Acetylacetone effectively controlled the secondary metabolites of Microcystis aeruginosa under simulated sunlight irradiation

Wang, Xiaomeng; Luo, Yixin; Zhang, Shujuan; Zhou, Lixiang

doi:10.1016/j.jes.2022.12.004

Cited by 6 publications

(5 citation statements)

References 67 publications

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“…Microcystis aeruginosa (strain FACHB-905) was cultivated in sterilized BG11 medium with a 12 h/12 h light/dark cycle (4800 lx) at 25 °C. Algae-related organic matters were extracted using the previously reported method …”

Section: Experimental Sectionmentioning

confidence: 99%

“…Algae-related organic matters were extracted using the previously reported method. 31 Synchronous Photooxidation−Coagulation Experiment. Simulated algae-laden water was prepared by collecting the algal suspension, centrifuging it, and then resuspending it in chlorine-free tap water to an algal density of 1 × 10 6 cells/ mL.…”

Section: Materials and Reagentsmentioning

confidence: 99%

“…33 Furthermore, AA exhibited superior efficiency in degrading the toxic microcystin-LR (MC-LR) and destroying partial AOM under simulated solar irradiation. 31 The synchronous photooxidation−coagulation ability of TXC has been verified for arsenate [As(III)] treatment. 25 Upon introduction of UV 254 irradiation into the TXC coagulation process, AA oxidized As(III) into arsenate [As(V)] that was more easily removed by coagulation, thereby improving the efficiency of removal of arsenic over a wider pH range.…”

Section: ■ Introductionmentioning

confidence: 98%

“…Titanium xerogel coagulant (TXC), a novel Ti-based coagulant synthesized using the sol–gel method with TiCl 4 as the Ti precursor and acetylacetone (AA) as the hydrolytic regulator, has attracted a considerable amount of attention in recent years. − TXC exhibits dual functionality of coagulation and photooxidation, with the latter attributed to AA in its polymeric Ti–O–Ti skeleton structure . AA, a small molecule diketone with enol and keto isomers, has significant photoactivity, particularly under UV 254 irradiation. , Notably, the photooxidation efficiency of AA is comparable to that of H 2 O 2 owing to its strong light absorption capacity. , AA has shown effective performance under UV irradiation in various applications, such as decolorization of dye wastewater, simultaneous As(III) oxidation and nitrate reduction, decomplexation of Cu-EDTA compounds, and degradation of microcystin. ,− Previous research revealed that ∼0.07 mM AA was released to solution during coagulation treatment of algae-laden water at a TXC dose of 60 mg/L, which effectively decreased the extracellular microcystin concentration from 40 to 7 μg/L during a 16 day floc storage process . Furthermore, AA exhibited superior efficiency in degrading the toxic microcystin-LR (MC-LR) and destroying partial AOM under simulated solar irradiation .…”

Section: Introductionmentioning

confidence: 99%

“…AA, a small molecule diketone with enol and keto isomers, has significant photoactivity, particularly under UV 254 irradiation. , Notably, the photooxidation efficiency of AA is comparable to that of H 2 O 2 owing to its strong light absorption capacity. , AA has shown effective performance under UV irradiation in various applications, such as decolorization of dye wastewater, simultaneous As(III) oxidation and nitrate reduction, decomplexation of Cu-EDTA compounds, and degradation of microcystin. ,− Previous research revealed that ∼0.07 mM AA was released to solution during coagulation treatment of algae-laden water at a TXC dose of 60 mg/L, which effectively decreased the extracellular microcystin concentration from 40 to 7 μg/L during a 16 day floc storage process . Furthermore, AA exhibited superior efficiency in degrading the toxic microcystin-LR (MC-LR) and destroying partial AOM under simulated solar irradiation . The synchronous photooxidation–coagulation ability of TXC has been verified for arsenate [As(III)] treatment .…”

Section: Introductionmentioning

confidence: 99%

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Synchronous Photooxidation–Coagulation for the Efficient Treatment of Algae-Laden Water by Utilizing Titanium Xerogel Coagulant

Wang,

Luo,

Zhou

2023

ACS EST Water

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The combination of oxidation and coagulation is an effective strategy for algae-laden water treatment. Titanium xerogel coagulant (TXC) was reported to possess dual functionalities of coagulation and photooxidation, with the latter derived from acetylacetone (AA) present in its framework structure. In this study, synchronous photooxidation−coagulation of TXC was implemented to evaluate the efficiency of treatment of algae-laden water. The results showed that treatment with ultraviolet (UV) radiation and TXC (UV + TXC) significantly improved algal removal under neutral and alkaline conditions. At a dose of 5 mg of Ti/L, the efficiency of removal of algae increased from 12.2% to 66.9% compared to that of TXC coagulation alone (pH 7.0). The enhanced coagulation mechanism involved the effects of UV irradiation on the surface charge properties of algal cells and the inhibition of algal activity. The presence of AA partially alleviated cell rupture and reduced the rate of release of algal organic matter through its intrinsic photooxidation mechanism. N and P nutrients had negligible effects on the efficiency of the UV + TXC process, whereas Fe 2+ and Cu 2+ cations had complex effects. The synchronous photooxidation−coagulation process using TXC demonstrated highly efficient treatment of algae/As(III) cocontaminated water. Further research is warranted to explore the application of TXC in a practical polluted water body.

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Section: Experimental Sectionmentioning

confidence: 99%

Section: Materials and Reagentsmentioning

confidence: 99%