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

被引：12

作者：

Zhou, Yingping ^{[1
]}

Peng, Huijun ^{[1
]}

Jiang, Lijuan ^{[1
]}

Wang, Xiaolin ^{[1
]}

Tang, Yuqiong ^{[1
]}

Xiao, Lin ^{[1
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Xianlin Campus, Nanjing 210023, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2024年 / 462卷

基金：

中国国家自然科学基金;

关键词：

Cyanobacterial bloom control; Electro-oxidation; Electro-coagulation; Bloom flocs disintegration; Electro-nitrification and electro-denitrification; DISSOLVED ORGANIC-MATTER; MICROCYSTIS-AERUGINOSA; WASTE-WATER; ALGAE; ELECTROCOAGULATION; REMOVAL; PRETREATMENT; FENTON; ULTRAFILTRATION; INACTIVATION;

D O I：

10.1016/j.jhazmat.2023.132729

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The outbreaks of cyanobacterial blooms have caused severe threat to aquatic ecosystem and public health. In this work, electrochemical technology with RuO2/IrO2/Ti (RIT) or/and Al as anode for cyanobacterial bloom control and simultaneous water purification were studied. Compared with RIT-Al and Al electrodes, RIT exhibited the highest effects on bloom algae inactivation and inhibition of algae regrowth. Live/dead analysis, SEM, intracellular reactive oxygen species (ROS) and antioxidant system activities revealed that RIT could disintegrate bloom flocs and damage embedded algal cells due to high intensity of oxidation. With the lysis of cyanobacterial bloom, high content of intracellular compounds containing organic carbon, nitrogen and phosphorus released, necessitating water quality restoration. In the subsequent water purification process, RIT-Al overtook RIT and Al in removal of organic and nutrient pollutants due to the complex effects of electro-oxidation, coagulation, coprecipitation, electro-nitrification and electro-denitrification. Therefore, sequential electro-oxidation and electro-oxidation-coagulation process was an effective method for control cyanobacteria bloom and simultaneous removal of DOM, microcystin-LR (MC-LR), nitrogen and phosphorus, which is a promising technology.

引用

页数：10

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