4.7 Article

Improving ultrafiltration of algae-laden water with chitosan quaternary ammonium salt enhanced by sodium percarbonate

Related references

Note: Only part of the references are listed.
Article Green & Sustainable Science & Technology

In situ probing methanogenesis in anaerobic wastewater treatment using front-face excitation-emission matrix (FF-EEM) fluorescence

Huarong Yu et al.

Summary: Global warming and the energy crisis have led to an increased demand for renewable energy production and resource recovery. This study proposed a novel method for evaluating methanogenesis in anaerobic wastewater treatment by determining coenzyme F420 using front-face excitation-emission matrix (FF-EEM) fluorescence spectroscopy. The results showed that the FF-EEM-based method was simpler and more accurate than conventional F420 measurement. The study demonstrated that the FF-EEM-based method could effectively evaluate methanogenesis in anaerobic processes and assist in optimizing bioresource recycling in wastewater treatment.

JOURNAL OF CLEANER PRODUCTION (2023)

Article Environmental Sciences

Effect of ferrous-activated calcium peroxide oxidation on forward osmosis treatment of algae-laden water: Membrane fouling mitigation and mechanism

Chengsi Hou et al.

Summary: This study proposes a strategy of using ferrous-activated calcium peroxide (Fe(II)/CaO2) to control fouling in forward osmosis (FO) membrane during algae-laden water treatment. The Fe(II)/CaO2 treatment promotes the aggregation of algal contaminants, maintains cell viability and integrity, and efficiently removes organic contaminants. It also reduces fouling by decreasing the adhesion between contaminants and the FO membrane surface. The co-coagulation of in-situ Fe(III) and Ca(OH)2, as well as the oxidation of center dot OH, are the main mechanisms for fouling mitigation. Overall, the Fe(II)/CaO2 process effectively improves the efficiency of FO for algae-laden water treatment and has promising application prospects.

SCIENCE OF THE TOTAL ENVIRONMENT (2023)

Article Engineering, Chemical

Removal of algae and algogenic odor compounds via combined pre-chlorination and powdered activated carbon adsorption for source water pretreatment

Zheng-Xiong Zheng et al.

Summary: This study investigated the combination sequence and time interval of chlorination and PAC adsorption in order to control algae inactivation, algogenic odor removal, and DBP formation. The results showed that pre-chlorination/post-PAC had the highest algae removal efficiency and slight effect on DBP removal. The time interval between chlorination and PAC adsorption had a significant impact on algae and odor compound control.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

Article Engineering, Environmental

Comparison of peracetic acid and sodium hypochlorite enhanced Fe(II) coagulation on algae-laden water treatment

Lisan Cao et al.

Summary: In this study, Fe(II)/peracetic acid (PAA) and Fe(II)/sodium hypochlorite (NaClO) systems were used to enhance algae removal. Moderate oxidation with PAA and NaClO resulted in efficient removal of algae and turbidity, without damaging cell integrity. Fe(IV), organic radicals, and hydroxy radicals played important roles in Fe(II)/PAA system, while direct oxidation by NaClO contributed to preoxidation. Fe(III) promoted agglomerating and settling of algae. Excess NaClO but not PAA damaged algal cells, possibly due to direct oxidation of the cell wall/membrane.

JOURNAL OF HAZARDOUS MATERIALS (2023)

Article Environmental Sciences

Mutual activation between ferrate and calcium sulfite for surface water pre-treatment and ultrafiltration membrane fouling control

Jinchuan Lian et al.

Summary: In this study, ferrate (Fe(VI)) and calcium sulfite (CaSO3) were combined to improve ultrafiltration (UF) performance in surface water treatment. The combination of Fe(VI) and CaSO3 generated various active species, effectively eliminating fluorescent components. Dissolved organic carbon and UV254 were significantly reduced with Fe(VI)/CaSO3 = 0.05/0.15 mM. After UF, the removal rate for these parameters were further improved. The UF stage also resulted in reduced fouling and improved membrane performance.

