifications, and wide accessibility from renewable sources. The following article provides an overview of bio-based flocculants and their potential application in water treatment, which may be an indication to look for safer alternatives compared to synthetic polymers. Based on the recent literature, a new approach in searching for biopolymer flocculants sources, flocculation mechanisms, test methods, and factors affecting this process are presented. Particular attention is paid to flocculants based on starch, cellulose, chitosan, and their derivatives because they are low-cost and ecological materials, accepted in industrial practice. New trends in water treatment technology, including biosynthetic polymers, nanobioflocculants, and stimulant-responsive flocculants are also considered.

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Section: Bio-based Polysaccharide Flocculants For Water Treatmentmentioning

confidence: 99%

Section: Other Examples Of Natural Polymers Flocculantsmentioning

confidence: 99%

Recent Achievements in Polymer Bio-Based Flocculants for Water Treatment

2020

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“…With an upswing in pH value, the carboxyl group present in the sodium alginate was de‐protonated, which exhibited an effective adsorption and chelating reactivity. [ 52 ] Alteration of pH leads to electrostatic attraction and the instability of colloidal particles; as a consequence, a greater amount of impurities are adsorbed on the surface of the flocculant, thereby upsurging the % sludge removal. However, flocculation performance has drastically decreased mainly due to the restabilization of colloids during the treatment of waste lubricant at a pH outside of the effective pH value.…”

Section: Resultsmentioning

confidence: 99%

Assessing the efficacy of three bio‐based flocculants in the reclamation of spent lubricating oil

Sarkar,

Datta,

Saha

et al. 2024

Can J Chem Eng

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The current study encompasses a comprehensive assessment of three biopolymeric flocculants on the overall performance of recycling waste lubricating oil to achieve a higher percentage recovery, flocculation efficacy, and better quality of recovered base oil. The findings reveal that with experimental conditions such as (i) mixing time of 80 min; (ii) agitation speed of 400 rpm; (iii) reaction temperature 50°C; (iv) solvent to waste oil ratio 3:1 g/g; and (v) flocculant dosage 1 g/ kg of solvents, 1‐butanol and sodium alginate gives highest percentage yield of 91% followed by corn starch of 89.10% and xanthan gum of 87.18% as bio‐polymer flocculant. The effects of various process parameters of bio‐flocculants on flocculation efficiency are expounded. With the process parameters of (i) initial pH of 5.9, 6.0, and 6.2; (ii) mixing time − 59, 60, and 63 min; and (iii) solution temperature of 59, 60, and 62.2°C, maximum flocculation efficacy (% sludge removal) of 16.24%, 13.01%, and 14.09% were attained for the cases of refined oil treated with sodium alginate, corn starch, and xanthan gum, respectively. Results also reveal that the physicochemical properties of refined base oil treated with 1‐butanol and sodium alginate as bio flocculant are almost close to the virgin lubricating oil. The optimum recovery of high‐quality base oil with the adoption of green technology and solvent–bio flocculant combination can mitigate the environmental impact of waste oil and create an energy‐efficient sustainable condition for the regeneration of re‐refined base oil.

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“…When pH < pHpzc, the surface of magnetic coagulant was positively charged, which is not conducive to the Pb 2+ flocculation removal under the action of electrostatic repulsion. [54] At pH > pHpzc, the surface of γ-Fe 2 O 3 @SHFA was negatively charged, and the removal efficiency of Pb 2+ increases slightly. However, with the increasing of pH value, Pb(OH) 2 precipitate was formed, and the Pb 2+ removal efficiency was decreased.…”

Section: The Point Of Zero Charge Of γ-Fe 2 O 3 @Shfamentioning

confidence: 94%

Removal of Pb²⁺ from Wastewater By γ‐Fe₂O₃@SHFA Based on Alkali‐Modified Fly Ash: Performance and Mechanism

Wang

Yuan

2022

Part & Part Syst Charact

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A magnetic coagulant (γ‐Fe2O3@SHFA) is prepared by fly ash and magnetic seed (γ‐Fe2O3) doping to remove Pb2+ from wastewater. The optimum modification conditions and doping procedures are determined by three‐factor and single‐factor experiments, respectively. The coagulation mechanism and properties of γ‐Fe2O3@SHFA are investigated. The results show that when the coagulant dosage is 1.0 g L−1, pH = 5.0 ± 0.2, and the coagulation reaction time is 20 min, the maximum Pb2+ removal capacity can reach 88.72 mg g−1. The point of zero charge, zeta potential, Brunner Emmet Teller, scanning electron microscope, X‐ray diffraction, and X‐ray photoelectron spectroscopy indicate that charge neutralization and bridging action play an important role in the removal process of Pb2+. Coagulation kinetic, isothermal, and thermodynamic analyses show that the removal behavior of the magnetic coagulant on Pb2+ is dominated by physical effects, and the coagulation process is spontaneous, endothermic, and irreversible. After five reuses, the Pb2+ removal capacity of γ‐Fe2O3@SHFA decreases from 73.55 to 51.11 mg g−1, which remains at a high level.

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Preparation and flocculation performance study of a novel amphoteric alginate flocculant

Cited by 21 publications

References 43 publications

Recent Achievements in Polymer Bio-Based Flocculants for Water Treatment

Recent Achievements in Polymer Bio-Based Flocculants for Water Treatment

Assessing the efficacy of three bio‐based flocculants in the reclamation of spent lubricating oil

Removal of Pb²⁺ from Wastewater By γ‐Fe₂O₃@SHFA Based on Alkali‐Modified Fly Ash: Performance and Mechanism

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Preparation and flocculation performance study of a novel amphoteric alginate flocculant

Cited by 21 publications

References 43 publications

Recent Achievements in Polymer Bio-Based Flocculants for Water Treatment

Recent Achievements in Polymer Bio-Based Flocculants for Water Treatment

Assessing the efficacy of three bio‐based flocculants in the reclamation of spent lubricating oil

Removal of Pb2+ from Wastewater By γ‐Fe2O3@SHFA Based on Alkali‐Modified Fly Ash: Performance and Mechanism

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Product

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Removal of Pb²⁺ from Wastewater By γ‐Fe₂O₃@SHFA Based on Alkali‐Modified Fly Ash: Performance and Mechanism