Photoelectrocatalytic degradation of microcystin-LR using a dimensionally stable anode and the assessment of detoxification

Zhao, Yuan; Fan, Qianlong; Wang, Xiaoyu; Zhang, Wenwen; Hu, Xinxin; Liu, Chuang; Liang, Wenyan

doi:10.1016/j.cej.2019.03.029

Cited by 33 publications

(6 citation statements)

References 67 publications

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“…We summarize the toxicity of typical refractory organic pollutants with PEC treatment in Table . Luminescence inhibition assays, micronucleus assays with Vicia faba root tips, and single-cell gel electrophoresis assays were performed to study the toxicity change when PEC was used for microcystin-LR, and the results showed that both of the genotoxicity and the cytotoxicity were reduced upon the degradation of microcystin-LR; however, the products still exhibited acute toxicity . Zebrafish embryo assays are another simple method of acute toxicity assessment during PEC degradation .…”

Section: State Of the Art Of Photoelectrocatalysis For Environmental ...mentioning

confidence: 99%

“…Luminescence inhibition assays, micronucleus assays with Vicia faba root tips, and single-cell gel electrophoresis assays were performed to study the toxicity change when PEC was used for microcystin-LR, and the results showed that both of the genotoxicity and the cytotoxicity were reduced upon the degradation of microcystin-LR; however, the products still exhibited acute toxicity. 77 Zebrafish embryo assays are another simple method of acute toxicity assessment during PEC degradation. 78 In addition, the antibacterial activity of antibiotics such as cefotaxime for Staphylococcus aureus and Salmonella typhi has been tested to determine the toxicity with PEC degradation.…”

Section: ■ Introductionmentioning

confidence: 99%

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Perspective on Photoelectrocatalytic Removal of Refractory Organic Pollutants in Water Systems

Wang

Cai

et al. 2022

ACS EST Eng.

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Refractory organic pollutants pose a great threat to natural ecosystems and humans due to their potential biotoxicity. This perspective discusses photoelectrocatalysis (PEC) technology and engineering for the removal of typical toxic refractory organic pollutants in water systems. Specifically, PEC is suitable for treating specific types of water with low concentrations of contaminants and high toxicity. In addition, it can be feasibly combined with other treatment systems. By analyzing the many advantages of PEC, the principles and features of PEC systems, including electro-assisted photocatalysis (EPC) and photoassisted electrocatalysis (PEC) systems, and their synergistic effects have been systematically clarified. In accordance, detailed PEC systems, including adsorption-enhanced PEC, photoelectro-Fenton techniques, selective PEC,and resource recovery, which can simultaneously remove organic pollutants and transform energy via PEC, have been further developed and discussed. In this perspective, the intermediates of PEC oxidation and toxicity studies have also been highlighted. Finally, challenges and perspectives for the development of PEC techniques have been proposed for engineering applications.

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Section: State Of the Art Of Photoelectrocatalysis For Environmental ...mentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Perspective on Photoelectrocatalytic Removal of Refractory Organic Pollutants in Water Systems

Wang

Cai

et al. 2022

ACS EST Eng.

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“…Electrochemical oxidation (EO) is an emerging technology for decentralized water treatment, featuring the on-site production of oxidants, ease of operation, and high efficiency. However, only a handful of lab-scale studies have focused on removing cyanobacteria and microcystins. − These early works used plate-type anodes such as boron-doped diamond, platinum group metal oxide (IrO 2 and RuO 2 ), and graphite felt to produce oxidants (e.g., chlorine and hydroxyl radicals). The treatment efficiency is limited by the diffusion of oxidants from anodes to the bulk water.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Cyanobacterial Harmful Algal Blooms (cHABs) and Cyanotoxins by Electrochemical Oxidation: From a Bench-Scale Study to Field Application

et al. 2022

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Cyanobacterial harmful algal blooms (cHABs) and the concurrent release of cyanotoxins have become an emerging threat to aquatic life and drinking water safety. It is challenging for conventional water treatment infrastructures to mitigate cHAB events that occur frequently and irregularly. This study developed an emergency-responsive electrochemical oxidation and filtration (EOF) process that enables the pump-and-treat of phytoplankton plumes and cyanotoxins. Fundamental studies indicate that the EOF process generated locally concentrated free chlorine (>16 times higher than the bulk chlorine concentration) at the porous Ti4O7 filter anode surface. Lab tests showed that cyanobacteria and the cyanotoxin microcystin-LR were inactivated and destroyed by free chlorine when passing through the porous anode. Additionally, the concentration of disinfection byproducts generated by EOF was five times less than chlorination to achieve the same level of treatment. A boat-mount full-scale EOF system was developed and deployed in Lake Neatahwanta impacted by cHAB. The system can effectively remove >50% of phytoplankton and >80% of the ambient cyanotoxins at a treatment capacity of 110 m3/day and energy consumption of 1.1 kWh/m3. Instant improvement of effluent water clarity was achieved.

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“…This material can be defined as an anode that uses a titanium substrate and is commonly coated with oxides of iridium, ruthenium, cobalt, and lead, and these oxides will act as catalysts to intensify the production of oxidizing species. Zirconium, tantalum, and tin oxides are used as stabilizers and modulators [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Photoelectrocatalysis with Electrode Based on Ti/RuO2-TiO2 Modified with Tin and Tantalum Oxides for the Degradation of Indigo Blue Dye

et al. 2022

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Indigo Blue (IB) is a dye widely used by the textile sector for dyeing cellulose cotton fibers and jeans, being considered a recalcitrant substance, and therefore resistant to traditional treatments. Several methodologies are reported in the literature for the removal or degradation of dyes from the aqueous medium, among which photoelectrocatalysis stands out, which presents promising results in the degradation of dyes when a dimensionally stable anode (DSA) is used as a photoanode. In the present work, we sought to investigate the efficiency of a Ti/RuO2-TiO2 DSA modified with tin and tantalum for the degradation of indigo blue dye by photoelectrocatalysis. For this, electrodes were prepared by the thermal decomposition method and then a physical–chemical and electrochemical analysis of the material was carried out. The composition Ti/RuO2-TiO2-SnO2Ta2O5 (30:40:10:20) was compared to Ti/RuO2-TiO2 (30:70) in the photocatalysis, electrocatalysis, and photoelectrocatalysis tests. The photocatalysis was able to degrade only 63% of the IB at a concentration of 100 mg L−1 in 3 h, whereas the electrocatalysis and photoelectrocatalysis were able to degrade 100% of the IB at the same initial concentration in 65 and 60 min, respectively.

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Photoelectrocatalytic degradation of microcystin-LR using a dimensionally stable anode and the assessment of detoxification

Cited by 33 publications

References 67 publications

Perspective on Photoelectrocatalytic Removal of Refractory Organic Pollutants in Water Systems

Perspective on Photoelectrocatalytic Removal of Refractory Organic Pollutants in Water Systems

Mitigation of Cyanobacterial Harmful Algal Blooms (cHABs) and Cyanotoxins by Electrochemical Oxidation: From a Bench-Scale Study to Field Application

Evaluation of Photoelectrocatalysis with Electrode Based on Ti/RuO2-TiO2 Modified with Tin and Tantalum Oxides for the Degradation of Indigo Blue Dye

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