SCIENCE OF THE TOTAL ENVIRONMENT (2023)

Article Engineering, Environmental

Preparation of Co3O4@carbon nanotubes modified ceramic membrane for simultaneous catalytic oxidation and filtration of secondary effluent

Xiaoxiang Cheng et al.

Summary: In this study, a novel Co3O4@carbon nanotubes modified ceramic membrane (Co3O4@CNT-CM) was prepared for simultaneous catalytic peroxymonosulfate (PMS) oxidation and filtration of secondary effluent. The Co3O4@CNT catalyst showed good dispersibility and a large number of active sites, and the Co3O4@CNT-CM had a smooth surface, high permeate flux, and excellent catalytic PMS ability. The Co3O4@CNT-CM demonstrated enhanced antifouling and water purification performance in the treatment of secondary effluent.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Engineering, Chemical

Tailored ultra-low pressure nanofiltration membranes for advanced drinking water treatment

Xiaoxiang Cheng et al.

Summary: A highly permeable nanofiltration (NF) membrane with excellent antifouling properties and selective separation capabilities for drinking water was developed using a low temperature-assisted interfacial polymerization (LTIP) method. The optimized membrane exhibited high water permeance and effective removal of organic matter/minerals, making it suitable for practical water treatment.

DESALINATION (2023)

Article Engineering, Environmental

Forward osmosis treatment of algal-rich water: Characteristics and mechanism of membrane fouling

Cong Ma et al.

Summary: The study found that the addition of coexisting components increased the attraction between pollutants and membranes, promoting the development of membrane fouling, especially with Ca2+ and HA exacerbating irreversible membrane fouling.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Engineering, Chemical

A moderate activated sulfite pre-oxidation on ultrafiltration treatment of algae-laden water: Fouling mitigation, organic rejection, cell integrity and cake layer property

Wenkai Liu et al.

Summary: In this study, a moderate oxidation strategy using in-situ pretreatment with ferrous activated sulfite was found to be effective in reducing membrane fouling and improving the rejection of organic matter in algae-laden water. The sulfite-based pretreatment also showed good removal of disinfection byproducts and increased the proportion of hydrophilic substances.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

Article Engineering, Chemical

Coagulation-ultrafiltration efficiency of polymeric Al-, Fe-, and Ti-coagulant with or without polyacrylamide composition

Min Xu et al.

Summary: The study found that PAC exhibited the best filtration flux under neutral and alkaline conditions, while pre-coagulation with TXC was slightly superior to PAC and PFS under acidic conditions. Overdosed coagulants also facilitated subsequent membrane filtration under acidic conditions, although pollutants may re-stabilize in solution.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

Article Green & Sustainable Science & Technology

A novel technology using iron in a coupled process of moderate preoxidation-hybrid coagulation to remove cyanobacteria in drinking water treatment plants

Yan Jin et al.

Summary: This study invented an iron-based coupled process of moderate preoxidation-hybrid coagulation, which effectively removes cyanobacterial cells and metabolites and alleviates filter unit fouling. It provides a better alternative for cyanobacterial removal in drinking water treatment plants.

JOURNAL OF CLEANER PRODUCTION (2022)

Article Biotechnology & Applied Microbiology

Oxidation-enhanced ferric coagulation for alleviating ultrafiltration membrane fouling by algal organic matter: A comparison of moderate and strong oxidation

Zhimeng Yang et al.

Summary: This study compared the effects of Fe(II)/permanganate and Fe(II)/persulfate on membrane fouling caused by extracellular organic matter. The results showed that Fe(II)/persulfate was more effective in alleviating membrane fouling and also induced a change in fouling mechanisms.

ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS (2022)

Review Engineering, Chemical

A comprehensive review on algae removal and control by coagulation-based processes: mechanism, material, and application

Bangxing Ren et al.

