Research progress on removing typical organic heavy metal complexes from water by adsorption

Abstract

The efficient removal of low concentration, recalcitrant, and highly toxic organic heavy metal complexes in industrial wastewater is a hot issue in the field of heavy metal pollution control. Adsorption method has received considerable attention in the treatment of organic heavy metal complexes pollution due to its advantages of low cost, high efficiency and easy operation. This paper elaborated on the development situation and research progress of mainstream adsorbents in recent years in the field of removing typical EDTA-complexed heavy metals in water, commented on the advantages and disadvantages of different types of adsorbents and corresponding performance optimization methods, and summarized the reaction mechanisms of relevant adsorbents. The advantages and limitations of traditional organic heavy metal complexes pollution treatment technology and current new adsorption technology were compared, which provided a beneficial reference for reasonable selection of the best type of adsorbent in complex environments. The application performance and development potential of new adsorbents in the field of actual wastewater treatment contaminated with organic heavy metal complexes were listed. The priorities of future research and development directions of new adsorbents were envisioned to provide reference for the treatment of wastewater containing organic heavy metal complexes by adsorption.

Keywords

• industrial wastewater
• edta-complexed heavy metals
• adsorbents
• reaction mechanisms