Research progress of constructed wetlands coupled with microbial fuel cells for the treatment of heavy metal wastewater

Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 3

Abstract

Constructed wetland coupled with microbial fuel cell (CW-MFC) is a new technology that combines constructed wetland technology (CW) and microbial fuel cell (MFC). It overcomes the disadvantage that MFC cannot be self-contained, and can generate electric energy while treating various types of wastewater. It has broad application prospect and research significance. In recent years, a large number of studies have been carried out on the treatment of dye wastewater, salt-containing wastewater, pesticide wastewater, organic compounds wastewater and antibiotic-containing wastewater by CW-MFC, and important research progress has been made. However, the research content on the treatment of heavy metal wastewater by CW-MFC is limited. Therefore, based on the existing research, the research status of CW-MFC in removing heavy metals such as chromium, arsenic, zinc, nickel and lead was summarized from the aspects of electricity production and pollutant removal effect. The removal mechanism of heavy metals in CW-MFC was also expounded from the aspects of matrix, electrochemistry, microorganisms and plants. According to the research status and removal mechanism, it is found that the removal effect and electricity generation performance of CW-MFC on wastewater containing high-valence heavy metals (such as Cr(VI)) are better. The improved performance should be attributed to the strong oxidation property of high-valence heavy metals, which increases the redox gradient of CW-MFC, promotes the electricity generation of the system and improves the efficiency of electrochemical removal. Finally, the challenges and prospects of CW-MFC technology are discussed in order to provide a theoretical basis for its development.

Authors and Affiliations

DING Guoqing|School of Environment, Nanjing Normal University, China, WANG Xiao|School of Environment, Nanjing Normal University, China, WU You|School of Environment, Nanjing Normal University, China, NAN Jing|School of Environment, Nanjing Normal University, China, SONG Hailiang*|School of Environment, Nanjing Normal University, China, YANG Yuli|School of Environment, Nanjing Normal University, China

Keywords

Related Articles

Research progresses of noble metal (Pt, Pd, and Ru)-based catalysts for catalytic decomposition of chlorine-containing volatile organic compounds

Chlorine-containing volatile organic compounds (CVOCs) have become a focus and difficulty in the field of catalytic combustion of VOCs due to their extensive sources, high biological/environmental toxicity, and easy inac...

Catalytic purification of nitrogen oxides for complex industrial flue gas

Nitrogen oxides, as one of the main atmospheric pollutants, cause potential risks to human health and the atmospheric environment. In recent years, nitrogen oxide emissions from power plants have been reduced, and contro...

Research and policy recommendations on energy consumption management mechanism of pumped storage power station

With the widespread adoption of the carbon peak and carbon neutral strategy, photovoltaic, wind power, and other new energy sources have experienced a rapid development trend. Energy storage technology plays a crucial ro...

Electrochemical upgrading of bio-oil: Effect of acetic acid and aromatic-rich fraction on coke formation

Bio-oil is the only liquid carbon-containing renewable resource. Due to its complex composition, low calorific value, high acidity, high viscosity, and other factors, it requires upgrading before further utilization. Ele...

Research status and innovative utilization strategy of coal gangue resource in building material field

Coal gangue has been the biggest industrial solid waste discharged in our country, with the cumulative stockpile of more than 7 billion tons. The accumulation and discharge of coal gangue occupy a large amount of land, p...

Download PDF file
  • EP ID EP737958
  • DOI 10.20078/j.eep.20230113
  • Views 20
  • Downloads 0

How To Cite

DING Guoqing, WANG Xiao, WU You, NAN Jing, SONG Hailiang*, YANG Yuli (2023). Research progress of constructed wetlands coupled with microbial fuel cells for the treatment of heavy metal wastewater. Energy Environmental Protection, 37(3), -. https://europub.co.uk/articles/-A-737958