Summary: The increasing occurrence of harmful algae blooms globally poses significant challenges to water management. Coagulation is a key process in the treatment of water contaminated with algae, and optimizing coagulation conditions is critical for effectively removing algae cells without causing damage. Coagulation-based processes have also shown potential for mitigating eutrophication and controlling algal blooms in natural waterbodies. This review provides a comprehensive resource on coagulation-based techniques for algae removal, covering studies on source water management, treatment mitigation, experimental methods, coagulant materials, and practical considerations. The article concludes by identifying limitations and proposing directions for future research.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

Article Engineering, Environmental

Mechanism study on the effect of peracetic acid (PAA), UV/PAA and ultrasonic/PAA oxidation on ultrafiltration performance during algae-laden water treatment

Tingting Zhu et al.

Summary: In this study, peracetic acid (PAA), ultraviolet (UV)/PAA, and ultrasonic (US)/PAA pre-oxidation were used to improve the ultrafiltration (UF) performance for algae-laden water treatment. The results showed that PAA at a dosage of 10 mg/L achieved the best performance with a 76.26% reduction in membrane fouling resistance. Low dosage of UV/PAA effectively controlled fouling by enhancing the degradation of dissolved organics. The study also revealed that moderate oxidation, with high organic degradation and low cell rupture, was the key principle for algae-laden water treatment.

WATER RESEARCH (2022)

Article Engineering, Chemical

Effect of adsorption and coagulation pretreatment sequence on ultrafiltration membrane fouling: Process study and targeted prediction

Meng Chen et al.

Summary: The novel combined pretreatment strategy involving PAC adsorption and coagulation in specific sequences effectively reduces membrane fouling by optimizing floc morphology. The A-C pretreatment method is found to be more conducive for forming larger, stronger flocs with smaller fractal dimensions compared to C-A pretreatment, ultimately improving membrane permeability and fouling reversibility. Irreversible fouling is highly correlated with SUVA values and floc strength during different ultrafiltration cycles, providing valuable insights for diagnosing and prolonging the service life of ultrafiltration membranes.

DESALINATION (2022)

Article Environmental Sciences

Investigation of membrane fouling and mechanism induced by extracellular organic matter during long-term exposure to pharmaceuticals and personal care products

Weiwei Huang et al.

Summary: This study investigated the impact and mechanism of ultrafiltration membrane fouling by extracellular organic matter (EOM) and found potential threats to membrane treatment caused by pharmaceuticals and personal care products.

ENVIRONMENTAL RESEARCH (2022)

Article Green & Sustainable Science & Technology

Pollution history, source and transport path for PAHs in dated sediment cores from four lakes in Northern China

Huajie Sun et al.

Summary: This study analyzed the concentrations and compositions of PAHs in sediment cores from four lakes in northern China. It reconstructed the pollution history of PAHs and identified the sources of pollution. The results showed that the combustion of fossil fuels was the main source of PAHs, posing potential ecological risks. Additionally, meteorological conditions and human activities also influenced the sedimentation of PAHs.

JOURNAL OF CLEANER PRODUCTION (2022)

Article Environmental Sciences

Performance of gravity-driven membrane systems for algal water treatment: Effects of temperature and membrane properties

Li Lin et al.

Summary: This study investigates the effect of temperature on the performance of gravity-driven membrane (GDM) systems used for algae-rich water treatment. The results show that increasing temperature improves foulant removal and organic rejection, with different microbial activities observed for different membranes. The study highlights the importance of considering temperature and membrane properties in the design of GDM systems for algae water treatment.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Environmental Sciences

Enhancing ultrafiltration of algal-rich water using ferrate activated with sodium percarbonate: Foulants variation, membrane fouling alleviation, and collaborative mechanism

Jinchuan Lian et al.

Summary: A novel strategy coupling ferrate and sodium percarbonate was proposed to improve ultrafiltration (UF) performance and alleviate membrane fouling resulted by algal foulants. The coupling process activated ferrate to generate high-valent intermediates, which played a crucial role in high-efficiency oxidation for algal foulants. The collaborative effect of ferrate and sodium percarbonate increased the terminal specific flux and reduced fouling resistances.

