Control of cyanobacterial bloom and purification of bloom-laden water by sequential electro-oxidation and electro-oxidation-coagulation

Zhou, Yingping; Peng, Huijun; Jiang, Lijuan; Wang, Xiaolin; Tang, Yuqiong; Xiao, Lin

doi:10.1016/j.jhazmat.2023.132729

Cited by 7 publications

(1 citation statement)

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“…Electrochemical oxidation (EO)-based technologies, with the advantages of small footprint, high efficiency, and chemical-free operation, could be the best fit. Previously, The EO treatment of algae and microcystins equipped with anodes made of boron-doped diamond, 11 metal oxide (RuO 2 and IrO 2 ), 12,13 and graphite 14 was investigated at the lab scale. We advanced the EO process by developing Ti 4 O 7 filter anodes with pore sizes of 24−53 μm for the treatment of HABimpacted lake water at both lab and full scales.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Cyanobacterial Harmful Algal Blooms by Electrochemical Ozonation: From Bench-scale Studies to Field Applications

Yang,

Quispe Cardenas,

Fariha

et al. 2024

Preprint

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Cyanobacterial harmful algal blooms (HABs) are an emerging threat to ecosystems, drinking water safety, and the recreational industry. As an environmental challenge intertwined with climate change and excessive nutrient discharge, HAB events occur more frequently and irregularly. This dilemma calls for fast-response treatment strategies. This study developed an electrochemical ozonation (ECO) process, which uses a Ni-Sb-SnO2 anode to produce locally concentrated ozone (O3) on electrodes to inactivate cyanobacteria and destroy microcystins within minutes. More importantly, the proof-of-concept was evolved into a full-scale boat-mounted completely mixed flow reactor for the treatment of HAB-impacted lake water at a treatment capacity of 544 m3/d and energy consumption of < 1 Wh/L. Both lab-scale and full-scale investigations show that the byproducts (e.g., chlorate, bromate, trihalomethanes, and haloacetic acids) in the ECO-treated lake water were below the regulatory limits for drinking water. The whole effluent toxicity tests suggest that ECO treatment at 10 mA/cm2 posed certain chronic toxicity to the model invertebrate (Ceriodaphnia dubia). However, the treatment at 7 mA/cm2 (identified as the optimum condition) did not increase toxicity to model invertebrate and fish (Pimephales promelas) species. This study is a successful example of leveraging fundamental innovations in electrocatalysis to solve real-world problems.

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