CHEMOSPHERE (2022)

Article Engineering, Environmental

Iron-based technology coupling moderate preoxidation with hybrid coagulation for highly effective removal and moderate growth inhibition of Oscillatoria in drinking water treatment plants

Yan Jin et al.

Summary: This novel technology effectively tackles the issues caused by Oscillatoria in drinking water treatment plants by using a unique combination of preoxidation and hybrid coagulation, resulting in significant improvement in water quality.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Review Engineering, Environmental

Emerging applications of EEM-PARAFAC for water treatment: a concise review

Ivan Sciscenko et al.

Summary: This work summarizes the application of EEM-PARAFAC in water treatment processes. Its most common use is for the characterization and monitoring of dissolved organic matter (DOM) in freshwater ecosystems, drinking water treatment plants (DWTP) and wastewater treatment plants (WWTP). It has also been applied in the analysis of fluorescent compounds during water treatment processes, such as the degradation of various fluorescent CECs, estimation of CECs removal using PARAFAC components scores decay, and the study of interactions between DOM and other water constituents.

CHEMICAL ENGINEERING JOURNAL ADVANCES (2022)

Article Engineering, Environmental

Fe2+ activating sodium percarbonate (SPC) to enhance removal of Microcystis aeruginosa and microcystins with pre-oxidation and in situ coagulation

Xiaomeng Tian et al.

Summary: The study demonstrates that the Fe2+ activating sodium percarbonate (SPC/Fe2+) process effectively removes Microcystis aeruginosa without damaging cell integrity and reduces the release of MCs. Additionally, the treatment generates low levels of residual iron but caution should be taken to treat M. aeruginosa cells in stored sludge early.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Coupling sodium percarbonate (SPC) oxidation and coagulation for membrane fouling mitigation in algae-laden water treatment

Xiaoxiang Cheng et al.

Summary: A novel process combining sodium percarbonate oxidation and PACl coagulation was proposed to alleviate algal fouling in membrane water treatment processes. The synergistic effect of coagulation and oxidation enhanced the removal of algal pollutants, leading to improved membrane performance during algae-laden water treatment.

WATER RESEARCH (2021)

Article Engineering, Environmental

UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

Yiqun Chen et al.

JOURNAL OF HAZARDOUS MATERIALS (2017)

Article Engineering, Environmental

Benzene depletion by Fe2+-catalyzed sodium percarbonate in aqueous solution

Xiaori Fu et al.

CHEMICAL ENGINEERING JOURNAL (2015)

Article Engineering, Environmental

Chitosan enhanced coagulation of algal turbid waters - Comparison between rapid mix and ultrasound coagulation methods

Sara Ann Fast et al.

CHEMICAL ENGINEERING JOURNAL (2014)

Article Engineering, Environmental

Highly Permeable Double-Skinned Forward Osmosis Membranes for Anti-Fouling in the Emulsified Oil-Water Separation Process

Phuoc H. H. Duong et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2014)

Article Engineering, Chemical

Organic fouling in forward osmosis membranes: The role of feed solution chemistry and membrane structural properties

Machawe M. Motsa et al.

JOURNAL OF MEMBRANE SCIENCE (2014)

Article Engineering, Environmental

Organic Matter Fluorescence in Municipal Water Recycling Schemes: Toward a Unified PARAFAC Model

Kathleen R. Murphy et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2011)

Article Engineering, Environmental

Characterization of algal organic matter and formation of DBPs from chlor(am)ination

Jingyun Fang et al.

WATER RESEARCH (2010)

Review Polymer Science

Chitosan for coagulation/flocculation processes - An eco-friendly approach

F. Renault et al.

EUROPEAN POLYMER JOURNAL (2009)

Review Engineering, Environmental

The impact of algal properties and pre-oxidation on solid-liquid separation of algae

Rita Henderson et al.

WATER RESEARCH (2008)

Article Chemistry, Physical

A combined pore blockage and cake filtration model for protein fouling during microfiltration

CC Ho et al.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2000)